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ShallotAllium ascalonicum

The shallot (Allium ascalonicum) is a popular bulb vegetable appreciated for its fine, mild aroma. It is closely related to the common onion and is used as both a food and an aromatic vegetable. Shallots are relatively easy to grow and are well-suited for cultivation in gardens, on balconies, and in raised beds. They prefer a sunny location and well-draining, humus-rich soil. Sowing takes place directly outdoors in spring, with harvest in summer. With good care, shallots can be stored for several months.

Shallot (Allium ascalonicum): plant portrait for plant portrait - Vegetables, Amaryllis family, Harvest Jul, Aug
Shallot: plant portrait. harvest: Jul, Aug.

Quick profile

Key data

Planting

Mar, Apr

Harvest

Jul, Aug

Water

medium

Good neighbors

CarrotLettuceStrawberryHerbs (e.g., Parsley, Dill)

Avoid

CabbageBeanPea

Growing data

Shallot Growing data

Seed depth

1 - 2 cm

Plant spacing

10 - 15 cm

Row spacing

20 - 30 cm

Germination temp

10 - 18 °C

Sowing and germination

Seed depth1 - 2 cm
Germination temp10 - 18 °C
Germination time10 - 20 days
Seed viability1 - 2 years
Light germinatorNo
Dark germinatorYes
Cold germinatorNo
Stratification neededNo
Pre-soaking recommendedNo
Direct sowing possibleYes
Pre-culture recommendedNo

Planting and spacing

Plant spacing10 - 15 cm
Row spacing20 - 30 cm
Plants per m²30 - 50 per m²
Bed widthfrom 60 cm
Spacing3 plants per square

Temperature and site

Soil temperature7 - 12 °C
Growing temperaturefrom 7 °C
Optimal temperature15 - 22 °C
Frost sensitiveNo
Late frost sensitiveNo
Heat tolerancemedium
Cold tolerancemedium

Water, nutrients and care

Watermedium
Critical water phasesGrowth phase, Bulb formation
Watering methodFussbewässerung
Droughtmedium
Waterlogging sensitiveYes
Mulching recommendedYes
Nutrient needmedium_feeder
Compost recommendedYes
Fertilizer sensitivitylow

Container, support and growth

Container suitableYes
Pot sizeVolume: from 10 l; Recommended: from 20 l; Diameter: from 30 cm; Depth: from 20 cm
SupportNo
Height20 - 30 cm
Width10 - 15 cm
Root depth15 - 25 cm
Yield0.1 - 0.2 kg

Year plan

Shallot Calendar

All plants
Indoor sowingDirect sowingPlantingHarvest

Indoor sowing

No data

Shallots are generally not started indoors.

Direct sowing

MarApr

Direct sowing is possible as soon as the soil is workable and no hard frosts are expected.

Planting

MarApr

Seedlings or pre-grown plants can be transplanted outdoors after the last frosts.

Harvest

JulAug

Harvest when the leaves begin to wither. The bulbs should be dried thoroughly.

Year plan
  1. Sow directly outdoors or plant pre-grown shallots.
  2. Prepare soil, loosen, and weed.
  3. Sow directly outdoors or plant pre-grown shallots.
  4. First weeding if necessary.
  5. Regularly hoe and remove weeds.
  6. Water during dry spells.
  7. Continue weeding and watering as needed.
  8. Watch for pests like the onion fly.
  9. Stop fertilizing.
  10. Water as needed until leaves begin to wither.
  11. Harvest shallots as soon as the leaves wither.
  12. Let the harvested bulbs dry in a airy, dry place.
  13. Store dried shallots.
  14. Tidy up beds and prepare for the next crop.

Growing

Shallot Site, soil and care

Soil pH

6 - 7.5

Spacing

10 - 15 cm

Storage

Well-dried shallots can be stored cool, dark, and well-ventilated.

  • Title: Site Selection, Content: Choose a sunny, wind-sheltered spot with loose, well-draining soil. Absolutely avoid waterlogging.
  • Title: Sowing/Planting, Content: Sow directly outdoors in spring (March-April) or plant small bulbs/sets. Spacing approx. 10-15 cm in the row, 20-30 cm between rows.
  • Title: Care, Content: Regularly hoe and remove weeds. Water during dry spells, but avoid waterlogging. Fertilize only if necessary with organic fertilizer.
  • Title: Harvest, Content: When the leaves wither (July-August), carefully pull the shallots from the soil.
  • Title: Drying and Storage, Content: Let the harvested shallots dry in an airy, dry place until the necks are dry. Store cool, dark, and well-ventilated.
  • Title: Companion Planting, Content: Good neighbors include carrots, lettuce, strawberries, and herbs. Avoid cabbage and beans.
  • Title: Pest and Disease Prevention, Content: Strict crop rotation (at least 3-4 years break after other Allium species). Healthy plants and good hygiene are important.

Pruning

Shallot Pruning

not_applicable

Goal

not_applicable

Tools and hygiene

Clean tools after use to prevent disease spread.

Companion guide

Shallot Companion guide

Companion guide

Good neighbors

CarrotLettuceStrawberryHerbs (e.g., Parsley, Dill)Beetroot

Avoid

CabbageBeanPea

Health

Pests, Diseases

Pests

Onion fly

Small fly whose larvae infest and damage bulbs and roots.

Thrips (Onion thrips)

Small, slender insects that suck plant sap, leaving silvery speckles on the leaves.

Nematodes (e.g., Onion nematodes)

Microscopically small roundworms that grow within the plants, destroying them from the inside.

Diseases

Downy mildew

Fungal disease causing yellowish spots on leaves, followed by a purplish-grey sporulation in humid weather.

Fusarium rot

Fungal infection causing rot of the bulbs, often starting at the root or tip.

White rot

Fungal disease affecting the roots and base of the bulb, leading to plant death. Characterized by white, cottony mycelia and small black sclerotia.

Deficiencies

Nitrogen deficiency

  • Uniform yellowing of older leaves
  • Stunted plant growth
  • Small bulbs

Potassium deficiency

  • Yellowish margins on older leaves that later become necrotic
  • Poor bulb formation and storability
  • Reduced disease resistance

Magnesium deficiency

  • Yellowing between the leaf veins (intercostal chlorosis) on older leaves
  • Reddish discoloration possible

Plant health

FAQ

When is the best time to plant shallots?

The best time to sow or plant shallots is in spring, as soon as the soil is workable and no hard frosts are expected, usually from March to April.

How much space do shallots need?

Shallots should be planted with a spacing of about 10-15 cm in the row and 20-30 cm between rows. This ensures good air circulation and sufficient space for bulb development.

Can shallots grow in the shade?

Shallots prefer a sunny location. While they can grow in partial shade, yields and bulb development are best in full sun.

How do I know when shallots are ripe?

Shallots are ripe when the leaves begin to wither and fall over. This usually happens in summer, around July or August.

What is the best way to store shallots?

After harvesting, shallots should be dried thoroughly. Then store them in a cool, dark, and well-ventilated place, e.g., in a net bag or basket. This way, they can be stored for several months.

What are good neighbors for shallots?

Good neighbors for shallots include carrots, lettuce, strawberries, and various herbs like parsley or dill. They help deter pests and promote growth.

What diseases can affect shallots?

Common diseases include downy mildew, Fusarium rot, and white rot. Prevention through crop rotation, good ventilation, and healthy soil is crucial.

Related plants

Daffodil

Same family

Both belong to the Amaryllis family (Amaryllidaceae).

Tulip

Same family

Both belong to the Amaryllis family (Amaryllidaceae).

Onion

Same crop groupSimilar nutrient needsSimilar water needs

Both are bulb vegetables and belong to the genus Allium.

Require similar nutrient profiles, especially potassium for bulb development.

Garlic

Same crop group

Both are bulb vegetables and belong to the genus Allium.

Allium

Same crop group

Both are bulb vegetables and belong to the genus Allium.

Downy mildew

Shared diseases

Can also affect other Allium species.

Fusarium rot

Shared diseases

Commonly occurs in Allium species.

White rot

Shared diseases

A serious disease for Allium species.

Carrot

Similar nutrient needs

Require balanced nutrition, with potassium being important.

Sources

Public sources

  1. Wikidata entity

    Wikidata · 2026-05-15

  2. GBIF species match

    GBIF · 2026-05-15

  3. Deutschsprachige Wikipedia: Schalotte

    Wikipedia · 2026-05-15

  4. English Wikipedia: Shallot

    Wikipedia · 2026-05-15

  5. Trefle API: Allium ascalonicum

    Trefle · 2026-05-15

Details

More public plant data

Names
Common

Shallot

Plural

Shallots

BotanicalAllium ascalonicum
Botanical authorL.
Synonyms
  1. shallot
  2. Shallot
Common synonyms
  1. shallot
  2. Shallot
Regional names
Historical names
Market names
Misspellings
Search terms
  1. shallot
  2. Allium ascalonicum
Taxonomy
KingdomPlantae
Clades
  1. Tracheophytes
  2. Angiosperms
  3. Monocots
  4. Asparagales
OrderAsparagales
Family botanicalAmaryllidaceae
Family

Amaryllis family

Family idamaryllidaceae
GenusAllium
SpeciesAllium ascalonicum
Classification
Main groupVegetable
Sub groupBulb Vegetable
Crop groupAllium
Life cyclebiennial
Perennialno
Woodyno
Treeno
Shrubno
Edible parts
  1. Bulb
Nutrient groupAromatic
Calendar
Sowing indoor
Notes

Shallots are generally not started indoors.

Sowing outdoor
Months
  1. 3
  2. 4
Earliest month3
Latest month4
Notes

Direct sowing is possible as soon as the soil is workable and no hard frosts are expected.

Planting out
Months
  1. 3
  2. 4
Earliest month3
Latest month4
Notes

Seedlings or pre-grown plants can be transplanted outdoors after the last frosts.

Harvest
Months
  1. 7
  2. 8
Earliest month7
Latest month8
Notes

Harvest when the leaves begin to wither. The bulbs should be dried thoroughly.

Month tasks
3
  1. Sow directly outdoors or plant pre-grown shallots.

  2. Prepare soil, loosen, and weed.

4
  1. Sow directly outdoors or plant pre-grown shallots.

  2. First weeding if necessary.

5
  1. Regularly hoe and remove weeds.

  2. Water during dry spells.

6
  1. Continue weeding and watering as needed.

  2. Watch for pests like the onion fly.

7
  1. Stop fertilizing.

  2. Water as needed until leaves begin to wither.

8
  1. Harvest shallots as soon as the leaves wither.

  2. Let the harvested bulbs dry in a airy, dry place.

9
  1. Store dried shallots.

  2. Tidy up beds and prepare for the next crop.

Month tasks structured
3
  1. TaskAussaat/Pflanzung
    Label

    Sow directly outdoors or plant pre-grown shallots.

    Priorityhigh
    Months
    1. 3
    ConditionBoden bearbeitbar, keine starken Fröste
    Estimated effortmedium
    Notes

    Choose a sunny location and loose soil.

  2. TaskBodenpflege
    Label

    Prepare soil, loosen, and weed.

    Priorityhigh
    Months
    1. 3
    Estimated effortmedium
    Notes

    Good soil preparation is crucial for growth.

4
  1. TaskAussaat/Pflanzung
    Label

    Sow directly outdoors or plant pre-grown shallots.

    Priorityhigh
    Months
    1. 4
    ConditionBoden bearbeitbar, keine starken Fröste
    Estimated effortmedium
    Notes

    Late sowing is possible, but harvest may be delayed.

  2. TaskUnkrautbekämpfung
    Label

    First weeding if necessary.

    Prioritymedium
    Months
    1. 4
    Estimated effortlow
    Notes

    Early removal of weeds reduces competition.

5
  1. TaskPflege
    Label

    Regularly hoe and remove weeds.

    Priorityhigh
    Months
    1. 5
    Estimated effortmedium
    Notes

    Keep the soil loose and weed-free.

  2. TaskBewässerung
    Label

    Water during dry spells.

    Prioritymedium
    Months
    1. 5
    ConditionTrockenheit
    Estimated effortlow
    Notes

    Consistent moisture promotes bulb growth.

6
  1. TaskPflege
    Label

    Continue weeding and watering as needed.

    Priorityhigh
    Months
    1. 6
    Estimated effortmedium
    Notes

    Ensure good air circulation around the plants.

  2. TaskSchädlingskontrolle
    Label

    Watch for pests like the onion fly.

    Prioritymedium
    Months
    1. 6
    Estimated effortlow
    Notes

    Cultural practices like mulching can help.

7
  1. TaskErntevorbereitung
    Label

    Stop fertilizing.

    Priorityhigh
    Months
    1. 7
    Estimated effortlow
    Notes

    This promotes bulb maturation.

  2. TaskBewässerung
    Label

    Water as needed until leaves begin to wither.

    Prioritymedium
    Months
    1. 7
    ConditionTrockenheit
    Estimated effortlow
    Notes

    Reduce watering towards the end of the growing period.

8
  1. TaskErnte
    Label

    Harvest shallots as soon as the leaves wither.

    Priorityhigh
    Months
    1. 8
    ConditionBlätter welken
    Estimated effortmedium
    Notes

    Gently pull from the soil to avoid damage.

  2. TaskTrocknung
    Label

    Let the harvested bulbs dry in a airy, dry place.

    Priorityhigh
    Months
    1. 8
    Estimated effortmedium
    Notes

    This is important for storage.

9
  1. TaskLagerung
    Label

    Store dried shallots.

    Priorityhigh
    Months
    1. 9
    ConditionZwiebeln trocken und gut gereift
    Estimated effortmedium
    Notes

    Store in a cool, dark, and well-ventilated place.

  2. TaskGartenpflege
    Label

    Tidy up beds and prepare for the next crop.

    Prioritymedium
    Months
    1. 9
    Estimated effortlow
    Notes

    Remove plant debris and incorporate compost.

Book content
Overview

The shallot (Allium ascalonicum) is a popular bulb vegetable appreciated for its fine, mild aroma. It is closely related to the common onion and is used as both a food and an aromatic vegetable. Shallots are relatively easy to grow and are well-suited for cultivation in gardens, on balconies, and in raised beds. They prefer a sunny location and well-draining, humus-rich soil. Sowing takes place directly outdoors in spring, with harvest in summer. With good care, shallots can be stored for several months.

Structured month tasks
3
  1. TaskAussaat/Pflanzung
    Label

    Sow directly outdoors or plant pre-grown shallots.

    Priorityhigh
    Months
    1. 3
    ConditionBoden bearbeitbar, keine starken Fröste
    Estimated effortmedium
    Notes

    Choose a sunny location and loose soil.

  2. TaskBodenpflege
    Label

    Prepare soil, loosen, and weed.

    Priorityhigh
    Months
    1. 3
    Estimated effortmedium
    Notes

    Good soil preparation is crucial for growth.

4
  1. TaskAussaat/Pflanzung
    Label

    Sow directly outdoors or plant pre-grown shallots.

    Priorityhigh
    Months
    1. 4
    ConditionBoden bearbeitbar, keine starken Fröste
    Estimated effortmedium
    Notes

    Late sowing is possible, but harvest may be delayed.

  2. TaskUnkrautbekämpfung
    Label

    First weeding if necessary.

    Prioritymedium
    Months
    1. 4
    Estimated effortlow
    Notes

    Early removal of weeds reduces competition.

5
  1. TaskPflege
    Label

    Regularly hoe and remove weeds.

    Priorityhigh
    Months
    1. 5
    Estimated effortmedium
    Notes

    Keep the soil loose and weed-free.

  2. TaskBewässerung
    Label

    Water during dry spells.

    Prioritymedium
    Months
    1. 5
    ConditionTrockenheit
    Estimated effortlow
    Notes

    Consistent moisture promotes bulb growth.

6
  1. TaskPflege
    Label

    Continue weeding and watering as needed.

    Priorityhigh
    Months
    1. 6
    Estimated effortmedium
    Notes

    Ensure good air circulation around the plants.

  2. TaskSchädlingskontrolle
    Label

    Watch for pests like the onion fly.

    Prioritymedium
    Months
    1. 6
    Estimated effortlow
    Notes

    Cultural practices like mulching can help.

7
  1. TaskErntevorbereitung
    Label

    Stop fertilizing.

    Priorityhigh
    Months
    1. 7
    Estimated effortlow
    Notes

    This promotes bulb maturation.

  2. TaskBewässerung
    Label

    Water as needed until leaves begin to wither.

    Prioritymedium
    Months
    1. 7
    ConditionTrockenheit
    Estimated effortlow
    Notes

    Reduce watering towards the end of the growing period.

8
  1. TaskErnte
    Label

    Harvest shallots as soon as the leaves wither.

    Priorityhigh
    Months
    1. 8
    ConditionBlätter welken
    Estimated effortmedium
    Notes

    Gently pull from the soil to avoid damage.

  2. TaskTrocknung
    Label

    Let the harvested bulbs dry in a airy, dry place.

    Priorityhigh
    Months
    1. 8
    Estimated effortmedium
    Notes

    This is important for storage.

9
  1. TaskLagerung
    Label

    Store dried shallots.

    Priorityhigh
    Months
    1. 9
    ConditionZwiebeln trocken und gut gereift
    Estimated effortmedium
    Notes

    Store in a cool, dark, and well-ventilated place.

  2. TaskGartenpflege
    Label

    Tidy up beds and prepare for the next crop.

    Prioritymedium
    Months
    1. 9
    Estimated effortlow
    Notes

    Remove plant debris and incorporate compost.

Cultivation specs
Seed
Seed depth cm min.1
Seed depth cm max.2
Light germinatorno
Dark germinatoryes
Cold germinatorno
Stratification neededno
Pre soaking recommendedno
Germination temperature c min.10
Germination temperature c max.18
Germination days min.10
Germination days max.20
Seed lifespan years min.1
Seed lifespan years max.2
Direct sowing possibleyes
Pre culture recommendedno
Spacing
Plant spacing cm min.10
Plant spacing cm max.15
Row spacing cm min.20
Row spacing cm max.30
Recommended density per sqm min.30
Recommended density per sqm max.50
Min. bed width60 cm
Square foot gardening spacing3 plants per square
Spacing notes

Closer spacing results in smaller bulbs, wider spacing in larger ones.

Growth dimensions
Height cm min.20
Height cm max.30
Width cm min.10
Width cm max.15
Root depth cm min.15
Root depth cm max.25
Growth speedmedium
Final size notes

Bulb size depends on variety, spacing, and growing conditions.

Temperature
Min. growing temperature7 °C
Optimal temperature c min.15
Optimal temperature c max.22
Max. heat tolerance30 °C
Soil temperature for sowing c min.7
Soil temperature for sowing c optimal12
Frost sensitiveno
Late frost sensitiveno
Heat tolerancemedium
Cold tolerancemedium
Temperature notes

Shallots prefer cooler weather during growth and warmer weather during maturation.

Water
Water needmedium
Critical water phases
  1. Growth phase
  2. Bulb formation
Drought tolerantno
Drought sensitivitymedium
Waterlogging sensitiveyes
Mulching recommendedyes
Water notes

Consistent soil moisture is important; avoid waterlogging.

Nutrition
Nutrient groupmedium_feeder
Heavy feederno
Medium feederyes
Light feederno
Nitrogen needmedium
Phosphorus needmedium
Potassium needhigh
Calcium needlow
Magnesium needlow
Compost recommendedyes
Mulching recommendedyes
Fertilizer sensitivitylow
Nutrition notes

Balanced fertilization, especially potassium, is important for bulb formation and storage quality.

Container
Container suitableyes
Min. pot volume10 l
Recommended pot volume20 l
Min. pot depth20 cm
Min. pot diameter30 cm
Plants per container min.3
Plants per container max.5
Drainage requiredyes
Repotting neededno
Container notes

Sufficient pot size and good drainage are important.

Support
Needs supportno
Support recommendedno
Climbingno
Viningno
Trellis recommendedno
Training requiredno
Support notes

No support measures required.

Cultivation modes
Outdoor bed suitableyes
Raised bed suitableyes
Container suitableyes
Balcony suitableyes
Greenhouse suitableno
Polytunnel suitableno
Indoor suitableno
Windowsill suitableno
Hydroponic possibleno
Permaculture suitableyes
No dig suitableyes
Yield density
Yield per plant min.0.1
Yield per plant max.0.2
Yield unitkg
Yield per sqm min.2
Yield per sqm max.4
Yield reliabilitymedium
Yield notes

Yields can vary depending on variety, soil quality, and care.

Site
Location

Sunny to partial shade

Exposure

Sheltered from wind

Soil pH min.6
Soil pH max.7.5
Soil texture

Well-draining, humus-rich, sandy loam

Site notes

Prefers a warm location protected from strong winds.

Soil
Type

Garden soil, raised bed, container

Preparation

Loosen deeply, incorporate compost, avoid waterlogging.

Soil notes

Shallots prefer loose, well-aerated soil rich in nutrients.

Watering
Frequency

Regularly, especially during dry periods

Method

Directly at the roots, not over the leaves

Water quality

No special requirements, rainwater preferred

Watering notes

Consistent moisture is important for bulb formation. Absolutely avoid waterlogging.

Nutrition
Fertilization schedule

Incorporate compost well before planting. If needed, fertilize during the growing season with a balanced liquid fertilizer.

Fertilizer types
  1. Compost
  2. Organic liquid fertilizer (e.g., comfrey, nettle)
  3. Potassium-rich special fertilizer for bulb vegetables
Nutrition notes

Sufficient potassium promotes storability. Reduce nitrogen applications towards the end of cultivation.

Cultivation planning
Succession sowing
Possibleno
Bed planning notes

Shallots can be grown well in mixed culture with carrots, lettuce, or strawberries. Do not plant next to peas or cabbage.

Rotation prioritymedium
Interplanting potentialhigh
Mechanization relevancelow
Crop rotation
Notes

Shallots should not be grown immediately after other Allium species (onions, garlic, leeks) to avoid disease and pest infestation. A break of 3-4 years is recommended. Good preceding crops include leafy vegetables, root vegetables (except carrots, which can be sensitive to residues), or legumes.

Prioritymedium
Good predecessors
  1. Slugsalat
    Name

    Lettuce

  2. Slugspinat
    Name

    Spinach

  3. Slugbohne
    Name

    Bean

  4. Slugerbse
    Name

    Pea

Bad predecessors
  1. Slugzwiebel
    Name

    Onion

  2. Slugknoblauch
    Name

    Garlic

  3. Sluglauch
    Name

    Leek

Deficiencies
Nitrogen deficiency
Slugnitrogen_deficiency
Name

Nitrogen deficiency

Symptoms
  1. Uniform yellowing of older leaves
  2. Stunted plant growth
  3. Small bulbs
Management
  1. Balanced fertilization with nitrogen-rich organic fertilizers at the beginning of the growth phase
  2. Incorporate compost
Potassium deficiency
Slugpotassium_deficiency
Name

Potassium deficiency

Symptoms
  1. Yellowish margins on older leaves that later become necrotic
  2. Poor bulb formation and storability
  3. Reduced disease resistance
Management
  1. Use potassium-rich fertilizers (e.g., wood ash, potassium sulfate)
  2. Balanced fertilization
Magnesium deficiency
Slugmagnesium_deficiency
Name

Magnesium deficiency

Symptoms
  1. Yellowing between the leaf veins (intercostal chlorosis) on older leaves
  2. Reddish discoloration possible
Management
  1. Epsom salt for foliar application
  2. Soil analysis to determine magnesium content
Problems
Bolting
Slugbolting
Name

Bolting

Description

Premature flowering instead of bulb development, often caused by stress factors.

Symptoms
  1. Formation of a flower stalk in the center of the bulb
  2. Reduced or no bulb development
  3. Impaired quality
Management
Prevention
  1. Avoid stress factors (temperature fluctuations, drought, nutrient deficiency)
  2. Variety selection (less prone to bolting varieties)
  3. Consistent growing conditions
Control
  1. Remove bolting plants as they will not produce a good harvest
  2. Can be used for culinary purposes (flower stalk and leaves)
Poor bulb formation
Slugpoor_bulb_formation
Name

Poor bulb formation

Description

Insufficient development of the bulbs.

Symptoms
  1. Small, poorly formed bulbs
  2. Long, thin leaves
  3. Little to no storage life
Management
Prevention
  1. Adequate nutrient supply (especially potassium)
  2. Consistent watering
  3. Sufficient light and warmth
  4. Correct planting distance
Control
  1. Optimize growing conditions
  2. Fertilize if necessary
Problem management
Common pest groups
  1. Flies (Onion fly)
  2. Sucking pests (Thrips)
  3. Nematodes
Common disease groups
  1. Fungal diseases (Downy mildew, Fusarium, White rot)
Prevention principles
  1. Strictly adhere to crop rotation (at least 3-4 years break after Allium species).
  2. Use healthy, disease-free planting material.
  3. Site selection: sunny, well-ventilated, sheltered from wind.
  4. Soil care: Loose, well-draining, humus-rich soil. Avoid waterlogging.
  5. Mixed cropping with suitable partners (e.g., carrots, lettuce).
  6. Cultural practices: Timely sowing/planting, hoeing for weed control, mulching.
  7. Encourage beneficial insects.
Diagnosis notes

Accurate diagnosis often requires examination of the bulbs and roots for pests or pathogens. Pay attention to typical symptoms and environmental conditions.

Disease graph
ScopeAllium
Profiles
  1. Slugdowny_mildew
    Severitymedium
    Conditions
    1. High humidity
    2. Mild temperatures
    3. Poor ventilation
    Affected parts
    1. Leaves
    2. Stems
    Prevention
    1. Crop rotation
    2. Good ventilation
    3. Resistant varieties
    Organic control
    1. Copper preparations
    2. Plant extracts (e.g., horsetail)
  2. Slugfusarium_rot
    Severitymedium
    Conditions
    1. High soil temperature
    2. Soil compaction
    3. High humidity
    Affected parts
    1. Roots
    2. Bulb
    Prevention
    1. Crop rotation
    2. Good drainage
    3. Avoid soil damage
    Organic control
    1. Remove infested plants
    2. Soil improvement
  3. Slugwhite_rot
    Severityhigh
    Conditions
    1. Cool, moist conditions
    2. Soil compaction
    Affected parts
    1. Roots
    2. Bulb base
    3. Soil
    Prevention
    1. Long crop rotation
    2. Infestation-free material
    3. Soil hygiene
    Organic control
    1. No direct biological control possible, focus on prevention
Diagnostic rules
  1. Symptom

    Yellowish spots on leaves, later purplish-grey coating on the underside.

    Possible causes
    1. downy_mildew
    First checks
    1. Check humidity
    2. Assess temperature and ventilation
  2. Symptom

    Soft, brown or pink rot on the bulb, leaves yellow and wilt.

    Possible causes
    1. fusarium_rot
    First checks
    1. Examine bulb (base and tip)
    2. Check soil moisture and temperature
  3. Symptom

    Plant wilts and dies from the top down, white fungal growth at the bulb base, black sclerotia in the soil.

    Possible causes
    1. white_rot
    First checks
    1. Inspect root area and bulb base
    2. Check soil for sclerotia
  4. Symptom

    Silvery-grey speckles on leaves, leaves stunted.

    Possible causes
    1. thrips
    First checks
    1. Examine leaves for small insects or feeding marks
  5. Symptom

    Plants wilt, larval damage to bulbs and roots.

    Possible causes
    1. onion_fly
    First checks
    1. Examine soil around plants, look for maggots
Prevention strategy
Cultural
  1. Strict crop rotation (min. 3-4 years break after Allium).
  2. Selection of healthy, certified planting material.
  3. Optimal site selection (sunny, sheltered from wind).
  4. Soil improvement (loose, well-draining, humus-rich).
  5. Avoidance of waterlogging.
  6. Mulching for moisture regulation and weed suppression.
  7. Promotion of soil health through organic matter.
Monitoring
  1. Regular monitoring of plants for early signs of pests or diseases.
  2. Use of yellow sticky traps to monitor fly infestation.
  3. Visual inspection of leaves and bulbs.
Organic first response
  1. For pests: Spray with water, use beneficial insects (predatory mites, lacewings).
  2. For fungal diseases: Plant extracts (e.g., horsetail), copper preparations (use sparingly).
  3. Remove and dispose of infested plant parts immediately.
Notes

Prevention is key to successful shallot cultivation. A combination of good horticultural practice and targeted measures is most effective.

Diagnosis
Diagnostic process

Start with a visual inspection of the entire plant, including leaves, stems, and bulbs. Look for discoloration, spots, deformities, or signs of feeding. Examine the soil around the plant for pests or fungal mycelia. Consider the growing conditions (temperature, humidity, light) and recent care practices.

Common issues checklist
  1. IssueYellow leaves
    Possible causes
    1. Nitrogen deficiency
    2. Downy mildew
    3. Onion fly (larval damage)
    4. Thrips
  2. IssueWilting plants
    Possible causes
    1. Onion fly
    2. Fusarium rot
    3. White rot
    4. Drought
  3. IssueDeformed bulbs
    Possible causes
    1. Nematodes
    2. Fusarium rot
  4. IssueSpots on leaves
    Possible causes
    1. Downy mildew
    2. Thrips
  5. IssueFungal growth on soil/bulb
    Possible causes
    1. White rot
    2. Fusarium rot
Further steps

If uncertain or with severe infestation: Consult a local garden expert or agricultural advisory service. Submit samples for analysis if necessary.

Phenology
Stages
  1. Germination
  2. Leaf growth
  3. Bulb formation
  4. Maturation
  5. Dormancy
Notes

Shallots are biennial but are usually cultivated as annuals. Bulb formation and maturation occur in the first year.

Flowering pollination

Shallots can flower in their second year if overwintered. The flowers are spherical and whitish to pink. Pollination is carried out by insects.

Harvest

Shallots are harvested in summer, typically in July or August, as soon as the leaves begin to wither.

Harvest details
Harvest frequency

Single harvest per crop cycle.

Harvest indicators
  1. Withered and falling leaves
  2. Woody or dry leaf base
  3. Well-formed, firm bulbs
Post harvest handling

After harvesting, let the shallots dry in a well-ventilated, dry place for 1-2 weeks until the necks and skins are dry. Sort out damaged bulbs.

Storage

Well-dried shallots can be stored cool, dark, and well-ventilated.

Storage details
General storage category

Cool and dry

Storage life

Several months (3-6 months, depending on variety and storage conditions).

Processing options
  1. Drying
  2. Pickling in vinegar or oil
  3. Freezing (after blanching)
  4. Candying
Processing use

Shallots can be dried, pickled, frozen, or processed into pastes. They are also suitable for candying.

Kitchen usage

Shallots are an important aromatic vegetable in the kitchen. They are used raw in salads, cooked in sauces, soups, stews, and as a side dish. Their fine, mild flavor is less pungent than that of onions.

Safety and edibility
Edible parts
  1. Bulb
  2. Leaves (young shoots)
Inedible or caution parts
Toxicity notes

Shallots are non-toxic and safe for consumption.

Raw consumption

The bulbs can be consumed raw, but are milder than onions. Young leaves can also be used raw or cooked.

Seed saving

Seeds can be obtained from plants that flower in their second year. It is important to use isolated plants to avoid cross-contamination, as shallots cross-pollinate easily.

Seed saving advanced

For seed production, only healthy plants that have not bolted should be overwintered. To ensure varietal purity, isolation of at least 500 meters from other Allium species is necessary. The seeds remain viable for only a few years.

Woody crop details
Rootstock relevancenot_applicable
Renewal pruning relevancenot_applicable
Notes

Shallots are not woody plants and therefore have no specific details for this category.

Ecology
Pollinator valuelow
Wildlife valuelow
Biodiversity notes

While shallots themselves do not have high ecological significance, their cultivation in naturalistic gardens can contribute to diversity by providing habitat for beneficial insects when they flower.

Practical notes
  1. TitleSite Selection
    ContentChoose a sunny, wind-sheltered spot with loose, well-draining soil. Absolutely avoid waterlogging.
  2. TitleSowing/Planting
    ContentSow directly outdoors in spring (March-April) or plant small bulbs/sets. Spacing approx. 10-15 cm in the row, 20-30 cm between rows.
  3. TitleCare
    ContentRegularly hoe and remove weeds. Water during dry spells, but avoid waterlogging. Fertilize only if necessary with organic fertilizer.
  4. TitleHarvest
    ContentWhen the leaves wither (July-August), carefully pull the shallots from the soil.
  5. TitleDrying and Storage
    ContentLet the harvested shallots dry in an airy, dry place until the necks are dry. Store cool, dark, and well-ventilated.
  6. TitleCompanion Planting
    ContentGood neighbors include carrots, lettuce, strawberries, and herbs. Avoid cabbage and beans.
  7. TitlePest and Disease Prevention
    ContentStrict crop rotation (at least 3-4 years break after other Allium species). Healthy plants and good hygiene are important.
Seasonal content
Spring

Spring is the time for sowing and planting. Ensure well-prepared soil and protect young plants from late frosts.

Summer

Summer is focused on growth. Ensure adequate watering and weed control. Harvest begins towards the end of summer.

Autumn

After harvest, proper drying and storage are crucial. Tidy up beds and prepare them for the next season.

Winter

Shallots are dormant during winter. Check storage conditions and plan for the next gardening season.