TomatilloPhysalis philadelphica

Tomatillo

Tomatillos

1. Physalis ixocarpa
2. Physalis philadelphica subsp. ixocarpa

1. Tomatillo
2. Physalis philadelphica
3. Physalis ixocarpa
4. Mexican husk tomato
5. Husk tomato

1. Physalis ixocarpa
2. Mexican husk tomato
3. Husk tomato

1. Tomatillo
2. Physalis philadelphica
3. Physalis ixocarpa
4. Mexican husk tomato
5. Husk tomato

Nightshade family

1. Solanum lycopersicum
2. Capsicum annuum
3. Solanum melongena
4. Physalis peruviana

1. Fruit

1. Tasksow_indoor

   Label

   Pre-cultivate indoors

   Priorityhigh

   Months

   1. 3

   Conditionwarm, bright location

   Estimated effortmedium

   Notes

   Sow seeds 0.5-1 cm deep in seed-starting mix, germinate at 20-25°C.

1. Tasksow_indoor

   Label

   Continue indoor pre-cultivation

   Prioritymedium

   Months

   1. 4

   Conditionwarm, bright location

   Estimated effortmedium

   Notes

   Place young plants in a bright, warm spot; prick out if necessary.

1. Taskharden_off

   Label

   Harden off plants

   Priorityhigh

   Months

   1. 5

   Conditionno frost risk

   Estimated effortmedium

   Notes

   Gradually acclimate plants to outdoor temperatures and sun.

2. Taskprepare_bed

   Label

   Prepare garden bed

   Prioritymedium

   Months

   1. 5

   Conditionsoil workable

   Estimated effortmedium

   Notes

   Loosen soil and enrich with compost.

1. Taskplant_out

   Label

   Plant out to garden

   Priorityhigh

   Months

   1. 6

   Conditionafter last frost, soil warm

   Estimated effortmedium

   Notes

   Plant with sufficient spacing (60-80 cm) and water well. Install supports.

2. Taskwater

   Label

   Water regularly

   Prioritymedium

   Months

   1. 6

   Conditiondry weather

   Estimated effortlow

   Notes

   Ensure consistent moisture, especially after planting out.

1. Taskwater

   Label

   Water regularly

   Priorityhigh

   Months

   1. 7

   Conditiondry weather, fruit development

   Estimated effortlow

   Notes

   Water requirements are high during fruit development.

2. Taskfertilize

   Label

   Fertilize

   Prioritymedium

   Months

   1. 7

   Conditionfirst fruit set

   Estimated effortlow

   Notes

   Apply a balanced liquid fertilizer or compost tea.

3. Tasksupport

   Label

   Support plants

   Prioritymedium

   Months

   1. 7

   Conditionplants growing tall

   Estimated effortlow

   Notes

   Bushy plants often require additional stakes or cages.

4. Taskharvest

   Label

   First harvest

   Prioritylow

   Months

   1. 7

   Conditionhusks split

   Estimated effortlow

   Notes

   Harvest first ripe fruits when the husk splits and the fruit underneath is firm.

1. Taskwater

   Label

   Water regularly

   Priorityhigh

   Months

   1. 8

   Conditiondry weather, fruit development

   Estimated effortlow

   Notes

   Consistent moisture is crucial for good yields.

2. Taskfertilize

   Label

   Fertilize

   Prioritymedium

   Months

   1. 8

   Conditionongoing fruiting

   Estimated effortlow

   Notes

   Continue fertilizing every 2-4 weeks.

3. Tasksupport

   Label

   Support plants

   Prioritymedium

   Months

   1. 8

   Conditionheavy fruit load

   Estimated effortlow

   Notes

   Provide additional support for heavy, fruit-laden branches.

4. Taskharvest

   Label

   Main harvest

   Priorityhigh

   Months

   1. 8

   Conditionhusks split

   Estimated effortmedium

   Notes

   Harvest ripe fruits regularly to encourage further production.

1. Taskwater

   Label

   Reduce watering

   Prioritylow

   Months

   1. 9

   Conditioncooler weather

   Estimated effortlow

   Notes

   Check water needs in cooler temperatures and reduce watering.

2. Taskharvest

   Label

   Continue harvest

   Priorityhigh

   Months

   1. 9

   Conditionhusks split

   Estimated effortmedium

   Notes

   Harvest for as long as possible, until the first frost threatens.

1. Taskharvest

   Label

   Last harvest before frost

   Priorityhigh

   Months

   1. 10

   Conditionfirst frost imminent

   Estimated effortmedium

   Notes

   Harvest all remaining fruits before the first frost. Unripe fruits can ripen indoors.

2. Taskclear_bed

   Label

   Clear garden bed

   Prioritymedium

   Months

   1. 10

   Conditionafter harvest

   Estimated effortmedium

   Notes

   Remove plant debris and prepare the bed for the next season.

Full sun

Sheltered

Sensitive to strong winds

Flat to gentle slope

South or southwest facing

Benefits from warm microclimates, e.g., in front of a south-facing wall or in sheltered corners.

1. Loamy sand
2. Sandy loam
3. Humus-rich garden soil

High

Well-drained

Loose, crumbly

Deep, nutrient-rich, and well-drained soil with high organic matter content is ideal.

Regular and consistent

At the base, drip irrigation

Tap water is sufficient

Avoid wetting the foliage to prevent fungal diseases. Ensure adequate water supply, especially during fruit development.

Balanced organic fertilizer, later high in potassium and phosphorus

Every 2-4 weeks after fruit set

Annually before planting

Moisture retention, weed suppression, nutrient release

Incorporate plenty of compost or well-rotted manure into the soil before planting. Fertilize regularly during the growing season.

Tomatillos are members of the nightshade family. Crop rotation with other plant families is important to prevent soil depletion and diseases.

1. Tomatillos belong to the nightshade family (Solanaceae).
2. Do not plant tomatillos after other nightshade crops (tomatoes, potatoes, peppers, eggplants).
3. Maintain a crop rotation break of at least 3-4 years before growing tomatillos or other nightshades in the same bed.

1. Legumes (peas, beans)
2. Brassicas (cabbage, broccoli)
3. Leafy greens

1. Tomatoes
2. Potatoes
3. Peppers
4. Eggplants
5. Other Physalis species

1. Root vegetables (carrots, radishes)
2. Leafy greens
3. Onions and garlic

Nightshade family

Good crop rotation helps reduce soil-borne diseases and pests and maintains soil health.

1. Slugnitrogen_deficiency

   NutrientNitrogen

   Name

   Nitrogen Deficiency

   Symptoms

   1. General yellowing of leaves, starting with older leaves
   2. Stunted growth
   3. Poor fruit set

   Causes

   Nutrient-poor soil, leaching by heavy rainfall, insufficient fertilization.

   Remedy

   Fast-acting nitrogen fertilizer (e.g., horn meal, nettle slurry) or compost.

2. Slugphosphorus_deficiency

   NutrientPhosphorus

   Name

   Phosphorus Deficiency

   Symptoms

   1. Dark green to purplish discoloration of leaves, especially on undersides
   2. Stunted root growth
   3. Poor flowering and fruiting

   Causes

   Cold, wet soil, acidic soil, phosphorus fixation in soil.

   Remedy

   Phosphorus-rich fertilizer (e.g., bone meal, rock phosphate) or compost.

3. Slugpotassium_deficiency

   NutrientPotassium

   Name

   Potassium Deficiency

   Symptoms

   1. Yellow-brown margins on older leaves (leaf margin necrosis)
   2. Weak stems
   3. Poor fruit quality

   Causes

   Light, sandy soils, high nitrogen applications, insufficient potassium supply.

   Remedy

   Potassium-rich fertilizer (e.g., wood ash, potassium sulfate) or compost.

As heavy feeders, tomatillos require a balanced nutrient supply. Deficiencies often occur with inadequate soil preparation or fertilization.

1. Slugpoor_fruit_set

   Name

   Poor Fruit Set

   Description

   Plants flower, but few or no fruits develop.

   Causes

   1. Lack of pollination (tomatillos require cross-pollination, at least two plants)
   2. Extreme temperatures (too hot or too cold)
   3. Nutrient imbalance (too much nitrogen)

   Solutions

   1. Plant multiple plants
   2. Attract pollinators (flowers)
   3. Manual pollination
   4. Balanced fertilization
2. Slugfruit_drop

   Name

   Fruit Drop

   Description

   Young fruits fall off the plant before ripening.

   Causes

   1. Water deficiency or excess
   2. Extreme temperature fluctuations
   3. Nutrient deficiencies
   4. Pest infestation

   Solutions

   1. Consistent watering
   2. Protection from extreme temperatures
   3. Balanced fertilization
   4. Pest control
3. Slugsplitting_husks

   Name

   Splitting Husks

   Description

   The papery husk around the fruit splits open before ripening.

   Causes

   Inconsistent watering, rapid growth spurts.

   Solutions

   1. Consistent watering
   2. Mulching for moisture regulation

Many tomatillo problems are due to environmental stress or inadequate care and can be avoided by optimizing growing conditions.

1. Sucking insects (Aphids, Whiteflies, Spider Mites)

1. Fungal diseases (Early Blight, Powdery Mildew, Wilts)

1. Practice crop rotation to avoid soil-borne diseases.
2. Ensure adequate plant spacing for good air circulation.
3. Provide consistent watering, avoid waterlogging and wetting foliage.
4. Enrich soil with compost and organic matter for healthy plants.
5. Regularly inspect for pests and diseases to intervene early.
6. Strengthen plants through balanced fertilization and optimal site conditions.

When problems arise, first check growing conditions (water, nutrients, site), as many symptoms are due to stress.

1. Slugearly_blight

   Severitymedium

   Conditions

   1. Humid and warm conditions
   2. Plant stress

   Affected parts

   1. Leaves (older first)
   2. Stems
   3. Fruits

   Prevention

   1. Crop rotation
   2. Good air circulation
   3. Avoid wetting foliage
   4. Mulching

   Organic control

   1. Remove affected plant parts
   2. Organic copper-based fungicides (for severe cases)
2. Slugpowdery_mildew

   Severitymedium

   Conditions

   1. Dry, warm days and cool, humid nights
   2. Poor air circulation

   Affected parts

   1. Leaves
   2. Stems

   Prevention

   1. Good air circulation
   2. Adequate plant spacing
   3. Resistant varieties

   Organic control

   1. Remove affected leaves
   2. Milk-water spray
   3. Sulfur-based treatments

1. Symptom

   Dark spots with concentric rings on older leaves, often with a yellow halo.

   Possible causes

   1. early_blight

   First checks

   1. Check humidity and temperature history
   2. Check plant spacing and ventilation
2. Symptom

   White, powdery coating on upper and lower leaf surfaces.

   Possible causes

   1. powdery_mildew

   First checks

   1. Improve air circulation
   2. Remove affected leaves

1. Germination
2. Seedling development
3. Vegetative growth
4. Flowering
5. Fruit set
6. Fruit development
7. Ripening

Tomatillos require a long and warm growing season to develop and ripen fruits. They are absolutely frost-sensitive.

Mid-summer to autumn (July to October)

Yellow with a dark center

Bell-shaped, small

The flowers are rather inconspicuous and are located in the leaf axils. They are pollinated by insects.

Mid-summer until first frost

1. 7
2. 8
3. 9
4. 10

Continuously over several weeks

Harvest begins as soon as the first fruits are ripe and continues until the first frost. Regular harvesting encourages further fruit production.

Every few days to weekly, depending on ripeness

1. The papery husk (calyx) splits open or changes color (yellowish, brownish)
2. The fruit completely fills the husk and is firm
3. The fruit color is typical for the variety (green, yellow, purple)

Harvest the fruits with their husks. The husk protects the fruit and extends its shelf life. Before use, remove the husk and wash off the sticky residue.

Cool and dry with husk

Refrigeration (with or without husk), Freezing, Canning

Unripe fruits can ripen in a warm place. Ripe fruits with their husks last longer.

Cool and dry

With husk at room temperature 2-3 weeks, in the refrigerator up to 2 months. Shorter without husk.

1. Freezing (whole or pureed)
2. Canning (salsa, sauces)
3. Drying (rarely)

Fresh consumption, Cooking, Pureeing

1. Salsa Verde
2. Sauces
3. Chutneys
4. Stews

Tomatillos are a staple in Mexican cuisine, especially for Salsa Verde. They can be used raw or cooked.

Fruiting vegetable

Tart, slightly citrusy, fresh, sometimes slightly resinous

Firm, juicy

1. Raw (in salads, salsas)
2. Cooked (roasted, grilled, stewed)
3. Pureed (for sauces)

1. Chilies
2. Cilantro
3. Onions
4. Garlic
5. Avocado
6. Lime

The sticky residue on the fruit after removing the husk is normal and should be washed off before use.

1. Ripe fruit

1. Husk (calyx)
2. Unripe fruits
3. Leaves
4. Stems

Like other nightshades, unripe fruits, leaves, and stems contain solanine-like alkaloids, which are toxic in larger quantities. Consume only ripe fruits.

Ripe fruits can be consumed raw.

Easy for open-pollinated varieties

Fermentation or simple washing

Air drying in a cool, dark place

Cool, dry, and dark in airtight containers

To obtain true-to-type seeds, adequate isolation from other tomatillo varieties or related Physalis species is required. Seeds can be cleaned by fermentation, similar to tomato seeds, to improve germination.

1. Growing multiple plants of one variety to ensure cross-pollination
2. Hand-pollination if necessary

Germination test on moist paper towel

For open-pollinated varieties, genetic stability is high if isolation is ensured. Hybrid varieties are not true-to-type.

Select fruits from healthy, vigorous plants that exhibit desired traits. Allow fruits to fully ripen until soft and the husk is dry and brownish before extracting seeds.

Tomatillo is an annual, herbaceous plant and is not cultivated as a woody crop. Therefore, these details are not relevant.

Tomatillos provide nectar and pollen for various insect pollinators, especially bees, contributing to local insect diversity in the garden.