Sorbus domesticaSorbus domestica

Sorbus domestica

Sorbus domestica

1. service tree
2. service-tree
3. sorb tree
4. true service tree

1. service tree
2. service-tree
3. sorb tree
4. true service tree

1. Sorbus domestica

1. Tracheophyta
2. Magnoliopsida

Rose family

1. fruit

The service tree (Sorbus domestica) is a majestic, long-lived wild fruit tree native to Central Europe. Its fruits are only palatable after bletting and are traditionally processed into juice, jam, or fine brandies. As Germany's Tree of the Year in 1993, it is a valuable woody plant for biodiversity and an asset to larger gardens and traditional orchards.

The service tree prefers sunny, wind-protected locations with deep, calcareous soils. It is winter-hardy, but young shoots can be susceptible to late frost. Once established, it is relatively low-maintenance but requires additional watering during dry periods. Harvesting takes place after the first frost when the fruits become soft and palatable.

1. ConditionGartenbau

   Estimated effort20 Minuten

   Label

   Seed stratification

   Months

   1. 2

   Notes

   Cold germinator needs 8-12 weeks of cold.

   Prioritymedium

   Taskstratification

1. ConditionBoden frostfrei

   Estimated effort1 Stunde pro Baum

   Label

   Planting

   Months

   1. 3

   Notes

   Plant grafted trees; enrich planting hole with compost.

   Priorityhigh

   Taskplanting

1. ConditionBoden frostfrei

   Estimated effort1 Stunde pro Baum

   Label

   Planting

   Months

   1. 4

   Notes

   Water if dry.

   Prioritymedium

   Taskplanting

1. ConditionJungbaum

   Estimated effort30 Minuten pro Baum

   Label

   Shaping prune

   Months

   1. 5

   Notes

   Remove unwanted shoots; establish crown shape.

   Prioritymedium

   Taskpruning

1. ConditionTrockenheit

   Estimated effort20 Minuten pro Baum

   Label

   Watering

   Months

   1. 6

   Notes

   Mulching recommended.

   Priorityhigh

   Taskwatering

1. ConditionTrockenheit

   Estimated effort20 Minuten pro Baum

   Label

   Watering

   Months

   1. 7

   Notes

   Avoid extended drought.

   Priorityhigh

   Taskwatering

1. ConditionKann Erntezeitpunkt verkürzen

   Estimated effort10 Minuten

   Label

   Monitor fruit ripening

   Months

   1. 8

   Notes

   Fruits become palatable after first frost.

   Prioritymedium

   Taskmonitoring

1. ConditionNach Frost

   Estimated effort2 Stunden pro Baum

   Label

   Harvest

   Months

   1. 9

   Notes

   Pick after frost exposure.

   Priorityhigh

   Taskharvest

1. ConditionBoden frostfrei

   Estimated effort1 Stunde pro Baum

   Label

   Autumn planting

   Months

   1. 10

   Notes

   Protect young trees with leaf mulch.

   Prioritymedium

   Taskplanting

1. ConditionVor Frost

   Estimated effort1 Stunde pro Baum

   Label

   Planting

   Months

   1. 11

   Notes

   Apply winter protection (e.g., reed mat).

   Prioritylow

   Taskplanting

Full sun to partial shade

Wind-protected preferred

Heat-loving; sheltered position in wine-growing climate ideal.

Loamy, calcareous, deep

Lime-loving; prefers heavy, nutrient-rich soils.

Drip irrigation or watering at root zone

Young trees weekly, old trees during drought

Avoid waterlogging; mulching helps retain moisture.

Mature compost or horn shavings

Apply a handful of compost per m² in spring.

Liming every 2-3 years recommended.

Long-term planning required; plant as solitary tree in meadow orchard.

1. Aphids
2. Caterpillars
3. Spider mites

1. Fungal diseases (Powdery mildew, Rust)
2. Bacterial diseases (Fire blight)

1. Site-appropriate planting in well-drained, nutrient-rich soil.
2. Adequate watering, especially during dry periods.
3. Regular monitoring for pests and diseases.
4. Promotion of beneficial insects through diverse planting.
5. Pruning to promote tree health and air circulation.
6. Protection against browsing by wildlife for young trees.

Look for leaf discoloration, growth abnormalities, unusual coatings, or feeding damage. In case of suspected fire blight, consult experts immediately.

1. Slugaphids

   Severitylow

   Conditions

   1. Warm, dry periods
   2. Nitrogen excess

   Affected parts

   1. Young shoots
   2. Leaves
   3. Flowers

   Prevention

   1. Promote beneficial insects (ladybugs, lacewings).
   2. Balanced fertilization.

   Organic control

   1. Rinse with strong jet of water.
   2. Use neem oil or potassium soap solution.
2. Slugpowdery_mildew

   Severitylow

   Conditions

   1. Humid weather
   2. Poor air circulation

   Affected parts

   1. Leaves
   2. Shoots
   3. Fruits

   Prevention

   1. Sunny, airy location.
   2. Thinning prune for better ventilation.

   Organic control

   1. Remove affected parts.
   2. Spray with horsetail tea or sulfur preparations.
3. Slugfire_blight

   Severityhigh

   Conditions

   1. Warm, humid weather
   2. Open wounds

   Affected parts

   1. Flowers
   2. Young shoots
   3. Leaves
   4. Bark

   Prevention

   1. Choose resistant varieties (service tree is relatively resistant).
   2. Hygienic pruning practices.
   3. Immediately remove and destroy infected plants.

   Organic control

   1. No direct organic control possible; generously remove and destroy affected parts.
   2. Disinfect tools.
4. Slugcanker

   Severitymedium

   Conditions

   1. Humid weather
   2. Frost cracks
   3. Pruning wounds

   Affected parts

   1. Bark
   2. Branches
   3. Trunk

   Prevention

   1. Keep pruning wounds clean and treat if necessary.
   2. Mulch tree base to prevent frost cracks.

   Organic control

   1. Prune affected branches back to healthy wood.
   2. Treat wounds with tree wax or clay.

1. Symptom

   Curled, sticky leaves on shoot tips

   Possible causes

   1. aphids

   First checks

   1. Check undersides of leaves for small insects.
   2. Observe ant activity.
2. Symptom

   White, powdery coating on leaves and shoots

   Possible causes

   1. powdery_mildew

   First checks

   1. Check air circulation.
   2. Assess moisture conditions at the site.
3. Symptom

   Blackened, burnt-looking shoots and flowers

   Possible causes

   1. fire_blight
   2. late_frost_damage

   First checks

   1. Check symptoms for rapid progression.
   2. Check cut surface for reddish discoloration in wood (fire blight).
   3. Timing of damage (after frost event?).
4. Symptom

   Sunken, cracked bark areas with callus formation

   Possible causes

   1. canker
   2. frost_damage

   First checks

   1. Check pruning wounds or frost cracks as entry points.
   2. Moisture in the wound area.
5. Symptom

   Yellow leaves with green veins (chlorosis)

   Possible causes

   1. iron_chlorosis
   2. nutrient_deficiency

   First checks

   1. Check soil pH.
   2. Assess soil nutrient supply.

Accurate observation of symptoms and the environment is crucial for correct problem diagnosis. Consult an expert if unsure.

1. Flowering (May-June)
2. Fruit development (Summer)
3. Fruit ripening and bletting after frost (September-October)

Service tree fruits are only palatable after the first frost or artificial bletting, as they are very astringent and high in tannins before this process.

May to June

Insect pollination

Whitish

1. September
2. October

Hand-picking, often after fruits have fallen or by gently shaking the tree.

Fruits should only be harvested after the first frost when they have become soft and mellow (bletted). Before this, they are unpalatably astringent.

Annually, once the tree starts bearing fruit (after approx. 10-15 years).

1. First frost
2. Fruits become soft and brownish
3. Fruits fall from the tree

Harvested fruits should be processed promptly or stored in a cool, dry place to complete the bletting process if not fully ripened.

Cool and dry, ideally in a box with straw or sand.

After bletting, the fruits do not store for long and should be processed soon.

Cool and dry

A few days to 1-2 weeks after bletting.

1. Juicing
2. Preserving (jam, jelly)
3. Distilling (fruit brandy)
4. Drying

Processing into juice, jam, jelly, or fruit brandy.

1. Service tree wine
2. Service tree cider
3. Service tree brandy

The fruits are edible raw after bletting, but due to their high tannin content and acidity, they are usually processed.

Wild fruit, processing fruit

1. Jam
2. Jelly
3. Juice
4. Fruit brandy

Tart, slightly astringent, aromatic (after bletting).

The fruits are edible raw after bletting, but due to their acidity and tartness, they are more suitable for processing.

1. Fruit (after bletting)

1. Unripe/unbletted fruits
2. Seeds (in large quantities)

Unripe fruits are highly astringent and unpalatable. The seeds contain small amounts of cyanogenic glycosides, which can be harmful in large quantities.

Only palatable raw in small quantities after bletting; mostly recommended for processing.

Extract seeds from ripe fruits, clean them, and stratify (cold germinator).

Medium to high (due to stratification and long germination period)

Service tree is often propagated vegetatively (grafting) because sowing is lengthy and parental traits are not always faithfully inherited.

Cold germinator, requires 8-12 weeks of cold treatment (approx. 1-5°C) after a warm pre-treatment (approx. 2-4 weeks at 15-20°C) to break dormancy.

Seeds remain viable for 1-2 years when stored cool and dry.

Not always true-to-type from seed; can lead to variability. Grafting is preferred for propagating specific varieties.

1. Standardbaum
2. Halbstamm

The service tree is a slow-growing, long-lived tree cultivated as a standard or half-standard. It requires ample space and is ideal for traditional orchards or as a solitary tree.

The service tree is a valuable tree for biodiversity. Its flowers provide nectar and pollen for bees and other insects. The fruits serve as a food source for birds and small mammals. As a rare tree, it contributes to species diversity in cultivated landscapes.