How to Grow King of the Damsons
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King of the Damsons
Prunus domestica subsp. insititia 'King of the Damsons'
treeKing of the Damsons is a heritage damson plum tree renowned for producing abundant crops of dark purple, flavorful fruits. It's a vigorous, self-fertile variety that's ideal for traditional jam-making and culinary use. This classic British cultivar has been grown for centuries and remains a favorite among home gardeners.
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Example King of the Damsons timeline · Pittsburgh, PA (Zone 6b)
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Plant King of the Damsons
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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Harvest King of the Damsons
Late summer into fallBefore the first fall frost (≈ Nov 8)
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Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 5-8; most reliable in zones 6-7
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Get my King of the Damsons timeline →Growth Stages
Establishment
Year 1-2Young tree developing root system and framework branches; limited or no flowering
Stake for wind protection; prune to establish strong scaffold branches; water regularly; avoid heavy fertilizing
Young Production
Year 3-4Tree begins flowering and setting fruit; moderate crop yields
Thin fruit to 2-3 inches apart for larger damsons; thin flower clusters if overcrowded; maintain consistent watering
Full Production
Year 5-20+Mature tree flowering prolifically with abundant fruit set; dense canopy
Prune to maintain shape and improve air circulation; thin fruit early for quality; consistent watering essential
Flowering
2-3 weeks in springSpring blossoms in white/pale pink clusters along branches; appears before leaves fully emerge
Protect flowers from late frosts with row covers if needed; pollinate via bees (self-fertile but benefits from cross-pollination)
Fruit Ripening
8-10 weeks (typically July-September depending on region)Fruits develop from green to deep purple-black; flesh softens and sweetens; maximum flavor when fully mature
Monitor for pests; maintain steady moisture; harvest as fruits ripen sequentially over 2-3 weeks
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Remove fallen fruit; use pheromone traps; apply spinosad or neem oil at petal fall; encourage natural predators
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Thin fruit early; remove damaged fruitlets; apply insecticidal soap post-flowering; encourage parasitic wasps
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Spray with sulphur in early spring; maintain tree vigor; prune to improve air circulation
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Spray insecticidal soap in early spring; strong water spray removes aphids; encourage ladybugs and parasitic wasps
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Remove mummified fruits; prune out infected twigs; thin fruit to improve air circulation; avoid overhead watering
Uses
Jam and Preserves
CulinaryKing of the Damsons is the gold standard for damson jam, producing a rich, deep-colored preserve with excellent set due to natural pectin. The tart flavor and firm texture make it ideal for traditional British jam-making. [source]
Gin and Liqueurs
CulinaryDamsons are traditionally infused into gin or used to make damson cheese and liqueurs like Pimm's. The distinctive flavor creates elegant cordials and fortified drinks. [source]
Cooking and Sauce
CulinaryThese tart, flavorful fruits work well in sauces for game, pork, and poultry, as well as in compotes and desserts. Their complex flavor profile enhances savory dishes. [source]
Digestive Support
MedicinalDamsons are traditionally used in folk medicine for their laxative properties and are rich in fiber and antioxidants. Damson juice has been used to support digestive health. [source]
Pollinator and Wildlife Support
WildlifeThe early spring blossoms provide essential nectar for bees and other pollinators. Fallen fruit supports birds and small mammals. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Pick damsons when fully dark purple and slightly soft to touch, typically August-September. Harvest sequentially as they ripen rather than all at once. For jam-making, pick when fully ripe. Leave slightly unripe fruits on tree for fresh eating later. Use pruning hook or hand-pick to avoid bruising.
Fun Facts
- 🌱 King of the Damsons has been grown in British orchards for centuries and is believed to originate from areas around Worcestershire and Gloucestershire, becoming deeply embedded in English culinary tradition.
- 🌱 The name 'damson' likely derives from Damascus, though the fruits are thought to have originated in the Caucasus region; King of the Damsons represents the finest heritage cultivar of this ancient fruit.
- 🌱 A single mature King of the Damsons tree can produce 60-100 pounds of fruit in a good year, making it exceptionally productive for home jam-makers and preservers.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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