Prunus domestica subsp. insititia
fruitDamson is the traditional British cooking plum, a subspecies of European plum that produces small ovoid blue-black fruit with sweet-spicy-tart flesh and exceptionally high pectin content. The fresh flavor is too tart for most palates, but Damson transforms in cooking into the best plum jam, fruit cheese, and gin-infused liqueur (sloe gin substitute) imaginable. Extremely hardy and disease-resistant.
Sun
full sun
Water
Every 5 days
Harvest
~3 yrs
to first harvest
Difficulty
easy
Lifecycle
perennial
Comes back every year
Spacing
15-20 ft (semi-dwarf)
Planting Depth
Graft union 1-2 in above soil
Soil pH
6.0-7.0
Soil Type
Rich, well-draining
Hardiness Zones
Zones 4 – 7
When to Fertilize
Early spring; light feed only
Fertilizer
Compost; avoid heavy nitrogen
Plant in full sun on well-drained loam in zones 4 to 7. Set the graft union just above the soil line. Damson is self-fertile; one tree bears reliably. Train to an open vase with 3 to 4 main scaffolds; prune in late winter for airflow. Damson is one of the most low-maintenance stone fruits in the home orchard, tolerating heavier soils and cooler conditions than most plums.
Direct sow
Apr 15
Projected first harvest
Sep 7 · Year 4
Year 1
Good neighbors that attract beneficial insects or deter pests
Proactive ways to stop trouble before it starts — tap a name with an arrow for its full guide
Kaolin clay at petal fall; jar the trunk at dawn over a sheet; pick up early drops weekly
Cut out swollen galls 4 in below knots in dormant season; remove wild Prunus host trees nearby
Prune for airflow, remove mummies before bloom, pick fruit before it softens
Encourage ladybugs and lacewings; blast colonies with a sharp water spray
Damson ripens from late August into October depending on cultivar. Wait until the fruit is almost black with a soft waxy bloom and gives slightly under gentle thumb pressure. The fresh flavor is intensely sour; do not judge by raw taste. Cooked Damsons reveal their famous balance of sweet-tart-spicy flavor in jam, fruit butter, fruit cheese (a stiff jam pressed into molds), and traditional Damson gin (soak pricked fruit in gin with sugar for 3 months).
About 46 calories per 100 g fresh with 1.4 g fiber, 9.5 mg vitamin C, and 157 mg potassium. Damsons are particularly high in pectin (the natural gelling agent) and anthocyanins, which is what makes the cooked fruit set so beautifully into jam and gives it deep antioxidant value.
Eat the flesh, not the pit. The kernel inside the pit contains amygdalin, a cyanide-releasing compound - discard the pits and never eat or crush the seeds inside.
For educational and informational purposes only — HomeSown is not medical, health, or other professional advice. Always positively identify any plant before handling or eating it; some plants, and some parts of otherwise-edible plants, are toxic. Consult a qualified professional before consuming or otherwise using any plant, especially if you are pregnant, nursing, taking medication, or have a health condition.
Year 2
Year 3
Year 4