How to Grow Bradley's King Damson

Wikimedia Commons

Bradley's King Damson

Prunus institia 'Bradley's King'

tree

Bradley's King Damson is a self-fertile damson plum variety known for producing abundant crops of small, dark purple fruit with excellent flavor for cooking and preserves. This vigorous, upright tree is hardy and reliable, making it a popular choice for home orchards. The fruit ripens mid to late season and stores well, making it ideal for jam and wine production.

When should you plant Bradley's King Damson in your zone?

Get a personalized planting timeline — when to start seeds, transplant, and harvest — based on your USDA zone and local frost dates. Free to start.

Get my Bradley's King Damson timeline →

Example Bradley's King Damson timeline · Pittsburgh, PA (Zone 6b)

  1. Plant Bradley's King Damson

    Around Apr 17

    Near Pittsburgh's average last spring frost.

  2. Tend & protect

    Late spring–summer

    Watering, feeding, and pest-watch reminders.

  3. Harvest Bradley's King Damson

    Late summer into fall

    Before the first fall frost (≈ Nov 8)

Sample dates for Pittsburgh, PA. Sign up to get exact Bradley's King Damson dates for your own zip code.

Growing Conditions

☀️
Sun: Full sun, 6-8 hours daily minimum
💧
Water: Regular watering during growing season, approximately 1-1.5 inches per week. Reduce watering after fruit set. Drought-tolerant once established but prefers consistent moisture during fruit development.
📏
Spacing: 240 inches
📅
Days to maturity: 3-4 years from planting to first substantial crop; 5-6 years to full productivity
🌱
Planting depth: Plant bare-root trees at same depth as in nursery; container trees at soil line. Graft union should be 4-6 inches above ground.

Soil

Type: Well-draining loamy soil, tolerant of clay soils
pH: 6.0-7.0
Amendments:
Compost Well-rotted manure Peat moss or coconut coir if drainage is poor

Growing Zones

Find your zone →

Zones 4-8, with best performance in zones 5-7

3b 4a 4b 5a 5b 6a 6b 7a 7b 8a

Sign up free to see if Bradley's King Damson grows in your zone — and get a personalized planting timeline.

Get my Bradley's King Damson timeline →

Growth Stages

1

Establishment (Year 1)

12 months

Young tree focuses on root development and framework growth with limited branching and leaf production.

Water consistently, stake for support in windy locations, remove flower buds first year to encourage tree development, apply mulch around base.

2

Juvenile Growth (Years 2-3)

24 months

Tree develops main scaffold branches and begins to fill out its form; occasional flowering may occur.

Prune to establish open center or modified leader form, thin congested growth, continue regular watering and mulching, allow light fruiting to begin in year 3.

3

Flowering

2-3 weeks in spring

White flowers with pink tinges bloom in clusters along branches in early spring before leaf emergence.

Protect blossoms from late frosts with frost cloth if necessary, ensure pollinator access (damson is self-fertile but benefits from pollinators), do not fertilize heavily to avoid excessive vegetative growth.

4

Fruiting & Development

8-10 weeks

Small green fruit develops and gradually enlarges; fruit remains green until late summer when it transitions to dark purple.

Thin fruit to 2-3 inches apart for larger individual plums, maintain consistent watering, apply balanced fertilizer mid-summer, monitor for pests and diseases.

5

Harvest & Dormancy

2-3 months harvest period; dormancy through winter

Fruit reaches full dark purple color in late August to September; leaves yellow and drop in fall, tree enters winter dormancy.

Harvest when fruit yields slightly to pressure, do not pick too early or flavor will be tart, prune after harvest to remove diseased wood and shape tree, apply dormant oil spray in late winter.

Companion Planting

Plan your garden →

Plant with:

Hazelnut Chives Borage Comfrey Aromatic herbs (thyme, oregano, rosemary)

Avoid planting near:

Walnut trees (produce juglone toxin) Brassicas at the immediate base Other stone fruits in very close proximity (disease spread)

Common Pests

  • Apply kaolin clay spray before flowering, remove and dispose of infested fruit, use insecticidal soap in early summer, maintain tree vigor

  • Apply neem oil or spinosad in late spring, use pheromone traps to monitor population, harvest promptly, remove mummified fruit from tree and ground

  • Apply organic insecticides at petal fall stage, thin damaged fruit, use sticky traps, encourage parasitic wasps

  • Prune out infected branches, improve air circulation through pruning, remove mummified fruit, apply sulfur fungicide in wet conditions, avoid overhead watering

  • Prune out black knots during dormancy well below the knot, destroy prunings, maintain tree health, apply dormant oil in winter

Uses

🍳

Damson Jam & Preserves

Culinary

Bradley's King damson is prized for jam and jelly production due to its high pectin content and excellent flavor balance. The fruit makes thick, richly flavored preserves and is essential for traditional damson cheese and damson paste. [source]

🍳

Sloe Gin & Spirits

Culinary

These damsons are used to create damson gin, damson wine, and other alcoholic beverages. The small fruit is ideal for infusion in spirits and produces a distinctive, slightly astringent flavor highly valued in traditional British beverages. [source]

💊

Digestive & Laxative Properties

Medicinal

Damson plums have traditionally been used to aid digestion and have mild laxative properties due to their fiber content and sorbitol. The fruit can help promote healthy digestion and regular bowel function. [source]

🏠

Natural Dye Production

Household

Damson fruit and leaves have been historically used to create purple and blue natural dyes for textiles and crafts. The rich pigment in the fruit skin makes it valuable for eco-friendly dyeing projects. [source]

🦋

Pollinator & Wildlife Support

Wildlife

The spring blossoms provide early nectar and pollen for bees and butterflies, while the fruit feeds birds and small mammals in late summer. Damson trees are valuable for supporting pollinators and wildlife in orchards. [source]

This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.

Harvest Tips

Harvest in late August to September when fruit is fully dark purple and yields slightly to gentle pressure. Pick fruit directly from branches or allow to drop and collect daily. The fruit ripens over several weeks, allowing multiple harvests. Bradley's King damson is best used cooked (not fresh eating) for jams, jellies, wines, gin, or compotes. Fruit stores well in refrigeration for 3-4 weeks and freezes excellently for later processing.

Fun Facts

  • 🌱 Bradley's King Damson is self-fertile, meaning a single tree will produce fruit without requiring a cross-pollinator, though pollinator presence increases yields.
  • 🌱 Damson plums are named after the city of Damascus and have been cultivated for over 2,000 years, with documented use in European orchards since medieval times.
  • 🌱 The fruit has a distinctive, tart flavor when raw but transforms into complex, rich sweetness when cooked, making it far superior for preserves than fresh eating compared to dessert plum varieties.

Gardening Terms

New to gardening? Learn about terms used in this guide:

Join 30,000 gardeners planning their gardens with LizPlants.

Get your personalized Bradley's King Damson planting timeline

Tell us your zip code and we'll calculate exactly when to start Bradley's King Damson seeds, transplant seedlings, and harvest — based on your USDA zone and local frost dates. Includes calendar reminders and printable task lists. Free to start.

Get my Bradley's King Damson timeline →