Prunus domestica 'Kirke's' (D)

RHS

Synonyms

Prunus domestica 'Kirkes Blue'

Fruit Edible Trees

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A late-season dessert plum with blue-black skin and sweet, juicy, yellow-green flesh. It is a fairly light cropper and needs a warm, sheltered position. It is self-sterile; pollination group 4

Position

Full sun

Soil Types

Loam, Sand

Max Height

2.5-4 metres

Max Spread

2.5-4 metres

Size

Time to Maturity: 5–10 years
Max Spread: 2.5-4 metres
Max Height: 2.5-4 metres

Growing Conditions

Loam Sand

Moisture: Moist but well–drained or Well–drained
pH: Acid or Neutral

Position

Full sun

Aspect: South–facing or West–facing
Exposure: Sheltered
Hardiness

Hardiness Ratings

All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets

H1A: under glass all year (>15C)
H1B: can be grown outside in the summer (10 - 15)
H1C: can be grown outside in the summer (5 - 10)
H2: tolerant of low temperatures, but not surviving being frozen (1 to 5)
H3: hardy in coastal and relatively mild parts of the UK (-5 to 1)
H4: hardy through most of the UK (-10 to -5)
H5: hardy in most places throughout the UK even in severe winters (-15 to -10)
H6: hardy in all of UK and northern Europe (-20 to -15)
H7: hardy in the severest European continental climates (< -20): H5

Colour & Scent

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Rosaceae
Native to GB/Ireland: No
Foliage: Deciduous
Habit: Bushy
Genus: Prunus can be deciduous or evergreen trees or shrubs with showy flowers in spring, and often good autumn foliage colour. Some have edible fruit in autumn, and a few species have ornamental bark
Name Status: Accepted
Horticultural Group

Horticultural Classification Codes

Horticultural Classification Codes are often given to genera which have a large number of species or cultivars. They are used to categorise cultivated plants based on specific, shared characteristics such as shape, colour, size or flowering time, and can be displayed as letters or numbers

For example:
Dahlia ‘Sunset Kate (Sin) = Single flower
Rosa ‘Marigold’ (HT) = Hybrid Tea: Dessert cherries are sweet and juicy and are best eaten picked fresh and raw

How to Grow

Cultivation

Grow in full sun in a sheltered position in moist, but well-drained soil, ideally with a pH of 6 to 6.5. Irrigate in dry periods. Thin fruit as required

Propagation

Propagate by chip budding or grafting. Trees grown from stones will not resemble the parent

Suggested planting locations and garden types

Cottage and informal garden
City and courtyard gardens
Wildlife gardens
Wall side borders
Edible fruit

Pruning

Regular pruning required according to tree form, see pruning plums and pruning established fans

Pests

May be susceptible to plum aphid, caterpillars, fruit tree red spider mite, brown scale, plum moth and bullfinches

Diseases

May be susceptible to peach leaf curl, silver leaf, bacterial canker, blossom wilt and honey fungus