Prunus domestica 'Blue Rock' (C/D)
plum 'Blue Rock'
A well-flavoured, very juicy, moderately sweet blue plum that produces regular, good crops on a neat tree. It's not self-fertile, so requires a pollination partner. Picking season is early to mid Aug . Free stone, firm flesh. Pollination group 1
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Size
Ultimate height
2.5–4 metresTime to ultimate height
5–10 yearsUltimate spread
2.5–4 metresGrowing conditions
Moisture
Moist but well–drained, Well–drainedpH
NeutralColour & scent
| Stem | Flower | Foliage | Fruit | |
| Spring | White | Green | ||
|---|---|---|---|---|
| Summer | Green | Blue | ||
| Autumn | ||||
| Winter |
Position
- Full sun
Aspect
South–facing or West–facing
Exposure
Sheltered Hardiness
H5Botanical details
- Family
- Rosaceae
- Native to the UK
- 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
How to grow
Cultivation
Keep a weed-free area of at least 60cm radius around trunk. Thin fruit if necessary. Irrigate in dry periods. Various training forms are possible, including fan-training
Propagation
Propagate by chip budding or grafting onto a clonal rootstock for fruit. The rootstock used largely determine the vigour of the tree
Suggested planting locations and garden types
- Cottage and informal garden
- Wildlife gardens
- City and courtyard gardens
- Edible fruit
- Wall side borders
Pruning
Pruning plums; regular pruning according to tree form. Annual pruning required for espaliers, cordons and pruning established fans
Pests
May be susceptible to aphids, 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
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