How to Grow American Plum
Prunus americana
American Plum is a tough, cold-hardy native tree or large shrub that blooms early with fragrant white flowers before the leaves emerge. Plant in full sun in any well-drained soil — it tolerates poor, dry, and clay soils remarkably well. It spreads freely by root suckers; remove these promptly if you want a single-stemmed tree, or let them spread for a wildlife thicket. Prune lightly in late winter. The small red-yellow plums are tart raw but excellent for jams and jellies, and highly attractive to birds and wildlife.
Yearly Lifecycle
Care Essentials
Apply a balanced fertiliser in early spring before bud break. Avoid high-nitrogen feeds which promote lush foliage at the expense of fruit.
Watch For
- Black knot fungus
- Plum curculio
- Aphids
- Brown rot
Pet Safety
Care Requirements
Light
Full sun
Requires at least 6 hours of direct sun daily. Tolerates partial shade but fruits poorly. Best sited in an open, sunny position.
Watering
Low once established; water young trees regularly
Water regularly for the first 1-2 seasons after planting. Established trees are drought-tolerant and need watering only in prolonged dry spells.
Fertilizing
Balanced feed in early spring
Apply a balanced granular fertiliser in early spring. Avoid excess nitrogen. Mulching with compost is sufficient in most years.
Pruning
Light pruning in late winter
Prune in late winter before bud break. Remove dead, damaged, crossing, and inward-facing branches. Keep pruning light.
Spacing
4m between trees
Allow at least 4m between plants at maturity. Suckers spread further, so allow additional buffer near paths, walls, or other plants.
Growing Tips
Control suckers early
American Plum spreads aggressively by root suckers. Mow or cut them promptly if you want to limit spread, or use them as natural rootstock grafting material.
Ideal wildlife plant
Early spring flowers are among the first available nectar sources. The fruit feeds birds, deer, and small mammals. Consider letting a natural thicket develop.
Very tough once established
Tolerates drought, poor soil, cold to -40°C, and exposed sites. Needs virtually no inputs once established beyond occasional pruning.
