Flowering Plum

A compact ornamental tree with deep purple foliage that maintains its dramatic color throughout the growing season, complemented by pink spring blossoms. Purple-leaf plums provide striking color contrast in mixed borders and are among the first trees to bloom in late winter to early spring. They are relatively short-lived and prone to several fungal diseases, but their intense foliage color is hard to match with any other small tree. Prune after flowering to maintain shape and remove crossing branches.

Flowering plum seeds are contained in small stone fruits that ripen in summer. Collect fruit when fully colored and soft. Remove the fleshy pulp and clean the pit. Crack the hard pit slightly with pliers to aid water absorption, being careful not to damage the seed inside. Cold-stratify in moist peat at 35 to 40 degrees Fahrenheit for 90 to 120 days. Sow stratified seeds 1 inch deep in moist seedling mix in spring. Germination occurs in 3 to 6 weeks. Seedlings will have green foliage, as purple-leaf characteristics require grafting named cultivars onto seedling rootstock.

Purple-leaf flowering plum is one of the most popular small ornamental trees for year-round color interest. The deep burgundy-purple foliage provides a dramatic contrast to surrounding green-leaved plants from spring through fall. Choose a site with full sun, as shade causes the purple color to fade toward green. Plant in well-drained soil with a pH of 6.0 to 7.5. Space 15 to 20 feet apart for a natural look or closer for a screening hedge.

Plant container-grown or balled-and-burlapped trees in spring or fall. Set at grade level and water deeply at planting. Maintain consistent moisture during the first growing season, then water during extended dry periods. Apply 2 to 3 inches of mulch around the base.

Flowering plum blooms on old wood, producing pink to white flowers in late winter to early spring before leaves emerge. Prune immediately after flowering if shaping is needed. The tree develops a rounded to vase-shaped canopy and typically reaches 15 to 25 feet tall. Remove suckers that may sprout from the rootstock below the graft union, as these will produce green-leaved growth different from the purple cultivar above. Flowering plums are relatively short-lived, with a typical landscape lifespan of 15 to 25 years.

The dark purple foliage creates dramatic contrast when planted near trees and shrubs with chartreuse or golden foliage. Gold-leaved spireas, golden elders, and yellow-leaved hostas create eye-catching color combinations. White-flowering plants like gardenias, white roses, and white peonies stand out beautifully against the purple backdrop. Silver-foliaged plants like lamb's ears, artemisia, and lavender also complement the purple tones. Underplant with spring bulbs that bloom simultaneously with the plum's pink flowers.

Flowering plum adapts to a wide range of well-drained soils with a pH of 6.0 to 7.5. It tolerates clay, loam, and sandy soils if drainage is adequate. Avoid waterlogged conditions that promote root rot. Fertilize lightly in early spring with a balanced slow-release fertilizer. Excessive nitrogen causes rapid, weak growth and dilutes the purple foliage color. Mulch with 2 to 3 inches of organic matter to conserve moisture and regulate soil temperature. Top-dress with compost annually.

Ideal Temperature

Hardiness Zone Compatibility

Flowering plum produces small cherry-like fruits that are technically edible but usually too tart for fresh eating. Some varieties produce more palatable fruit that can be used for jams and jellies. Harvest fruit when it turns from green to deep purple-red and softens slightly. The primary ornamental value is the purple foliage, which can be cut for dramatic floral arrangements. Cut branches with mature foliage in summer or flowering branches in early spring for indoor display.

Storage & Preservation

Fresh flowering plum fruit is best used immediately for preserves, as it deteriorates quickly. For jam-making, wash and pit the fruit and cook with sugar and pectin as you would any stone fruit preserve. Cut flowering branches last 5 to 7 days in water. Purple foliage branches can be preserved with glycerin for long-lasting arrangements. Dried seed pits have been used ornamentally in some craft traditions.

Troubleshooting Common Problems

Short lifespan of 15 to 25 years is the primary limitation. Trees often decline with canker diseases, borer infestations, and root rot as they age. Rootstock suckers are a constant nuisance, producing vigorous green shoots from below the graft that can overtake the purple top growth if not promptly removed. Fruit drop creates a mess on sidewalks and patios, so fruitless varieties are preferred for these locations. Borers attack stressed trees, and severe infestations can be fatal. Purple foliage fades to green-bronze in heavy shade.

Growing Tips

1. Plant in full sun with at least 6-8 hours of direct sunlight daily for the best purple foliage color and heaviest flowering. Trees grown in partial shade produce greener, less vibrant leaves.
2. Choose a site with well-drained soil, as Prunus cerasifera is susceptible to root rot in waterlogged conditions. Sandy loam to clay loam soils with a pH of 6.0-7.5 are ideal.
3. Space trees 15-20 feet apart to allow for the mature spread of the rounded canopy and to ensure good air circulation, which reduces fungal disease pressure.
4. Water newly planted trees deeply twice per week for the first two growing seasons to establish a strong root system. Reduce to weekly deep irrigation once established.
5. Prune annually during late winter dormancy to maintain an open vase shape with 4-5 well-spaced scaffold branches. Remove water sprouts, suckers, and any inward-growing branches.
6. Apply a 3-4 inch mulch ring of wood chips or shredded bark from the drip line inward, keeping mulch at least 4 inches away from the trunk to prevent bark rot.
7. For improved fruit set, plant a second compatible pollinator tree such as another Prunus cerasifera cultivar, a Japanese plum, or a wild plum within 50 feet.
8. Monitor for common pests including aphids, tent caterpillars, and Japanese beetles. Treat aphids with a strong water spray or insecticidal soap before populations explode.
9. Watch for brown rot (Monilinia fructicola), the most common disease, by removing any mummified fruits from the tree and ground in fall to break the disease cycle.
10. In colder regions (zones 4-5), select cold-hardy cultivars like 'Newport' and protect young trees from sunscald by wrapping trunks with white tree wrap in late fall.