Pink Weeping Crabapple ( Malus ‘Louisa’), deciduous tree, to 15 feet in height, weeping growth habit, deep purplish red buds open to large, true pink flowers, blooms mid-spring, full sun to part shade, best with deep water twice monthly.
From North America, Europe and Asia, ornamental crabapples are valued for a brief, lavish display of white, pink, or red flowers and for fruit that is showy, edible, or both. Hundreds of different kinds are cultivated, and new varieties appear every year. Most grow about 20 ft. high, though sizes range from as low as 4 ft. to as tall as 35 ft. Leaves are pointed ovals, often fuzzy, varying in color from medium green to nearly purple. Fall foliage is rarely noteworthy.
Crabapples bloom in spring (usually before leaves unfurl), bearing masses of single, semidouble, or double flowers that sometimes have a musky, sweet scent. Small red, orange, or yellow apples, ranging from under ¾ in. to almost 2 in.wide, ripen from midsummer into autumn; in some varieties, the fruit hangs on well after leaves drop and even into winter. Some varieties bear both flowers and fruit more heavily in alternate years.
Plant bare-root trees in winter or early spring; set out container plants anytime. Best in fertile, well-drained, deep soils, these will also grow in rocky or gravelly ones. They take acidic to slightly alkaline soil. Flowering crabapples are hardier,more tolerant of wet soil, and longer lived than flowering cherries and other flowering stone fruits. Take heat but are not at their best in low desert. For optimal growth and productivity, plants need winter chill—about 600 hours at 45°F/7°C or lower.
Flowering crabapple varieties differ widely in disease resistance. Many of the most popular varieties of years past are highly prone to one or more of the diseases that can plague these trees: apple scab, cedar-apple rust, fireblight, powdery mildew. Today, the nursery trade places great emphasis on promoting disease-resistant varieties —thus displacing many of the old favorites. In the Pacific Northwest, it’s imperative to choose trees that resist cedar-apple rust, scab, and powdery mildew. Fireblight may afflict susceptible trees anywhere when conditions are favorable.
Flowering crabapples are subject to attack from the same pests that affect apple. Scale, aphids, spider mites, and tent caterpillars may require control; codling moths and apple maggots should be controlled if you intend to harvest the fruit. These are fine lawn trees, but their bark can easily be nicked by mowers, creating an entry point for diseases. Protect them by creating a sod-free,mulched area around the trunk. Or underplant with primroses, spring-blooming bulbs, or shade-loving bedding plants. Plant them near fences to heighten the screening effect. Prune only to build a good framework, remove any suckers, and correct the shape. Crabapple trees can be trained as espaliers.
Malus toringo sargentii
This broad, densely branched tree grows 10 ft. tall by 20 ft. wide, producing a profusion of small, fragrant, single white flowers followed by tiny, red, long-lasting fruits. Good disease resistance.
This round-headed hybrid grows 20 ft. tall and wide. Deep rose pink buds open to single flowers in a lighter rose pink; they’re followed by reddish purple fruit that hangs on well. Leaves emerge reddish maroon, turn dark green. High disease resistance.
To 15 ft. tall and wide, this has an irregular, weeping form. Small, single white flowers are followed by a heavy crop of bright red berries that hold well into fall. Moderate disease resistance. Named for the color of its heavy crop of berries, not for the rose-tinted buds that precede its white flowers.