This genus of 7 species of shrubs in the family Ericaceae was named for Dr.Pehr Kalm, a botanist and explorer of the east coast of North America in the 1770s. Most species are evergreen and native to northeastern U.S.A., with a single species occurring in Cuba. They are grown for their attractive foliage and showy flowers, which range in color from pale pink to deep red. The leaves are smooth, opposite or alternate, deep green on the upper surface but paler on the underside, and occasionally stalkless. The attention-seeking flowers are bowl- or saucer-shaped and are generally borne in dense clusters, held well clear of the foliage. All make ideal border plants.
CULTIVATION
Kalmia species are at home in slightly acid peaty soil. Dappled shade under tall deciduous trees in a cool moist climate is ideal. Little pruning is necessary apart from the removal of spent flower clusters. Propagate from seed, which should be collected as soon as ripe and sown the following spring.
Top Tip
These plants are best suited to low-maintenance and informal garden schemes, where they can grow to their natural size and blooms can be best appreciated.
CULTIVATION
Kalmia species are at home in slightly acid peaty soil. Dappled shade under tall deciduous trees in a cool moist climate is ideal. Little pruning is necessary apart from the removal of spent flower clusters. Propagate from seed, which should be collected as soon as ripe and sown the following spring.
Top Tip
These plants are best suited to low-maintenance and informal garden schemes, where they can grow to their natural size and blooms can be best appreciated.
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