How to Grow Mountain Laurel
Kalmia latifolia
Mountain Laurel is a slow-growing, long-lived evergreen shrub for acidic, well-drained soil in part shade. It thrives in cool woodland conditions under deciduous trees. Plant in autumn or spring, mulch deeply to keep roots cool and moist, and feed lightly with an ericaceous fertiliser in spring. Deadhead after flowering to improve next year's display. Never prune hard — recovery is very slow. All parts are toxic; handle with care around pets.
Yearly Lifecycle
Care Essentials
Spring with an ericaceous (acid) fertiliser. Avoid over-feeding — this slow-growing evergreen needs little nutrition.
Watch For
- Lace bugs
- Scale insects
- Powdery mildew
- Leaf spot
- Phytophthora root rot (in poorly drained sites)
Companions
Rhododendron, Azalea, Ferns, Hostas
Pet Safety
Care Requirements
Light
Part shade; dappled light under deciduous trees
Tolerates full sun in cool, moist climates but prefers dappled light or morning sun with afternoon shade. Deep shade reduces flowering. Ideal under open deciduous woodland.
Watering
Regular moisture; never waterlogged
Needs consistent moisture, especially in the first few years while establishing. Once established it is reasonably drought-tolerant. Always avoid waterlogging — root rot is the main killer.
Fertilizing
Light spring feed with ericaceous fertiliser
Apply a light dressing of ericaceous fertiliser in early spring. Over-feeding promotes leafy growth at the expense of flowers. Mulching with pine needles or composted bark is often enough.
Pruning
Deadhead after flowering; no hard pruning
Remove spent flower clusters immediately after bloom to redirect energy into next year's buds. Light shaping is fine right after flowering. Never hard prune — this slow-growing plant recovers very slowly.
Spacing
240 cm apart; 300 cm for large selections
Mountain Laurel spreads slowly over many years. Give it full space from planting. In naturalistic woodland settings slightly closer spacing creates a flowing thicket effect.
