How to Care for Heather

Heather (Calluna vulgaris) is a low, evergreen shrub prized for its dense mats of tiny blooms and colorful foliage. It is a moderate-care plant that depends on acidic, well-drained soil and full sun to thrive.

Light

Plant Heather in full sun for the most abundant flowering and the richest foliage color. In too much shade the plants grow open and floppy, bloom sparsely, and lose the golden, bronze, or silvery tints that many cultivars develop. A minimum of six hours of direct sun daily is ideal.

Water

Heather likes moderate, even moisture in soil that is moist yet well-drained. Water regularly while establishing and during dry spells, keeping the root zone from drying out completely. Established plants tolerate short dry periods but resent both drought and standing water. Rainwater is preferable in hard-water areas.

Soil & Potting

Acidic soil is essential. Heather demands a low-pH, humus-rich, sharply drained medium and will not thrive in alkaline or heavy clay soils. Amend with ericaceous (acidic) compost and grit to improve drainage. In containers, use a dedicated ericaceous potting mix and ensure ample drainage.

Humidity & Temperature

Heather is hardy and suited to cool, temperate climates with open, airy conditions. It withstands cold winters and coastal wind well. It dislikes hot, muggy, stagnant air, so give it good air circulation. Moderate ambient humidity is fine as long as the foliage dries between rains.

Feeding

Feed sparingly. An annual light application of an acidifying, ericaceous fertilizer in spring is plenty. Heather is adapted to lean, acidic soils, and excess feeding produces soft, leggy growth and reduced flowering. Mulch with acidic organic matter to support steady nutrition.

Propagation

Propagate from semi-ripe cuttings in late summer, by layering low stems into the surrounding soil, or by dividing established clumps. Cuttings root best in a gritty, acidic, moist medium with high humidity. Layered stems can be separated once rooted the following season.

Repotting / Pruning

Repot container plants every couple of years into fresh ericaceous mix. The key maintenance task is annual pruning: after flowering, shear off the spent blooms and lightly trim the current season's growth to keep the plant compact and dense. Never cut back into old, leafless wood, as it rarely regrows.

Common Problems & Pests

Heather is generally sturdy but suffers in the wrong soil, where alkaline conditions cause yellowing (chlorosis). Poor drainage invites root rot and fungal dieback, seen as browning patches. Ensure sharp drainage, correct low pH, and good airflow to prevent most issues. Pests are uncommon.

Seasonal Care Tips

Plant in spring or autumn. Water attentively through the first year and any summer drought. Shear lightly right after the flowers fade to maintain form. Refresh acidic mulch in spring and apply the light annual feed then. In cold regions the evergreen foliage provides winter color.