How to Grow Heather
Calluna vulgaris
Heather is an evergreen ground-cover shrub that provides year-round interest with colourful foliage and flowers. It requires acidic soil (pH 4.5-5.5) — it will not grow in chalk or lime. Plant 30 cm apart in well-drained, acidic soil in full sun. By combining summer-flowering Calluna with winter-flowering Erica carnea, you can have blooms for most of the year. Trim lightly after flowering but never cut into old bare wood. Heather is low-maintenance, drought-tolerant once established, and excellent for ground cover, rockeries, and containers with ericaceous compost.
Yearly Lifecycle
Care Essentials
Rarely needed. If growth is poor, apply an ericaceous fertiliser in spring. Avoid lime-based feeds which raise soil pH.
Watch For
- Heather beetle
- Root rot in waterlogged soil
- Phytophthora
- Grey mould in wet conditions
Companions
Rhododendron, Blueberry, Pieris, Dwarf conifers
Track your Heather care schedule — pruning, feeding, and seasonal tasks
Start planning freeCare Requirements
☀️ Light
Full sun essential
Heather needs full sun for the best flowering and foliage colour. It becomes leggy and flowers poorly in shade.
💧 Watering
Drought-tolerant once established; avoid waterlogging
Water newly planted heather during dry spells. Once established, heather is drought-tolerant. Avoid waterlogged soil which causes fatal root rot. Use rainwater if possible — tap water can be alkaline.
🌱 Fertilizing
Rarely needed; ericaceous feed if growth is poor
Heather thrives in poor acidic soil and rarely needs feeding. If growth is weak, apply a light ericaceous fertiliser in spring. Never use lime-based feeds.
✂️ Pruning
Trim lightly after flowering; never into old wood
Trim spent flower stems lightly after blooming. For Calluna, trim in spring; for winter Erica, trim after flowers fade. Never cut into old bare wood — heather will not regrow from it.
Growing Tips
Acidic soil is non-negotiable
Heather will not grow in alkaline or chalky soil. Test your soil pH before planting. If it is above 5.5, grow heather in containers with ericaceous compost instead.
Combine for year-round colour
Plant summer-flowering Calluna alongside winter-flowering Erica carnea for blooms in every season. Add foliage varieties with gold, orange, or red-tipped leaves for extra interest.
Trim after flowering
Lightly trim spent flower stems after blooming to keep plants compact. Never cut into old bare wood — heather will not regrow from it.
Pests & Diseases
Pest Heather Beetle
Identification: Small brown beetles (5-6mm) and dark larvae feeding on shoots; patches of brown dead foliage
- Pick off beetles and larvae by hand
- Maintain plant vigour with correct soil pH
- Rarely warranted in gardens; damage is usually localised
Pest Vine Weevil
Identification: Notched leaf edges from adult feeding; wilting and collapse from root-feeding larvae in pots
- Apply Heterorhabditis nematodes to compost in late summer
- Check root balls when repotting
- Drench containers with acetamiprid-based vine weevil killer
Disease Phytophthora Root Rot Phytophthora spp.
Symptoms: Yellowing foliage, wilting despite moist soil; roots blackened and mushy; plant collapses
Treatment: Remove and destroy affected plants; improve drainage before replanting
Prevention: Plant in well-drained acidic soil; avoid waterlogging; do not overwater container plants
Disease Grey Mould (Botrytis) Botrytis cinerea
Symptoms: Fuzzy grey fungal growth on stems and flowers in damp conditions; shoots die back
Treatment: Remove affected growth promptly; improve air circulation
Prevention: Ensure good spacing and airflow; avoid overhead watering
Log Heather in your garden — track growth, care, and harvests year after year
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