How to Grow Heathers and Heaths: Year‑Round Color for Acidic Soils

Heather vs. Heath: What’s the Difference?

Both belong to Ericaceae but are different genera: Calluna (heathers) and Erica (heaths). They share evergreen, low‑maintenance habits and similar cultural needs. Winter hardiness is the main distinction.

Must‑Know Facts About Heathers (Calluna vulgaris)

Over 500 cultivars, mostly summer‑blooming (white to deep purple), foliage green to fiery orange, small scalelike leaves. Low mounds or spreading mats. Hardy Zones 5–7 (Zone 3 with protection). The classic “ling” of Scottish Highlands.

True Heaths (Erica spp.)

700+ species/cultivars including winter heath (E. carnea), bell heath (E. cinerea), Darley Dale (E. x darleyensis), Cornish heath (E. vagans), cross‑leaved heath (E. tetralix). Wider color range, taller forms, some small trees. Hardiness varies widely: E. carnea blooms under snow; South African types need greenhouses. Needlelike leaves vs. heather’s flat, hairy leaves. Heaths have prominent corollas; heathers’ corollas are encased by the calyx—but only a botanist spots the difference.

Designing with Heathers and Heaths

Foliage color shifts with cold weather (e.g., ‘Firefly’ turns brick red in winter; ‘Dawn’ goes from red to gold). Kate Herrick of Rock Spray Nursery advises focusing on plant size and spacing rather than bloom color—the hues harmonize naturally. Mass plantings on slopes create Impressionist landscapes.

Landscaping with Heather

Evergreen foliage (green, yellow, bronze, red) shines in winter. Plant in open areas, hillsides, pathways. Pair with dwarf conifers (same acidic soil needs). Tolerate poor, rocky soil and salt spray—great for coastal sites. Heaths ~1′×1.5′; heathers ~2′×2–3′. Space at mature width, 2′ from other shrubs. For mass planting, multiply area by 0.44 (10×10′ = 44 plants).

Planting and Care

• Soil: Acidic pH 4.5–5.5. Amend with damp peat moss, especially if soil is neutral. For clay, build raised beds with topsoil, sand, composted bark/peat. For boggy soil, make a berm.
• Drainage: Critical—without it, they fail.
• Planting: Shear new plants for bushiness. Plant spring or early autumn. Water 2×/week for first months (moist, not soggy). Mulch with acidic material (pine straw, peat, leaf mold). After 2–3 years, drought‑tolerant.
• Spacing: At mature width for air circulation.
• Sun: Minimum 6 hours for best foliage color. South side best for red varieties. Afternoon shade in hot areas. Too much shade = leggy, dull plants.
• Winter: Avoid harsh wind exposure; use evergreen bough mulch if needed. Deep snow = fine.
• Fertilizer: Once at planting with rhododendron feed—then stop. Annual feeding harms more than helps.
• Pruning: Yearly shear in spring before buds set (or after bloom for winter bloomers). Calluna cut below old flowers; Erica lightly pruned for bushiness.

Heather Cultivars (Zones 5–7, ≤2′ tall)

‘Alba Rigida’ – white flowers, bright green, spreading, Zone 4 hardy.
‘Firefly’ – mauve flowers, brick red foliage, upright.
‘H.E. Beale’ – silver‑pink, bronze, double flower.
‘J.H. Hamilton’ – pink, dark green, double, dwarf.
‘Mrs. Pat’ – light purple, pink‑tipped foliage, year‑round color.
‘Spring Torch’ – mauve, yellow‑orange to pink‑cream tips.
‘Tenuis’ – lilac, dark green, Zone 4, early, low.
‘Tib’ – dark pink‑purple, dark green, double, long bloom.
‘Velvet Fascination’ – white, downy silver‑gray, upright.
‘Winter Chocolate’ – lavender, gold‑pink to bronze‑yellow, compact.

Heath Selections (generally 1′×1.5′, heat‑tolerant)

E. carnea ‘Bell’s Extra Special’ – purple‑red, gold‑flecked, Zones 5–7 (3 w/ protection).
E. cinerea ‘Velvet Night’ – purple‑black, dark green, Zones 6–8.
E. x darleyensis ‘White Perfection’ – white, bright green, Zones 7–8.
E. erigena ‘Irish Dusk’ – salmon pink, gray‑green, tolerates alkaline, Zones 8–9.
E. lusitanica – pinkish white, medium green, drought‑tolerant, Zones 8–10.
E. manipuliflora ‘Korcula’ – white tinged pink, gray‑green, heat/humidity tolerant, Zones 7–9.
E. tetralix ‘Pink Glow’ – magenta, gray‑green, boggy, acidic, Zones 5–7.
E. vagans ‘Mrs. D.F. Maxwell’ – rose pink, dark green, alkaline tolerant, Zones 7–9.
E. x watsonii ‘Pink Pacific’ – pink, red with gold, Zones 5–7.
E. x williamsii ‘P.D. Williams’ – rose‑lilac, gold‑tipped green, alkaline tolerant, Zones 5–7.

Rock Spray Nursery. Heaths and Heathers Nursery.