How to grow ice plant
Overview
Ice plant (Delosperma cooperi) is a mat-forming succulent perennial from South Africa, grown for its brilliant purple daisy-like flowers and fleshy, ground-hugging foliage. It thrives in hot, dry, poor soils and is ideal for rockeries and sunny slopes.
Varieties
- Delosperma cooperi — The classic purple-flowered form, hardy and free-flowering in Australian gardens.
- Delosperma 'Jewel of Desert' — Compact series with pink, orange, or yellow flowers; excellent for small pots.
Soil Preparation
Prefers neutral to slightly alkaline soil (pH 6.5–7.5). Must be extremely well-draining — add coarse sand, perlite, or fine gravel to heavy clay. Avoid any organic matter that retains moisture; a lean, mineral mix is best.
Growing Guide
Plant in full sun in sharply draining, sandy or gravelly soil. Space 25–30 cm apart for quick cover. Avoid any organic mulch near the crown; use pebbles or crushed rock instead. Water sparingly after establishment — let soil dry completely between drinks. Best planted in spring (temperate) or autumn (subtropical/mediterranean) to avoid extreme heat at establishment.
Care
Feed once in spring with a low-nitrogen, high-potassium succulent fertiliser. Prune back leggy stems after flowering to maintain a compact shape. Divide clumps every 2–3 years to rejuvenate and prevent woody centres.
Companion Planting
Pairs well with other drought-tolerant succulents like sedum, echeveria, and sempervivum. Also good with low-growing herbs such as thyme and oregano. Avoid planting near moisture-loving plants like ferns or impatiens.
Common Pests & Risks
Aphids may cluster on new growth; blast off with water or apply neem oil. Root rot is the main risk — caused by overwatering or poor drainage. Ensure soil is free-draining and avoid wetting the crown.
Troubleshooting
Yellowing leaves: overwatering or poor drainage — reduce water and check soil. Leggy growth: too much shade or overfeeding — move to full sun and stop fertiliser. Brown leaf tips: salt buildup from hard water — flush soil with rainwater. Stems rotting at base: crown kept wet — remove mulch and let dry. No flowers: not enough sun — relocate to full sun.