How to grow tree aeonium
Overview
Tree aeonium (Aeonium arboreum) is a succulent shrub with branching rosettes of fleshy leaves, grown for its architectural form and seasonal colour. It thrives in part shade with minimal water and is frost-tender, needing protection in cooler districts.
Varieties
- Aeonium arboreum 'Atropurpureum' — Dark purple-bronze rosettes that colour up in full sun, popular in AU/NZ gardens.
- Aeonium arboreum 'Schwarzkopf' — Nearly black rosettes, very striking in pots and borders.
Soil Preparation
Tree aeonium needs a free-draining, slightly acidic to neutral soil (pH 6.0–7.0). Mix in coarse sand, pumice, or perlite at 30–50% of volume to improve drainage, and avoid adding organic matter that retains moisture.
Growing Guide
Plant tree aeonium in a free-draining mix of coarse sand, pumice, or perlite with loam, in a position that gets bright morning light but shade from harsh afternoon sun. Space rosettes 30–50 cm apart in pots or garden beds; avoid planting in heavy clay or low spots that hold moisture. Water only when the soil is dry to the touch, and reduce to near-dryness in winter to prevent rot.
Care
Feed with a balanced, low-nitrogen liquid fertiliser once in spring and again in autumn. Prune off spent flower stalks after bloom to encourage branching, and remove any rosettes that become leggy or damaged to maintain shape.
Companion Planting
Pair tree aeonium with echeveria, sedum, and other drought-tolerant succulents like graptopetalum or crassula for a cohesive, low-water display. Avoid planting near moisture-loving plants like ferns or impatiens that will keep the soil too damp.
Common Pests & Risks
Aphids and mealybugs can infest rosette crevices; treat with a spot of neem oil or insecticidal soap. Rot is the main disease risk, caused by overwatering or poor drainage—remove affected rosettes immediately and let the soil dry out.
Troubleshooting
Yellow leaves: overwatering or poor drainage—let soil dry out. Brown leaf tips: too much direct sun or heat stress—move to part shade. Leggy rosettes: insufficient light—shift to brighter spot. Rot at base: waterlogged soil—repot in fresh mix. Leaf drop: cold shock—protect from frost.