How to grow elephant bush
Overview
Elephant bush (Portulacaria afra) is a succulent shrub or small tree from South Africa, grown as a culinary herb for its tangy, slightly sour leaves. It is drought-tolerant, frost-sensitive, and thrives in bright, well-drained conditions with minimal water.
Varieties
- Portulacaria afra 'Variegata' — A variegated form with cream-edged leaves, popular in Australian gardens for its ornamental appeal.
- Portulacaria afra 'Aurea' — A golden-leaved cultivar that adds a warm accent to succulent arrangements.
Soil Preparation
Elephant bush needs a slightly acidic to neutral pH (6.0–7.0) and extremely sharp drainage. Amend heavy clay with 50% coarse sand or pumice. Avoid organic-rich mixes that hold moisture; a cactus mix is ideal.
Growing Guide
Position elephant bush in a spot that gets morning sun and afternoon shade, especially in hot climates. Use a free-draining mix: 50% coarse sand or perlite with 50% quality potting soil. Space plants 30–50 cm apart for a hedge or 1 m for a specimen. Plant at the same depth as the pot; water in once, then let the soil dry completely before watering again. In cool districts, grow in a pot that can be moved indoors during frost.
Care
Feed with a balanced, low-nitrogen liquid fertiliser (e.g., 2-1-2) every 4–6 weeks during spring and summer. Prune regularly to maintain shape and encourage bushiness; remove any leggy or damaged stems. Repot every 2–3 years to refresh the soil.
Companion Planting
Elephant bush pairs well with other succulents like jade plant, aloe, and agave, and with drought-tolerant herbs such as rosemary and thyme. Avoid planting near moisture-loving plants like ferns or mint, which will demand too much water.
Common Pests & Risks
Mealybug and scale are the most common pests on elephant bush. Treat with a soft soap spray (1 tsp soap per litre water) applied weekly until clear. Overwatering can cause root rot, which attracts fungus gnats.
Harvesting
Harvest leaves individually or snip stems as needed once the plant is at least 20 cm tall. Leaves are best used fresh; they lose their tangy flavour when dried. For a continuous supply, harvest no more than one-third of the plant at a time.
In the Kitchen
Use fresh leaves in salads, stir-fries, or as a garnish for their lemony tang. Store harvested leaves in a sealed bag in the fridge for up to 5 days. Do not cook for long periods as the flavour fades.
Troubleshooting
Yellow leaves: overwatering or poor drainage — let soil dry out completely. Brown leaf edges: too much direct sun — move to part shade. Dropping leaves: cold stress or sudden temperature change — protect from frost. Leggy growth: insufficient light — move to a brighter spot. Soft stems: root rot from overwatering — cut back and repot in dry mix.