How to Grow Capsicum in Australia

Capsicums are warm-season crops that need a long frost-free growing season — typically 4–5 months from transplant to full-colour fruit. In cooler Australian climates, starting seeds indoors 8–10 weeks before the last frost is essential; in subtropical and tropical areas, seedlings can be planted into beds almost year-round with appropriate variety selection.

Sow seeds at 6–8mm depth in warm propagating mix (ideally with bottom heat — capsicum germinates best at 24–28°C soil temperature). Under cool conditions, germination can take up to three weeks; in warm conditions it takes 10–14 days.

Transplant hardened-off seedlings into the raised bed once daytime temperatures are consistently above 18°C and nighttime temperatures stay above 12°C. Plant at the same depth as the seedling was growing, and stake the plant immediately — capsicums become top-heavy when fruiting.

Capsicums share the same family and growing requirements as tomatoes and chillies, and they make excellent companions. Plant basil between capsicum plants for aphid deterrence and to attract pollinators.

Feed regularly with a balanced fertiliser during vegetative growth, then switch to a high-potassium fertiliser once flowering begins. In very hot weather (35°C+), flower drop is common — provide afternoon shade and water consistently. Capsicums are perennial in frost-free climates and can be kept productive for 2–3 years with proper pruning and feeding.