How to grow gerbera
Overview
Gerbera jamesonii is a herbaceous perennial grown for its large, colourful daisy-like flowers. It is a popular cut flower and garden plant that thrives in full sun and well-drained soil. Keeping the crown above soil level is critical to prevent rot.
Varieties
- Gerbera jamesonii 'Garvinea' — Hardy series with strong stems, ideal for Australian gardens.
- Gerbera jamesonii 'Sweet Dream' — Compact variety with pastel colours, good for pots.
Soil Preparation
Gerbera prefers slightly acidic soil (pH 6.0–6.5) with good drainage. Amend heavy clay with sand or organic matter. Add a slow-release fertiliser at planting for steady growth.
Growing Guide
Plant gerbera in full sun with well-drained soil, spacing 30–40 cm apart. Set the crown slightly above the soil surface to avoid rot. Water at the base to keep foliage dry and reduce disease. Mulch lightly to retain moisture but keep it away from the crown.
Sowing
Sow gerbera seeds 3–5 mm deep in seed-raising mix, keeping moist at 20–25°C. Germination takes 10–14 days. Transplant seedlings when 3–4 true leaves appear. Direct sowing is less reliable; use punnets for best results.
Care
Feed every 4–6 weeks with a balanced liquid fertiliser during active growth. Remove spent flowers and old leaves at the base to encourage new blooms. In cooler zones, mulch heavily or lift crowns for winter storage.
Companion Planting
Pair gerbera with roses, lavender, and salvia for a vibrant flower bed. Avoid planting near aggressive spreaders like mint or invasive grasses that compete for root space.
Common Pests & Risks
Aphids and spider mites can attack gerbera; spray with neem oil or insecticidal soap. Crown rot and powdery mildew occur in wet conditions; improve air circulation and avoid overhead watering. Remove infected leaves promptly.
Harvesting
Harvest gerbera flowers when the outer petals are fully open and the centre is firm. Cut stems early in the morning and place in water immediately. Remove lower leaves to keep vase water clean.
Troubleshooting
Yellow leaves: overwatering or poor drainage; reduce water and improve soil. Brown leaf edges: low humidity or salt buildup; flush soil and increase air moisture. Crown rot: crown planted too deep; replant with crown above soil. Stunted growth: lack of nutrients; feed with balanced fertiliser. Powdery mildew: poor air circulation; space plants wider and avoid wetting leaves.