How to grow fan flower
Overview
Fan flower (Scaevola aemula) is a low-growing, herbaceous perennial native to Australia, grown for its trailing habit and fan-shaped blue or purple flowers. It thrives in part shade with well-drained soil and is ideal for filling gaps in garden beds or spilling over pot edges.
Varieties
- Scaevola aemula 'Blue Wonder' — Compact, deep blue flowers; excellent for pots and hanging baskets in Australian gardens.
- Scaevola aemula 'Purple Fan' — Vigorous purple blooms; ideal for groundcover in subtropical and temperate zones.
- Scaevola aemula 'White' — White-flowered form for a softer look; good in mixed containers.
Soil Preparation
Fan flower prefers a slightly acidic to neutral pH (6.0–7.0) in well-drained, sandy or loamy soil. Improve drainage with coarse sand or perlite if planting in heavy clay. Avoid waterlogged conditions.
Growing Guide
Plant fan flower in a position with morning sun and afternoon shade, especially in warmer zones. Space plants 30–40 cm apart to allow for spreading. Use a free-draining, sandy or loamy soil; avoid heavy clay. Water deeply but infrequently once established, and trim after each flowering flush to encourage compact growth and repeat blooms.
Sowing
Sow seeds on the surface of a fine seed-raising mix, barely covering them. Keep moist at 20–25°C; germination takes 10–21 days. Transplant seedlings when 5–8 cm tall, spacing 30–40 cm apart. Direct sowing is possible but slower.
Care
Feed with a balanced slow-release fertiliser in spring and summer. Prune lightly after each flowering flush to remove spent stems and encourage compact growth. Deadhead regularly to keep the plant tidy and reduce pest risk.
Companion Planting
Pair fan flower with other low-growing natives like Scaevola 'Blue Fan' or Brachyscome 'Strawberry' for a colourful groundcover. Avoid planting near aggressive spreaders like Lantana or invasive grasses that may outcompete it.
Common Pests & Risks
Aphids and spider mites may appear in dry conditions; control with a strong water spray or insecticidal soap. Fungal issues like powdery mildew can occur in humid spots—improve air circulation and avoid overhead watering.
Troubleshooting
Yellow leaves: overwatering or poor drainage—reduce water and improve soil. Brown leaf edges: underwatering or salt burn—water deeply and flush soil. Leggy growth: too much shade—move to brighter spot. Few flowers: insufficient sun or over-fertilising—adjust light and reduce nitrogen. Powdery mildew: humid air—increase spacing and avoid wetting foliage.