How to grow cordyline
Overview
Cordyline fruticosa is a broadleaf evergreen shrub grown for its bold, strap-like leaves in shades of green, red, pink, and purple. It provides structural contrast and links bolder feature plants together in tropical and subtropical garden designs.
Varieties
- Cordyline fruticosa 'Red Sister' — Vibrant pinkish-red leaves, very popular in Australian gardens for its colour.
- Cordyline fruticosa 'Green Goddess' — Deep green leaves with a slight gloss, ideal for filling shady spots.
- Cordyline fruticosa 'Torbay Dazzler' — Variegated cream and green leaves, good for adding contrast in mixed borders.
Soil Preparation
Prefers slightly acidic to neutral soil (pH 5.5–7.0) with good drainage. Enrich with compost or well-rotted manure before planting; avoid heavy clay unless amended with gypsum and organic matter.
Growing Guide
Plant in well-drained soil enriched with organic matter, spacing 60–90 cm apart. Choose a position with bright, filtered light or morning sun only; harsh afternoon sun can scorch leaves. Keep soil consistently moist but not waterlogged, and apply a thick layer of mulch to retain moisture and suppress weeds. In cooler districts, wait until after the last frost to plant, or grow in a sheltered spot against a north-facing wall.
Care
Feed with a balanced slow-release fertiliser (e.g., 14-14-14) in early spring and again in midsummer. Prune away damaged or untidy leaves at the base to maintain shape, and remove spent flower stalks if they appear. Mulch well to retain moisture and suppress weeds.
Companion Planting
Good companions include Heliconia, Alpinia (ginger), and Philodendron for a lush tropical look. Avoid planting near heavy feeders like citrus that may compete for moisture and nutrients.
Common Pests & Risks
Scale insects and mealybugs can appear on stems and leaf undersides; treat with horticultural oil or soap spray. Mites may cause stippling in dry conditions; increase humidity or apply a miticide if severe. Monitor regularly for early signs.
Troubleshooting
Yellow leaves: often from overwatering or poor drainage; let soil dry slightly between waterings. Brown leaf tips: caused by dry air or low humidity; mist regularly or group plants. Leaf drop: from cold stress or sudden temperature change; move to a warmer spot. Stunted growth: from lack of nutrients; apply a balanced fertiliser in spring. Spots on leaves: from fungal disease in wet conditions; improve air circulation and avoid overhead watering.