How to Grow Flowering Gum
Corymbia ficifolia
Flowering Gum thrives in full sun with well-drained sandy or loamy soil. Plant in a sheltered position away from cold winds and frost pockets. Water regularly during the first two years to establish roots, then reduce as the tree becomes drought tolerant. Apply low-phosphorus native fertilizer in spring. Prune minimally in late winter to shape and remove dead wood. Frost-sensitive when young so protect with fleece in cold spells.
Yearly Lifecycle
Care Essentials
Apply a low-phosphorus native plant fertilizer in spring. Avoid high-phosphorus feeds which can cause toxicity in eucalypt-family trees.
Watch For
- Root rot (Phytophthora)
- Psyllids
- Borers
- Canker
Companions
Grevillea, Callistemon (Bottlebrush), Westringia, Lomandra
Care Requirements
Light
Full sun
Needs at least 6-8 hours of direct sunlight daily. Tolerates light afternoon shade in very hot climates but flowers best in full sun.
Spacing
6-10m apart
Allow 6-10m between trees depending on cultivar. Dwarf grafted forms can be spaced at 4-5m. Check mature spread of your specific cultivar.
Watering
Regular when young; minimal once established
Water deeply and regularly during the first 1-2 years after planting to establish roots. Once established, the tree is drought tolerant and only needs deep watering during extended dry spells.
Fertilizing
Low-phosphorus native feed in spring
Apply a controlled-release low-phosphorus fertilizer formulated for native plants in spring. Avoid high-phosphorus feeds which cause toxicity in eucalypt-family trees. Over-fertilization risks leaf burn.
Pruning
Minimal pruning in late winter
Prune in late winter or early spring before new growth begins. Remove dead, damaged, or crossing branches. Formative pruning when young to establish a strong framework. Minimal pruning needed once mature.
Mulching
Organic mulch, away from trunk
Apply a layer of organic mulch around the base to retain moisture and suppress weeds. Keep mulch well clear of the trunk to prevent collar rot. Replenish annually in spring.
Growing Tips
Site selection is critical
Choose a sunny, sheltered position with well-drained soil. Avoid frost pockets and exposed windy sites which damage flowers and can kill young trees.
Establish with deep watering
Water deeply once or twice a week during the first two summers. This encourages deep root development and drought resilience. Reduce once established.
Low-phosphorus feeding only
Eucalypt-family trees are sensitive to phosphorus. Always use a native plant fertilizer with low or no phosphorus. Standard garden fertilizers can cause leaf burn and decline.
Enjoy the summer spectacle
Flowering occurs in summer with masses of red, pink, or orange blooms that attract birds. Avoid pruning in the lead-up to flowering to maximize the display.
