Callistemon hybrid Common / Product Name: Harkness
Genus Species: Callistemon hybrid
Common / Product Name: Harkness
Habit: SMALL TREES (ST)
Height x Width: 4 – m x 3 – 5m
Frost Tolerance: High
Clay & Heavy Soil Tolerance: Adaptable
Coastal Tolerance: Medium
Drought Tolerance: Medium
Origin: Australian Plant
Flowering: starts: Late Spring / ends: Early Summer
Flower Colour: Crimson/Red
Irrigation: Yes requires spring watering for best flowers, water during dry periods
Lower Temperatures: Temperatures as low as -7°C for short periods once established. Some frost damage below -3°C on foliage.
Upper Temperatures: Temperatures in the Low 40’s°C will tolerate higher temperatures for short periods.
Fertilising: Slow release low phosphorus fertilizer.
Environment: Plants selected suitable for Melbourne surrounds and southern states of Australia.