Knob-thorn

Acacia nigrescens
 

1/ Easily cultivated from seed. There are +/- 6,200 seeds per kilogram. Soak seed in hot water, leave overnight and plant in separate black plastic nursery bags the next morning. Seedlings form a long taproot and must be planted into larger bags when they reach the 3-leaf stage. Seedlings transplant easily. A fast-growing species, up to 700 mm per year. Drought-resistant and can withstand cold, but sensitive to frost.

2/ The Knobthorn is easily propagated from seed. The seeds can be soaked in cold water for two days for better results. They can also be treated by pouring hot water over them and leaving them for 24 hours. Plant in well-fertilised soil. Sensitive to frost. They are extremely slow-growing – just over half a metre in one year, hence the hard wood.

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This web page was last updated on: 30 July, 2011