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Pruning Grevilleas

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By Candice Appleby

Honey Grevillea (Grevillea eriostachya) is a local native that produces a sweet and sticky nectar, highly attractive to honeyeaters.

Little known fact: Grevilleas can cause skin irritation and some people can be quite allergic to the foliage and flowers. Be careful while pruning, wear gloves and long sleeves and be sure to wash your hands, arms and legs when you are finished.

One of the best times to prune your grevilleas is in spring. It can be devastating to see the beautiful blooms fall to the ground. But don’t be afraid to sacrifice a few flowers! Pruning in spring is very beneficial, as the plant is experiencing a surge of active growth. The plant will recover very quickly from the prune and you will be rewarded with thicker foliage and an abundance of flowers in no time. Young Grevilleas respond well to a tip prune, whereby you simply cut around 5 to 10 cm of newer growth from the tip. Do this every 3 months or so for the best results. Older Grevilleas may require a hard prune if they are starting to become top heavy and woody. This hard prune should be done in two stages: first by cutting back around 1/3 of the growth (October is the best time for this) then following this up two months later by cutting back another 1/3.

After pruning, be sure to give your Grevilleas a little treat of a low phosphorus native plant fertiliser. Also, why not try your hand at a spot of propagation with the left over cuttings. Head to your local nursery and grab some hardwood rooting hormone gel (Clonex red) and some propagation media – give it a try! Check out this video for a great Grevillea cutting propagation tutorial: https://www.youtube.com/watch?v=ELH6anJdID8

~ Candice Appleby