Are tree ferns invasive in the UK?

Are tree ferns invasive?

Are tree ferns invasive?

NO. If you’re growing tree ferns such as Dicksonia Antarctica in the UK, then no, it’s certainly not invasive due to the sheer amount of time it takes to grow and spread. No chance here!

Are tree ferns invasive in more suitable climates?

YES. Yes, some tree ferns can well be invasive in certain countries (or habitats) such as Hawaii. Hawaii lists the tree fern Cyathea Cooper as ‘high risk’ against their ‘Hawaii Pacific Weed Risk Assessment’. These tree ferns were introduced into Hawaii as an ornamental plant. 

The issues Hawaii faces from these tree ferns are quite interesting, primarily that the spores from the tree fern can travel over 12km on the wind from the parent plant, and grow fast and aggressively (and soon outcompetes) the other native plants that are growing in the understory of the forest. The tree ferns also displace some of the native ferns, such as the Hapuu. 

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Last Modified: September 6, 2022