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Recent slips and general land instability resulting from severe storms and extreme rainfall throughout the North Island have brought into focus the absolute need to respect cliff faces and steep areas. Also, a need to thoroughly investigate potential methods for remediating land laid bare by slips.
In principle, the land is stabilised by layers of the root structures of different plant species, so a variety of species should be considered. Major stabilisation is achieved by tree species, but dense root layering is achieved by the planting of spreading shrubs such as Coprosma family species Taupata (Coprosma repens) and Karamu (C. robusta), and our native flax (Phormium tenax), as well as ground-covers like Pohuehue (Muehlenbeckia spp).
Takana native trees sells trees from an already large 25L size. We acknowledge requirements may well be for smaller bag sizes initially.
It’s very important to stabilise cliff tops and cliff faces, but and bases should also be attended to, dependant on access and danger of potential further slippage while planting. In more precarious locations smaller bag sizes should be used to minimise further damage to banks, using plants which will initially form shrubs, rather than upright trees vulnerable to wind.
At the cliff base, protection of the ‘toe’ of the cliff is achieved by larger bag size trees.
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