G'day Tegs Welcome to the PRI Forum. You may also wish to consider as part of your species selection process the ability of the plant to coppice well. Leguminous (Family: Fabaceae) tree species, such as certain Acacias (endemic to your local area?) and Chamaecytisus palmensis (Tagasaste syn. Tree Lucerne) do fit this bill. However in the case of the latter, your micro environment would need to match that of the La Palma (the home of Tag, and which is more Mediterranean than sub-tropical) in order for it to perform at an optimum. Tag will form a dense thicket, and is therefore ideally suited as a first row species in an effective windbreak (with taller plant species behind). Cheerio, Marko.