Anne
Do you have a list of trees/shrubs with non-invasive roots?

Submitted: 07:18PM, 30 Oct 2009
Answer: Hi Anne, not sure if you refer to drains or foundations but there really is no such thing as non-invasive roots – it’s all a matter of degree. It depends on the sensible placement of the particular species of tree with consideration to structures, pipes cables etc. For example, any plant, even a small Camellia, close enough to a leaking underground clay pipe will find its way in and cause problems, or even a palm with a fibrous root system and bulbous base can push over a retaining wall if planted too close. Generally the bigger the plant or tree, the bigger the roots sytem is going to be. Willows, bottlebrush and melaleuca seem to be capable of ‘travelling’ long distances to a leaking sewer pipe, and some Australian rainforest species such as Kaffir Plum have adapted over time to have a shallow surface root system that covers a huge amount of ground and will tap into any source of water leaking from underground pipe and lift pavers etc. Planted too close to paths or foundations, any large tree can cause damage over time. Your local nursery should have a horticulturist who can tell you the particular habits of trees you are thinking about using in your situation and warn of potential problems in years to come.
Category: General
Tags: tree roots
Answered: 07:07AM, 17 Nov 2009

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