Can the roots from this plant/tree be invasive to drains or walls? Yes, an Oleander does have considerations when planting near a home or structure. Oleander is drought tolerant and sends it's roots deep along with more surface roots. Plant a Oleander at least 12 to 18 feet from a sewer or water line. Also consider the toxicity of a Oleander. All parts of this plant are toxic, including roots. You will want to contact your local government to check for regulations in planting a Oleander. Oleander should never be planted where children or pets are living.