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taterbug_gw

barriers for invasive plant roots

taterbug
9 years ago

What have you used in the ground to prevent invasive plant roots from spreading? How deep would a barrier need to go in the ground? I saw metal roof flashing (I think) at the box store, that is about 18" wide. Would that work? Any less expensive option?
The plants I want to contain are dwarf mexican ruellia, Gregg's Mist, canna, and obedient plant. Does Obedient plant spread through roots, or seeds?

Thank you for your help,
taterbug

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