Keeping ficus tree roots from “invading” concrete yard

Question

We have moved into a townhome which has 12 ficus trees planted about a year ago for privacy in the backyard. I am afraid the roots will grow under the concrete in the backyard. Is it a good idea to put up a “wall” at the edge of the concrete to discourage the roots from growing in?

Answer 1

Thank you, ficus wrangler! Your answer and references were most helpful. I can now proceed to get the "wall" with confidence!

Answer 2

Ficus trees, depending on the variety, can be very invasive. In south Florida it's even against the law to plant them outside. This article will give you more information: https://www.gardeningknowhow.com/ornamental/trees/tgen/problem-tree-roots.htm