root-bound

adjective

ˈrüt-ˌbau̇nd

also ˈru̇t-

variants or root bound or rootbound

: having roots formed into a dense, tangled mass that allows little or no space for further growth

These plants have a natural tendency to become root-bound, with their roots growing in a spiralling mass. This condition can be accelerated by tight, clay-like soils and shallow, frequent waterings which encourage corresponding shallow, lateral rooting.—

Maire Simington

especially, of a potted plant : having roots formed into a dense, tangled mass that encircles the inside of a container and that allows little or no space for further growth : pot-bound

Even if it's root-bound, a plant shouldn't be repotted just as it goes into the dormant season. —

Tovah Martin

If plants are rootbound and dry out fast, repot into larger containers. —

Sunset