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
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Merriam-Webster unabridged
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