rootbound

(ˈruːtˌbaʊnd) adj(of a pot plant) having outgrown its pot, so that the roots are cramped and tangled

Encircling roots at the bottom the rootball of a container-grown plant that indicate it has been left too long in too small a pot.

Thesaurus

Adj.	1.	rootbound - (of a potted plant) grown too large for its container resulting in matting or tangling of the rootspotboundplanted - set in the soil for growth
	2.	rootbound - having the roots matted or densely tangled; "shaggy untended lawns of old trees and rootbound scented flowers and shrubs"- William Faulknertangled - in a confused mass; "pushed back her tangled hair"; "the tangled ropes"

Synonyms for rootbound