Collocations for vegetation - noun

green | dense, lush, luxuriant, thick | scrub, scrubby, sparse
As we drove towards the desert, the vegetation became sparse.

decaying, decomposing, rotten, rotting
piles of rotting vegetation

natural
Removal of the natural vegetation has resulted in a loss of nutrients in the soil.

aquatic, woodland, sub-tropical, tropical

be covered in/with
The hills are covered in lush green vegetation.

grow

cover