Would probably be best in doubles, so you don't waste the next turn switching out after setting it up. Tanky Grass types (Tangrowth, Roserade, Mega Venusaur) will probably appreciate the slight healing it gives, and the 50% boost to Grass moves as well to give them more offensive presence. Part of me thinks that offensive Grass pokes like Contrary Serperior could work pretty well with it too, but someone would need to test that out.
Fortunately the Flabebe line gets the move, so you don't need to have 2 Grass types on the field at once to use it.