The easiest way to deal with the pink flowers in this Level is to drop some line blasters right down to the bottom rows and blast the flowers away!
If you concentrate on one column it can get a few line blasters falling together so you can shoot off one straight after another (before the flowers have a chance to recover and start spreading vines)
Once the flowers are out of the way, get your Pets down within a few columns near each other to save on moves.