150 Water drops
2 Black Sheep
This ones tricky but fun with it.
You don't need to remove all of the flowers. The only thing is, if you don't, you cannot move the sheep and you won't get extra points from crops falling on the grass.
Aim to move the left side of it, you will probably find the right side clears anyway once you are making rows.
Move the sheep down as soon as you get a path, no matter how small and lead him over to the hay.
Then concentrate on making as many rows as you can on the grass.