20 Moves (revised)
100 Water drops
Use the crops on the logs as they rotate, giving you the possibility to make rows.
You need to not only open the flowers., but also break webs to get to the spiders, so make rows in between all of these wherever you can.
Make combination rows, L or T shapes for extra points and to get into the awkward corners.
Starting towards the bottom of the board, means that you are more likely to have crops matching themselves up at the top as they fall, which can also help open flowers etc.