This is quite a fun level but its one you will be sat around watching.
You need to open the flowers to get to the firecrackers, and you need 60 of them, so start working on them first.
Its not too hard to open the flowers, firecrackers will help along with cascading crops.
You need more firecrackers than are on the board, but as you remove them and crops, more will fall.
Always get higher points crops first, the more of them, the less actual crops you need to remove.
Make as many rows as you can next to the firecrackers to achieve your goal!