What combo do you need to make to get the mushrooms out of the boarded squares?

I have been stuck on level 273 for, literally, weeks now. I watch for combos and all the extras etc. However, weeks now and I can't get past it. I am ready to trash the game as..come on.. I don't mind hard work, but 6 weeks is far to long to be stuck on a level. Anyone have any tips, tricks or hints for getting past this level?

You have to get 5 fruits to make one lemon and 5 lemons to make 1 lime...meanwhile the tumble weeds cover everything very quickly....quicker than you can delete them while trying to save your lemons. Been 3 weeks on this level...getting annoyed and might just end the game. I don't think it can be achieved....unless there is a trick I can't figure out! Anyone????