Me too...I considered setting up another account for all the junk mail to go to, but then it wouldnt be linked to my fb account...so that wont work.
Prob your best course of action is to just plant whatever grows fastest cause then you can do it a few times a day. once your funds are up a bit, plough new ground and plant ones that take a little longer, but keep planting shorter ones too....
Was thinking of giving warzone tower defence another go. played it for about 2 months, mainly to beat dds dad at it, then to beat his mate. but in the end it was taking over an hour to beat previous score and no save point. No point when you only get a few mins here and there!