call your county government , see if they have an Agriculture extintion office ,
or ask a reputable garden center mngr who is the master gardner for the area ,
or do a Google search fpr the master gardner for the area , they should have Lots of advice
or just get your self one of these
http://www.amazon.com/Red-Dragon-VT2...6903536&sr=8-1
Hell get one any way , they are usefull and fun !!!