Not sure about Myrtle Beach, but in Augusta Ga, fall tomatoes need to be transplanted around the first of August. They slow down so much with decreasing daylight that later plantings have difficulty ripening. Lots of green tomatoes for Thanksgiving tho.

Yes, Paul, here in Georgia we plant fall tomatoes in mid July to August first. Usually early varieties that can handle a chill well (Glacier, Stupice, Red Siberian, etc). GGG on the Georgia forum also has a technique for stripping the diseased parts off of existing plants that have shut down from too much heat with a pair of scissors in one hand and an alcohol pad in the other (to keep scissors/plant clean). Then she sprays with a neem oil mixture and tries to keep the plants healthy so that they might start to produce again once the heat goes down. She has good results. I use her technique all summer and my plants are so much more healthy than before...
Oh, and now is a good time to plant early producing cucumbers too.

Thanks Farmerdill & Stellabee for you input! Didn't think about the decreasing daylight and the idea of using "early" types for the second growing. Great advice! Guess I will just have to learn by trying...

Paul

rocklandguy,
I am in Charlotte, and yes, my garden looks rough by this time, unless I stagger my crops. I plant tomatoes in early Spring, right after the frost and then at least 8 weeks later. Same with cukes, beans, and squash.