I planted 3 Jack-o-Lantern pumpkin plants May 29 here in Queens, NY. They started growing 4-6 leaves. We had a week long heat wave. They are all wilting and dying and the vines are only about a foot long. Each day I water them for only about 2 minutes on a low hose setting in the morning and the evening. Is this too much or too little water for a heat wave? Why are they dying? Here is a picture.