Do your pumpkin leaves wilt in the afternoon even though you watered your pumpkin just that morning?
That's OK! The leaves tend to do that on hot afternoons.
Remember to keep burying your vines as they grow with fine soil! This pertains to both the main vine and the secondary vines.
TIPS FROM DR. SABOL:
1: Dig a small ditch (one inch deep) fill the ditch with water and bury the vine in the mud. The node (where the leaves come out of the vine) must be underground an inch, and very soon you will have a white root shoot down into the mud at every node. You must water that node for the next 100 days. Many people put a drip line down the primary vine to soak those roots without getting the leaves all wet. Pretty soon, you will have roots under the entire length of the primary and out to all the secondary vines (shoots) that come off the primary.
2: Male flowers will come quickly along main vine. Female flowers come at 8 to 10 feet on main vine. Let three females stay on the vine until size of volleyball. Remove two when three are that size. Never let a female (fruit) develop on secondary vines. Big pumpkins need the main vine. Most monsters are at the 10 foot mark.
3: Your monster will be on the primary vine. Remove all female flower from the secondary vines. NEVER let them even bloom. They are a waste of energy and will not give you the monster you want.
Here are a couple of great sites Dr. Sabol recommended: