I'm having terrible problems with my winter squashes this year. I doubt I'll have a single Sweet Meat from 3 enormous plants, and my Marina Di Chioggias are giving me problems too. The latest problem is splitting as shown in these pictures.

The only thing I can think of is that they are growing too fast. Is that a logical explanation?

Too much water? Not enough?

Is this possibly characteristic of the large, wheel-shaped winter squashes?

My Banana Squashes have had no problems this year. No problems with Hubbard or Butternut last year. This is very discouraging. I'm wondering if I should just avoid these large, wheel-shaped beasts.