Winter squash needs a sunny, open site for three months or more of frost-free growing time. They require plenty of room for their long, wandering vines. Squash likes a soil that is rich in organic matter, both for nutrients and a good supply of moisture.
To grow a planting of winter squash, the soil should be fertilized with a 10-10-10 formula, meaning there are added amendments of 10 percent of each need element -- nitrogen, phosphorus and potassium. Using a garden fork, turn the fertilizer into the soil at least 12" deep. Next, insert a soil thermometer into the ground to make certain the temperature is at least 70 degrees Fahrenheit.