Calculate the time to plant your pumpkins by counting back from the time you need them. For example, most pumpkin plants take 110 days from planting to produce a ripe pumpkin. If you want pumpkins in October, plant seeds in July.
Locate an area in the garden that is large enough to support several pumpkin plants. A healthy pumpkin plant can spread 15 feet in all directions.
Clean area of weeds and debris. Make several hills or rows, keeping in mind that vines will be planted 5 to 6 feet apart in rows 6 to 8 feet apart.
Add organic granulated fertilizer at recommended rate.
Plant 4 to 6 pumpkin seeds 1 to 2 inches deep in one area at a time 6 feet apart. You will eventually thin each bunch of sprouting plants to two or three plants per hole.
Water in well and water regularly during the growing season. For healthy pumpkins, don't allow plants to become stressed.