Howden pumpkins are ready to harvest when the rind turns a deep, uniform orange and becomes hard enough that it cannot be easily pierced with a fingernail. Additionally, the stem will turn dry, thick, and woody. Be sure to harvest before the first hard frost.

To grow larger, more impressive pumpkins, limit each vine to 2 or 3 developing fruits. Once a few healthy pumpkins have set, prune off subsequent flowers and fruit so the plant directs all its energy and nutrients into maturing the remaining pumpkins.

Yes, pumpkins need consistent moisture, receiving about 1 to 1.5 inches of water per week, especially during fruit set and development. Water deeply at the base of the plant early in the morning, and avoid wetting the leaves to help prevent foliar diseases like powdery mildew.

After harvesting with a sharp tool (leaving 3–4 inches of stem attached), cure the pumpkins in a warm, dry spot (75–80°F) for 10 to 14 days to harden the skin. After curing, store them in a cool, dry, well-ventilated area around 50–55°F, where they can last for several months.