How Do Pumpkins Grow?

If you’re thinking about raising your own crop of pumpkins, you’re probably asking the question, “How do pumpkins grow?” Learn all you need to know to grow this autumn icon.
Pumpkins Are a Variety of High-Yielding Cucurbits

Pumpkins Are a Variety of High-Yielding Cucurbits

Curcurbita is the family of plants that the pumpkin belongs to. There are hundreds of varieties of pumpkins, which are a late summer crop in the garden. Pumpkins need lots of room to grow.

Photo by: Maria Uspenskaya / Shutterstock.com

Maria Uspenskaya / Shutterstock.com

Pumpkins, along with their winter squash cousins, are often referred to as a “garden gorilla” because they are large plants. These vines sprawl and crawl their way through the growing season, gobbling garden real estate. As you watch these plants stake out their territory, you may wonder how do pumpkins grow? Like all plants, it’s a blend of simple ingredients that fuels the growing frenzy: sunshine, water, and carbon dioxide.

The process of photosynthesis provides the oomph behind a pumpkin vine’s enormous growth. Pumpkin leaves convert sunshine, water, and carbon dioxide into food the plant can use to produce leaves, roots, flowers, and pumpkins. Pumpkin plants grow as a vine, which can easily reach 20 to 30 feet long in the course of a growing season. By harvest season, a single hill of jack o’lantern-type pumpkins can cover 50 to 100 square feet.

In a typical suburban backyard, finding room for a full-size pumpkin vine can be challenging. Many gardeners tuck pumpkin plants along the edges of a vegetable garden and direct the vine along the edges of the garden. This works well—just remember to allow entry points into your garden, or you’ll be wading through pumpkin vines to tend your garden.

Pumpkin-palooza! 10 Pumpkin Varieties

See All Photos

Shop Related Products

Another option is to allow vines to scramble across your lawn. Continue to mow the grass near pumpkin vines, but take care not to damage vines, leaves, or pumpkins. As the main vine starts to establish its path across the grass, lay out a line of compost three to four inches deep along the vine’s trajectory. Vines grow pretty straight, so it will encounter and follow the compost layer.

As the pumpkin vine grows along this path, the stem will sink secondary roots into the compost, anchoring itself to the lawn. These secondary roots help feed the growing pumpkins. At the end of your pumpkin harvest, pull up the vines, mow the grass, and rake the compost into the surrounding lawn. Overseed the areas where the pumpkin vine ran through the compost. Using this method, the pumpkin vine won’t really damage your lawn. Your turf will be as good as new next spring.

You can avoid the problem of lawn-eating pumpkin vines by choosing varieties that grow in a semi-bush or bush formation. These pumpkins take up less space and produce smaller fruit in a shorter timeframe. Some are true miniatures, but others yield pumpkins in the 10- to 15-pound range. The pumpkins on bush and semi-bush plants often have more concentrated sugars than carving pumpkins, making them a wonderful addition to your kitchen pantry.

A semi-bush pumpkin covers 30 to 35 square feet. Semi-bush plants that yield pumpkins in the 2- to 5-pound range include Baby Pam, Oz, and Sugar Treat. Spirit is a semi-bush type that produces 8- to 15-pound pumpkins. A bush pumpkin grows even smaller, needing as little as eight feet. One bush pumpkin is Wee Be Little, which produces miniature pumpkins weighing one-half to one pound. The bush pumpkin variety Bushkin bears 8 to 15-pound fruits.

Keep Reading

Next Up

Growing Pumpkins

These autumn favorites are one of gardening’s most fun plants to grow—and they’re really a cinch. Set your sights on growing a bumper crop of pumpkins.

Pumpkin Tortillas Recipe

Fall baking brings a hearty homemade twist to a flatbread favorite.

Easy Pumpkin and Shrimp Soup

Silky, sweet and soothing, a creamy pumpkin puree-based soup is hard to improve upon.

Pumpkin and White Bean Soup

The quintessential fall pasta dish inspires a soup with similar flavors.

10 Fall Pumpkin Recipes That Aren't PSLs

Are you sick of the pumpkin spice latte? We've collected 10 fall-perfect recipes with real pumpkin flavor.

Fall Craft: Chrysanthemum Pumpkins

Try this clever way to use chrysanthemums and freshly-picked pumpkins on the front porch.

Mod Gourd: Create a Swirly Pumpkin

Add modern flair to your fall decor with this simple pumpkin decorating project.

The 14 Prettiest, Painted Pumpkins in the Patch

The glamourous side of gourds, revealed.

DIY Fall Decorating: A Beach Chic Pumpkin

With inspiration from the sea, a garden pumpkin is transformed to illuminate the night.

Smashing Pumpkins!

Give your gourds a lasting glow for fall and winter holidays.

Follow Us Everywhere

Join the party! Don't miss HGTV in your favorite social media feeds.