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How to Plant and Grow Pumpkins

two orange pumpkins on a green vine growing in the garden
Image Credit:
Maximkabb/Getty
Botanical Name
Cucurbita maxima, C. moschata, C. argyrosperma
Grown as
Annual
USDA Zones
3a
3b
4a
4b
5a
5b
6a
6b
7a
7b
8a
8b
9a
9b
10a
10b
Toxicity
Non-toxic
Sun Exposure
Full Sun
Water Needs
High
Height
1–3 feet
Spread
20+ feet
Soil pH
Neutral
Bloom Time
Summer
Flower Color
Yellow
Special Features
Container-Friendly
Attracts Pollinators
Resilience
Heat-Tolerant
Plant Type
Vegetables
Written By: Catherine Boeckmann Executive Digital Editor and Master Gardener

Give neighbors “pumpkin” to talk about by growing your own pumpkin patch and harvesting spooky jack-o-lanterns, tasty pie pumpkins, or award-winning giants right in the comfort of your own garden (or patio!) 

From planting to harvest, this guide will teach you all you need to know to grow any sort of pumpkin in beds or containers, and how to identify pumpkins that are perfectly ripe and ready to pick.

Planting

When to Plant Pumpkins

Pumpkins are sensitive to transplanting and cold weather, so it’s best to sow seeds directly outdoors well after the danger of frost is past and soil has warmed to around 65° to 95°F (18° to 35°C). Make sure to check seed packets for “days to harvest” information if you want to harvest pumpkins in time for Halloween. Different varieties mature at different rates; however, planting seeds by late May in northern climates or as late as early July in the deep south should ensure most varieties have enough time to mature before frost.

If you’re working with a very short growing season, you can also sow seeds indoors about 2 to 4 weeks before the last spring frost. Just make sure to use biodegradable pots to minimize root disturbance and harden the seedlings off before transplanting them outside when the weather warms.

Where to Plant Pumpkins

Compared to other crops, pumpkins are particularly demanding about space, so always ensure that you provide enough space for the varieties you’d like to grow. Ideally, you’ll want around 1,000 square feet per plant for giant types, 50 to 100 square feet for regular-size varieties, and about 15 to 36 square feet for miniature types. That said, you can keep small varieties like ‘Baby Boo’ or ‘Small Sugar’ in 20 to 25-gallon containers and use a small trelllis to train their trailing vines.

Aside from space constrants, full sun and fertile, moist, and well-draining soil is a must for growing pumpkins. I always recommend blending plenty of compost or aged manure about 12 to 15-inches deep into the soil before planting seeds. You can also plant pumpkins atop simple “melon pits” to fuel their growth.

How to Plant Pumpkins

Pumpkins can either be planted in rows, in hills, or solo in pots depending on your space.

  • In hills, plant 4 to 5 seeds per hill, space hills 4 feet apart, and thin the seedlings to 2 to 3 plants per hill once their true leaves form. If you’re short on space, direct the vines to the outer edge of the garden bed. Hills can either be mounded or flat, but mounding soil helps it warm up faster in spring and drain better!
  • In rows, sow seeds 6 to 12 inches apart and then thin the seedlings to one plant every 18 to 36 inches when they’re a few inches tall. Individual rows should be spaced 8 feet from each other.
  • In pots, select containers that are 20 to 25-gallons in size and small varieties of pie or miniature pumpkins. Installing a trellis at planting time can help you avoid damaging delicate vines later on.

To plant, set the seeds 1 inch deep in rich soil or seed starting mix and keep the seeds good and moist until they germinate.

In this video, Ben shows us his method for growing pumpkins!

Growing

Watering

Pumpkins need about 1-inch of water per week, either from your hose or rainfall. For best results, water plants deeply in the morning and on very hot afternoons — especially during fruit set — and do your best to direct water straight to the plant roots. Keeping pumpkins leaves dry is one of the best ways to avoid rot and common diseases like powdery mildew.

Fertilizing

Blending compost or aged manure into the soil before planting helps pumpkins grow better and encourages larger fruit production. After that, side-dress plants with additional aged manure or compost mixed with water as needed and feed with a high nitrogen fertilizer when the plants are about 1-foot tall and the vines are just about to run. When flower buds form, switch to a high phosphorus fertilizer to fuel rapid pumpkin growth.

Pruning or Maintenance

Covering pumpkins with row covers early in the season can reduce some pest problems, but covers need to be removed before flowering to allow for pollination. Bees and other pollinators are essential for pumpkin growth, so avoid using pesticides whenever possible and consider growing flowering companion plants near pumpkins to increase pollinator activity. Placing a bee house in your garden is an effective way to draw bees in too.

Careful pruning can reduce disease, increase fruit size, and is key if you want to grow prize winning pumpkins. To do this, pinch off the fuzzy ends of pumpkin vines after a few pumpkins form to stop vine growth and focus the plant’s energy on fruiting. Once the fruit develops, remove all but the best 1 to 3 pumpkins per plant as well as all late blooming flowers, prune the main and secondary vines to 10 to 15 feet, cut away the smaller, tertiary vines, and bury the cut vine tips in the soil to optimize fruit development.

As the fruit matures, turn pumpkins carefully to encourage even growth. Placing a thin board, stone, or piece of tile under pumpkins can protect fruit from rot and pest damage as well.

Tip: If your first flowers aren’t forming fruits, that’s normal. Both male and female blossoms need to open for pollination to occur. Patience is key!

Seasonal Care

Maintaining a regular watering and fertilizing regimen is essential if you want to grow the best pumpkins. It’s also a good idea to add mulch around plants to retain moisture and suppress weeds. When needed, weed carefully to avoid damaging delicate pumpkin roots and vines.

If you’re growing pumpkins on a trellis, support developing fruit with a hammock or old nylon stocking to prevent vine breaks.

Spacing for Pumpkins

Harvesting

When to Harvest

Pumpkins should be harvested when they’re fully ripe and reach the mature size of the variety of pumpkin you’re growing. Most pumpkins take 90 to 120 days to mature; however, it’s best to use visual cues to determine if pumpkins are ready to pick or not.

  • Color. Pumpkin rinds should turn a deep, solid color as the fruit ripens. This is orange for most varieties, but can vary.
  • Stem. Stems will harden and take on a brown, woody appearance or detach from the vine all on their own.
  • Sound. Thump the pumpkin with a finger. If it sounds hollow, the pumpkin may be ready. 
  • Fingernail test. Press a fingernail into the pumpkin’s skin. If it’s hard and resists puncturing, it’s ripe!

How to Harvest

Ideally, pumpkins should be harvested on a sunny day when the weather is dry.

To harvest, cut the fruit from the vine with a sharp knife or pair of pruners and leave about 3 to 4-inches of stem attached to each fruit. Handle pumpkins gently to reduce brusing and never carry them by their stems to avoid accidental falls.

Storage

Before storage, carving, or use, pumpkins should be cured by placing them in a protected, sunny spot for 10 days. During this time, temperatures should stay between 80º to 85ºF and humidity levels should hover around 80 to 85%. This process toughens pumpkin rinds so they store better, helps minor abraisions heal over, and intensifies pumpkin flavor.

After curing, store pumpkins in a cool, dry cellar or root cellar at 50º to 55ºF for 2 to 3 months. If you’re carving pumpkins, carve them no more than 3 days before Halloween or the pumpkin will begin to rot.

Check out this video for tips on curing and storing pumpkins.

Pests and Problems

Environmental factors like poor lighting, inclement weather, and reduced pollinator activity can result in poor fruit set and other issues. No matter what types of pumpkins you’re growing, here are some common problems to be on guard for and what to do about them.

Common Problems

  • Poor fruiting or flower drop may indicate pumpkin flowers aren’t being properly pollinated. Growing flowering companion plants and avoiding pesticides can naturally invite bees and other beneficial bugs in!
  • Blossom-end rot can produce sunken spots on the blossom end of developing fruit. This is usually caused by irregular watering, buy may also indicate pumpkins are craving extra calcium

Common Pests

  • Aphids are sap-sucking insects that can cause pumpkins to develop distorted leaves or coat plants with a sticky “honeydew” residue. Companion planting can naturally reduce aphid activity, while active infestations can be managed by spraying plants with your hose or regular applications of an organic insecticidal soap spray.
  • Cucumber beetles target plants in the Curcurbit family, and pumpkins are no exception. Installing row covers at the beginning of the season can help keep these wee, striped beetles from munching holes in pumpkin leaves, while hand-picking is the best way to reduce active problems.

Plant Diseases

  • Anthracnose is a fungal issue that causes spotting on pumpkin leaves and sunken lesions on fruit. The best way to control its spread is to destroy infected plants, purchase disease resistant varieties, and avoid overhead watering.
  • Powdery mildew and downy mildew are also caused by fungal spores and can cause spotting on pumpkin leaves or stunt pumpkin growth. Watering plants at the soil line and spacing pumpkins well apart should naturally reduce mildew issues, or you can preventatively spray plants with a mixture of 40% milk and 60% water.

Types

Pumpkins come in different sizes and colors and can be used for different purposes. Athough all pumpkins are technically edible, some are better for carving or display, while others are ideal for cooking. Knowing how you’d like to use pumpkins will help you select the very best varieties for your goals!

  • Miniature pumpkins like ‘Jack Be Little’ and ‘We-B-Little’ are great for ornamental use and small spaces. They’re also super productive and easy to grow.
  • Carving pumpkins like ‘Autumn Gold’ or ‘Merlin’ are the pumpkins you want for jack-o-lanterns.
  • Pie pumpkins like ‘Sugar Treat’ and ‘Peanut Pumpkin’ are prized for their sweet flesh and can be used for pies, soups, curries, and purees.
a green pumpkin turning orange on the vine
Image: Arina P Habich/Shutterstock

Wit and Wisdom

  • Pumpkins are native to North American and have been cultivated for around 8,000 to 10,000 years.
  • According to folklore, pumpkins were once believed to cure snakebites. A slice of pumpkin pie before bed was thought to help you sleep!
  • Carving faces in pumpkins and veggies like turnips is an old timey Celtic practice that was thought to scare away evil spirits.

Vegetables

About The Author

Catherine Boeckmann

Catherine Boeckmann

Executive Digital Editor and Master Gardener

Catherine Boeckmann loves nature, stargazing, and gardening so it’s not surprising that she and The Old Farmer’s Almanac found each other. She leads digital content for the Almanac website, and is also a certified master gardener in the state of Indiana.

Read more from Catherine Boeckmann

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Comments

<span>Mrssweet09</span> Tue, 09/17/2013 - 07:14
If I were to pick my pumpkins now would they keep until Halloween?
<a title="View user profile." href="/author/editors">The Editors</a> Fri, 09/20/2013 - 12:55

Yes, your pumpkins will definitely last until Halloween if you treat them right. When you harvest them, keep the stem, let them cure in the sun for 10 days, and store in a dry cool place. With proper care, your pumpkins could last through the winter.

 <span>Don Mulligan</span> Mon, 09/16/2013 - 15:35
While harvesting a prize pumpkin, I cut a small slice in the skin of a big max. I assume that spot will start to rot. Is there anything I can use to fill the slice and stop the rotting?
<a title="View user profile." href="/author/editors">The Editors</a> Fri, 09/20/2013 - 13:12

Perhaps you could do what we do to keep carved pumpkins from rotting. Dab the cut surface with Chlorox Clean-up (with Bleach) and let it dry. Lightly rub on petroleum jelly to keep out new bacteria. Store in a dark, cool place.

 <span>Cha</span> Sun, 09/15/2013 - 17:53
When is it too late to water the pumpkins And how to prevent holes in the pumpkin
<a title="View user profile." href="/author/editors">The Editors</a> Fri, 09/20/2013 - 12:52

When to water?  Pumpkins are ALWAYS thirsty. They are 80 to 90% water. The question is: How much? Just turn off the water when puddles appear and wait until the soil is just dry on the top before watering again. By mid-August the plants are pulling in a huge amount of water. If it’s a dry season, give each plant 15 to 20 gallons of water twice a week. Water in the evening, and do not water the leaves; water at the base of the plant to avoid disease.

 <span>Jjmims</span> Thu, 09/12/2013 - 10:27
Once again, I'm another 1st time grower. My plants are doing sooo well, I would like to plant the same ones next year...the problem...I can't remember which ones I planted. How can I plant from these pumpkins for next year, bc we have MANY!?!....we have close to 30 from only 6 plants!
<a title="View user profile." href="/author/editors">The Editors</a> Thu, 09/12/2013 - 12:38

You can save the seeds from a mature pumpkin and plant them next year. Make sure you dry the seeds well and then store them in a paper envelope. Good luck!

 <span>Marymckirt</span> Thu, 09/12/2013 - 08:54
I live in central Fl I panted my pumpkins in the in of July begining of August and I have male and female flowers but am I late for my area and what time should I planted
<a title="View user profile." href="/author/editors">The Editors</a> Thu, 09/12/2013 - 12:44

Hi Mary,

You will probably not get pumpkins for Halloween. Look at  the seed package for days to maturity to figure out when to plant. Maturity of pumpkins varies from 70 to 120 days. Most varieties should be planted by early July to ripen in time for Halloween.Fall is a good time to grow squashes and pumpkins in Florida. You will enjoy your pumpkins for Thanksgiving.