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.

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*

Vegetables

About The Author

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.

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Comments

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<a title="View user profile." href="/author/editors">The Editors</a> Tue, 09/18/2012 - 14:40

You can cover them with a sheet at night or harvest them. Place the picked pumpkins in the sun during the day. They will still turn a bit more orange.

Anonymous Sun, 09/09/2012 - 12:24

I had a bunch of pumpkin vines growing in my flower garden (probably from fall decorating)I pulled all but 2 of them as I was not sure what it was. Now I have 1 good size pumpkin but it is dark green?? Should I cut the vine beyond the pumpkin or some of the leaves so it could get some sunshine?

Anonymous Mon, 09/10/2012 - 06:42

Perhaps it is a green variety of pumpkin! In Australia lots (most) of the commonly grown varieties of pumpkin are green, grey or speckled. If the pumpkin you started with was a hybrid perhaps it has reverted to type? If this is the case then you should expose it to sunshine after it has been cut if you want to store it but just having one I would just eat it straight away.

Anonymous Fri, 09/07/2012 - 12:42

Do I still need to water the plants/vines after the plants turn a whitish/grey and appear to be dying off? The vines are all brown but the actual fruit is beautiful orange. Do they still need to be watered?

Janice Stillman Fri, 09/07/2012 - 16:42

Funny you should ask; I have the same problem here in New Hampshire: beautiful fruit on a white, shriveled, even moldy vine. It seems that the problem may be to much water—and that's not necessarily your fault. It could have been too much rain and too warm conditions. It also may be a symptom of bad insects. If the vines are bad or going bad, they will not be able to deliver moisture to the fruit and in fact may decay further and more quickly if you water. Keep an eye on the fruit. Pick it and enjoy it in whatever way you can: on display, in a pie, whatever. It's part of the experience. Next season consider crop rotation or amending your soil. Hope this helps.

Anonymous Thu, 09/06/2012 - 18:23

I live in northern Canada and have had great luck growing a variety of pumpkin. For the first time this year, powdery mildew seems to have overtaken a number of my varieties. I tried to slow it with sulfur, but almost all of my leaves are dead. We are moving to a new property before next year and I was wondering how to go about preventing, eliminating this problem (chemically-organic or otherwise). I know to water early in the day and not get the leaves or stems wet much... and high sun and to eradicate infected leaves on first sight...

Diana Sidia Wed, 05/29/2013 - 16:08

Hello my kids open a pumkin last octuber and now we have a beautiful pumpkins in the backyard the vine gave around 8 big ones they are orange and huge when is the right time to cut and are they going to be ok for next october?

Anonymous Mon, 10/08/2012 - 18:41

I am not really very experienced, but I got a lot of powdery mildew on all my squash plants this year. We live in the Denver, Colorado area. I just let the leaves die off, then picked them and cleared them out of the garden. By then there were a lot of fresh new leaves that took over. I think it helped to get the sun in there from picking the dying leaves. My plants did great after that. The fruit was good and all. I just harvested a 55 lb pumpkin, and have had many other varieties that did great too. The mildew did not return. I guess I was just lucky.

<a title="View user profile." href="/author/editors">The Editors</a> Fri, 09/07/2012 - 16:24

Choose PM-resistant cultivars and provide enough space between plants so that each has plenty of air circulation. Keep up with weeding to reduce plant stress. Use soaker hoses. Avoid overfertilizing. There are fungicides for PM used as protectants (preventatives) and those for eradicating the disease once it appears; some offer both. Make sure that you choose one that is safe for pumpkins. Some strains of PM are resistant to fungicides. Fungicides include: Sulfur. Neem oil solutions. Jojoba oil. Copper sprays. A solution of about 1 tablespoon baking soda and 1 tablespoon horticultural oil in 1 gallon water; baking soda solution without the oil is not as effective. Potassium bicarbonate is said to work even better than baking soda (sodium bicarbonate); you can find fungicides with potassium bicarbonate in garden centers; certain concentrations, however, can injure plants; baking soda, if used a lot, can affect soil structure. Ask your local garden center for recommendations.

Bigmouthfrog Mon, 09/03/2012 - 12:35

I am experiencing some uneven pumpkin growth. I have 4 fruit on a plant that are spread out evenly around plant. Two of the fruit are very nicely shaped. Then there are two that are pointed on the end! Is there any way that i can get the point out of their ends, maybe standing it up? If I can stand them up will it bother the small roots that taken ground throughout the vine? And what would be a good idea to prop them up! I have about three weeks till harvest date as well. thanks!

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How to Plant and Grow Pumpkins