How to Grow Pumpkins
As an Amazon Associate we earn from qualifying purchases.
Learning how to grow pumpkins starts with warm soil and enough room. Pumpkins are very frost-sensitive, they need full sun, and each vine can run for many feet, so the planting plan matters as much as the seed. Three university guides, from Mississippi State, Nebraska and Illinois, agree on the basics but differ on dates, spacing and feeding. This guide shows those differences.
The sections below cover timing, site and soil, hill spacing, sowing, feeding, water and mulch, pollination, pruning, harvest and storage. Each point names its source, and where the guides disagree, both views appear.
Quick answer
- Plant after the last frost, once the soil has warmed, because Illinois Extension says seeds do not germinate in cold soil.
- Give pumpkins full sun and well-drained soil, and space hills to suit the variety. Illinois Extension allows 5 to 6 feet between hills for vining types.
- Water deeply, about 1 to 2 inches a week, and water at the base of the plant to keep the leaves dry.
- Harvest when the rind is hard and the stem is drying, leave 2 to 4 inches of stem, cure the fruit, then store it cool and dry.
Wait for frost to pass and the soil to warm
Timing is the first decision. Illinois Extension calls pumpkin “a very tender vegetable,” and it warns that “The seeds do not germinate in cold soil, and the seedlings are injured by frost.” It advises that you “Do not plant until all danger of frost has passed and the soil has thoroughly warmed.” Mississippi State says seed needs warm soil to germinate and that planting can begin as early as April in its state.
The three windows differ because the three states differ. The table below sets them side by side, so you can see which one fits your own last frost date.
| Source | Planting window in the source |
|---|---|
| Mississippi State Extension | As early as April in Mississippi, with summer plantings possible if fruit can mature before the first fall frost; for Halloween fruit, early to mid-July |
| Nebraska Extension | After the last frost date, once the soil stays warm; in most regions, “late spring to early summer” |
| Illinois Extension | For Halloween fruit, from late May in northern locations to early July in extremely southern sites |
Early planting has a cost. Illinois Extension warns that “If pumpkins are planted too early, they may soften and rot before Halloween.”
Choose full sun, drainage and fertile soil
Pumpkins need light. Nebraska Extension says “Pumpkins need full sun, at least 6-8 hours of direct sunlight per day.” Mississippi State adds that pumpkins need a sunny spot with well-drained soil, and it warns that they “will start to die after just 48 hours in waterlogged soils.” Its fix is to add organic matter and build high rows, which help drainage.
Soil pH is where the two guides differ. Mississippi State says the best yields come on sandy soils with a pH between 6.0 and 6.8. Nebraska Extension gives an ideal range of 6.0 to 7.0 and describes the soil it wants as “well-drained, fertile soil rich in organic matter.” Both point to the same practical step. Nebraska says to “work in compost or well-rotted manure” before planting, which improves fertility without relying on fresh material. For filling a bed before you sow, see filling raised beds.
Room matters as much as soil. Nebraska Extension warns that “Vines can reach 20-30 feet, so plan accordingly or consider using a trellis for smaller varieties.” Illinois Extension asks for a minimum of 50 to 100 square feet per hill for vining types, which is why the spacing section below matters so much. For a layout that keeps crops apart, see raised bed companion planting layouts.
Space hills for the variety you grow
Hills are the unit most of the guides use. The table below gives Illinois Extension’s spacing by type, since that page is the only one of the three to split spacing by vine habit.
| Type (Illinois Extension) | Spacing | Seeds and thinning |
|---|---|---|
| Vining pumpkins | 5 to 6 feet between hills, rows 10 to 15 feet apart | Four or five seeds per hill, thinned to the best two or three plants |
| Semi-bush varieties | 4 feet between hills, 8 feet between rows | Four or five seeds per hill, thinned to the best two plants |
| Miniature varieties | Rows 6 to 8 feet apart, seedlings every 2 feet in the row | Two or three seeds every 2 feet, thinned to the best plant |
| Bush varieties | Single plant every 3 feet, rows 4 to 6 feet apart | One or two seeds per foot of row, thinned to one plant |
The other two guides give different numbers for the same kind of plant. Mississippi State says to space hills 2 to 5 feet apart within the row, with 4 to 8 feet between rows, depending on the variety. Nebraska Extension says to space hills 4 to 6 feet apart for smaller varieties and 6 to 8 feet apart for larger ones. Use the variety you actually bought to choose a figure, and check the seed packet against the table before you dig.
Sow seed directly or start it in a tray
The guides split on whether to transplant. Nebraska Extension says to plant seed directly in the garden, “as pumpkins do not transplant well,” and to sow 1 to 2 inches deep with three to five seeds per hill. Illinois Extension also advises planting seed directly, at one inch deep. Mississippi State takes a different route. For more uniform production, it says to start seed in a container or tray, then plant one seedling per hill once the seedlings have three true leaves.
Thinning follows either route. Mississippi State says to thin to the best seedling after it has grown for two weeks, and Illinois Extension says to thin each hill to the best two or three plants once the young plants are well established. Where a tray is used, the seedling should be the only plant left in its hill. Mississippi State also says that vines can be trained down the row so the middles stay open for cultivation.
Feed the plants, and avoid too much nitrogen
Feeding is the point where Nebraska and Mississippi State disagree most. Nebraska Extension says to apply a balanced fertilizer at planting, then switch to a fertilizer higher in phosphorus and potassium as the vines begin to run. It warns, “Avoid excessive nitrogen, as it can lead to excessive vine growth at the expense of fruit production.”
Mississippi State takes a more flexible view. It says that “A soil test will allow you to follow exact fertilizer recommendations,” and that if you skip the test, you should apply 4 to 6 pounds of a complete fertilizer per 100 feet of row about two weeks before planting. On the vines, it says that “pumpkins respond to an additional side-dressing of nitrogen when the vines begin to run,” then adds a caution to “be careful not to overfertilize.” Mississippi State also says to keep fertilizer off the leaves, because it “may burn them.”
Water deeply and mulch the base
Water is the other big variable. Nebraska Extension asks for “1-2 inches of water per week” and says to water at the base of the plant to keep leaves dry. Mississippi State gives a seasonal pattern: one inch a week early, and up to two inches during the 30 days before harvest. It also says that “If the leaves begin to wilt, blossoms will drop rather than set fruit.” It describes drip irrigation as an option, noting that drip “uses less water, reduces disease, and only applies it where water is needed.”
Mulch helps with both water and weeds. Nebraska Extension says to “Apply a 2-3 inch layer of organic mulch, such as straw or compost, around the base of the plants.” Mississippi State says black plastic mulch “is beneficial for weed control with many vegetable crops,” and that “Grass clippings, bark products, pine straw, hay, and other products may also be used.” Illinois Extension sums up the weeding job simply: “Pumpkin plants should be kept free from weeds by hoeing and shallow cultivation.”
Pollination, flowers and pruning
Pumpkin flowers need visitors. Nebraska Extension says that “Pumpkins rely on bees and other pollinators to transfer pollen from male to female flowers.” Mississippi State adds that poor weather, such as rain, high winds and high humidity, can affect the bees’ ability to pollinate. If bees are scarce, Nebraska Extension says you can hand-pollinate “using a small brush” to move pollen from male flowers to female ones.
Early flowers may not set fruit. Illinois Extension says that “The first flowers are almost always male,” and that “Male flowers bloom for one day, then drop off the plants.”
Pruning depends on what you want. Nebraska Extension suggests pinching the tips of vines after a few pumpkins have set, to focus the plant on ripening fruit. Mississippi State describes a plan for large fair pumpkins: prune the first few female flowers, let only a few set to baseball size, then keep the best one or two. It also advises turning the developing fruit once a week for a well-shaped result. Illinois Extension gives a similar plan for jumbo varieties, removing the first two or three female flowers and letting one fruit develop.
Harvest, cure and store
Nebraska Extension says pumpkins are “ready to harvest when they have reached their full color, and the rind is hard,” and that the stem should be dry and starting to wither. Mississippi State says the skin should be dark, tough and hard to puncture with a thumbnail. Illinois Extension adds that healthy vines usually allow harvest in late September or early October, before heavy frost.
Cut the fruit, do not pull it. Nebraska Extension says to use a sharp knife or pruning shears and to leave 2 to 4 inches of stem. Illinois Extension asks for 3 to 4 inches, and it says that “Pumpkins without stems usually do not keep well.” Wear gloves, because, as Illinois Extension notes, “many varieties have sharp prickles on their stems.”
Curing comes next. Nebraska Extension says to “cure pumpkins in a warm, dry, and sunny location for 7-14 days” to harden the skin before storage. After that, the guides differ on temperature. Mississippi State says whole fruit keeps for several months at about 50 to 55 degrees Fahrenheit and 50 to 75 percent humidity. Nebraska gives the same 50 to 55 degree range. Illinois Extension says whole unblemished pumpkins “can be stored for 3 to 6 months at 45 to 50-degree temperatures,” which is cooler than the other two. Illinois also warns against storing pumpkins in the refrigerator or in a damp place, because “Moisture causes rapid deterioration.”
Common mistakes to avoid
- Planting too early. Illinois Extension says early fruit may soften and rot before Halloween.
- Overfeeding nitrogen. Nebraska Extension says too much leads to vine growth at the expense of fruit.
- Letting the leaves stay wet. Nebraska Extension recommends watering at the base to keep leaves dry.
- Letting the vines wilt. Mississippi State says blossoms drop instead of setting fruit when leaves wilt.
- Cutting fruit without a stem. Illinois Extension says fruit without a stem usually does not keep.
- Storing fruit in a damp or cold place. Illinois Extension warns against the refrigerator and against damp storage.
Frequently asked questions
Why do pumpkin vines flower but not set fruit?
The first flowers are usually male, so early bloom without fruit is normal. Illinois Extension says male flowers bloom for one day and then drop. Bees carry pollen between flowers, and Nebraska Extension suggests hand-pollinating when bee activity is low.
How many days do pumpkins take to mature?
Nebraska Extension says that “Pumpkins need 75-100 days to mature, so plan accordingly.” Mississippi State’s variety table lists times from 80 to 120 days for different types, and Illinois Extension ties harvest to late September or early October when vines stay healthy. Check the days to harvest on your seed packet.
Can pumpkins be grown for a fair or a giant pumpkin contest?
Yes, with extra planning. Mississippi State says to plant seed “approximately 120 days before the show date,” then prune and thin to the best one or two fruit. Illinois Extension says a jumbo variety needs about 150 square feet per hill, and that it should be planted in early June.
How long can pumpkins keep after harvest?
Properly cured fruit can last for months. Nebraska Extension says that “Properly cured and stored pumpkins can last for several months.” Illinois Extension gives 3 to 6 months at 45 to 50 degrees, and Mississippi State says several months at 50 to 55 degrees.
Should pumpkin seed be started indoors?
Mississippi State says starting seed in a tray gives more uniform production. Nebraska Extension says pumpkins do not transplant well and recommends sowing directly. Both methods appear in these guides.
How we chose
We opened three pumpkin pages from university extension sites on 2026-10-23: Mississippi State Extension, Nebraska Extension and Illinois Extension. We kept a claim only when one of these pages states it in plain words. Where two or three pages disagree on dates, spacing, pH, feeding or storage temperature, we show each figure and say that they differ.
What we could not verify
The three pages leave several gaps, and this section names them so you can plan for them.
What the sources do not say
- None of the three pages gives a single national spacing for pumpkins. The numbers depend on the variety and on the guide you follow.
- The pages do not agree on storage temperature. Illinois Extension gives a cooler range than the other two, and this guide does not decide between them.
- The pages do not say how much fruit a single vine will set, or how big a fruit will grow in a given bed.
- Nebraska and Mississippi State both list pest and disease controls that include products, and this guide does not repeat them.
- No page covers the very hot or very short growing seasons in detail, so local timing should be checked with a county extension office.
Bottom line
Plant after frost in warm soil, give the vines full sun and room to run, water deeply and at the base, and cut mature fruit with a long stem.
Sources
- https://extension.msstate.edu/publications/growing-pumpkins-for-the-home-garden (opened 2026-10-23)
- https://byf.unl.edu/pumpkins (opened 2026-10-23)
- https://extension.illinois.edu/gardening/pumpkin (opened 2026-10-23)
