Growing Pumpkin

Cucurbita sp. : Cucurbitaceae / the gourd family

Jan F M A M J J A S O N Dec
  S S                  
        T              
        P              

(Best months for growing Pumpkin in USA - Zone 5a regions)

  • S = Plant undercover in seed trays
  • T = Plant out (transplant) seedlings
  • P = Sow seed
  • Easy to grow. Sow in garden. Sow seed at a depth approximately three times the diameter of the seed. Best planted at soil temperatures between 68°F and 90°F. (Show °C/cm)
  • Space plants: 35 - 47 inches apart
  • Harvest in 15-20 weeks.
  • Compatible with (can grow beside): Sweet Corn
  • Avoid growing close to: Potatoes

Your comments and tips

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08 Sep 17, Renae (Australia - tropical climate)
My son and I planted two pumpkin seeds, I have harvested about 8 pumpkins all Kent's and they are getting bigger and bigger. For some reason we seem to have a butternut shaped pumpkin that has the coloring and pattern of a Kent. Could it be a crossbreed? How early is too early to pick them? I've had to throw a few unripened ones away not knowing.
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10 Sep 17, Mike (Australia - sub-tropical climate)
Look how long it states to grow them and don't pick before then. The plant vines will start to die off. Best to grow into the winter months - they will mature slower and you will be able to store them longer. Read the notes here and on the internet.
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10 Sep 17, Bru (Australia - temperate climate)
Hi, I grow butternuts fairly successfully, usually sowing seed from late September. Last years crop took a good 6 months (early April) before i could harvest (i can usually harvest way earlier than this). My suggestion is to give them at least 5 months from sowing, but keep an eye on the vine, once that starts dying off your pumpkins should be ready to harvest.
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19 Jul 17, Terry Forster (Australia - tropical climate)
I am looking for Gramma Pumpkin seeds. I Grew some of these years ago near Beaudesert.Has any body heard of these we made dessert pumpkin pie with them.
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21 Jul 17, Mike (Australia - sub-tropical climate)
Google "Gramma Pumpkin seeds" and you will find where to buy them. I can't put other company names on here. .
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09 Aug 17, Terry Forster (Australia - tropical climate)
I ordered them today, thanks for the advice.
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16 Jun 17, Dilsie Evans (Australia - temperate climate)
I've grown pumpkin for the first time, 6 pumpkins. Just cut up the largest, the centre seems a bit soft and has lots of seeds. Is this normal??
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19 Jun 17, Mike (Australia - sub-tropical climate)
You have the skin and then a layer of firm to hard pumpkin - then in the middle is soft tissue and seeds. You don't eat the soft tissue.
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05 Jun 17, Lynda Hagar (Australia - sub-tropical climate)
My pumpkins started to form late January. I preserved with them watering Ocassionally when needed. They are now a reasonable size now after all these months and the leaves are starting to die off. When the leaves are gone I will harvest the four pumpkins and allow the stalks to dry off before use. They are in a very sunny spot so have had sun all Autumn. I grew Jap pumpkins. I think some people call them Kent pumpkins. Anyway personally I would leave them alone until the leaves die off as long as they are getting plenty of sunshine. Good luck.
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20 Apr 17, Bronwynne Livingston (Australia - temperate climate)
Moved into a new house early Feb. Noticed pumpkin growing. Watered well and started flowering. Hand pollinated my first female in mid March and 4 weeks on have a delightfully larger-than-brick sized butternut growing. Have just last week pollinated a second vine which appears to have taken well too. Is this due to unseasonably warm weather this autumn? Or good rainfall?
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Just found this - commercial production. For efficient pollination and fruit set, there must be: both male and female flowers and bees to move pollen from male to female flowers. A number of factors can influence pollination, Cold and overcast days limit pollination activity of bees. Hot dry conditions desiccate pollen making it unviable. Rapid growth promotes earlier flowering. However, high temperatures, long days and high rates of nitrogen can result in: vigorous vegetative growth and few flowers and a higher proportion of male to female flowers. It is important to check the sex of the flowers. A ratio of 1 female to 7 male flowers is usually considered adequate. Flowers open early in the day and for one day only, and they close by mid afternoon. These periods are shorter under high temperatures. Flowers are most receptive to pollination in the morning when bee activity is usually the highest. Bees are necessary for pollination and must be active in the crop. Flowers require at least 12 bee visits for good pollination. If bees are not plentiful, introduce at least two hives per ha after female flowers appear and male flowers start producing pollen. Spread hives around the field outside the crop, preferably so that bees have to fly over the crop to get to another food source. Destroy flowering weeds around the crop.

- Mike

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