The plan behind the story · Ron Wallace grew the world's heaviest pumpkin in his first season under glass
Your first pumpkin patch, from a bare corner to a harvest
One growing season, set out stage by stage. If you are getting going, it ends with a few pumpkins or squash cured and stored for winter. If you already grow, it ends with one giant on a weigh-off scale.
Why this works
Ron Wallace’s 3,156lb (1,431.5kg) world-record pumpkin and Ian Paton’s 2,856lb Bagheera, a week earlier, both started the same way as an ordinary pumpkin: one seed, a warm spring start, and a long season of water and attention. Paton told Guinness World Records that a pumpkin takes about 120 days to grow from golf-ball size. Wallace said 2026 was his first year in a greenhouse, and the weather was near perfect for most of it.
Growing gets you out of doors through the year. A 2023 randomised trial by the University of Colorado Boulder gave 291 adults who had never gardened a community plot, seeds and a short course. By autumn they were active for about 42 minutes more a week than a group still waiting for plots, were eating about 1.4g more fibre a day, and reported less stress and anxiety. Take it as a reason to try, not a promise.
Before you start
- Pick the spot. The RHS (Royal Horticultural Society) asks for a warm, sunny, sheltered site with fertile soil that holds moisture but does not waterlog. No bed? A container at least 45cm (18in) wide, with peat-free compost, suits a compact variety.
- Know your frost dates. Pumpkins are killed by frost. In the UK, plants go out in late May or early June; in the US, after frost danger has passed and the soil has warmed (mid-May in Maryland, later further north). Your local extension service or allotment neighbours will know yours.
- Get the kit. Garden compost, a few 7.5cm pots, seed compost, a watering can, a tile or board per fruit, and a notebook.
- Look after your back. Lift compost bags and pumpkins with bent knees and help. If you have a back, heart or joint problem, or have not been active for a while, check with your GP (family doctor) before heavy digging.
The plan
| Week | Do this | How often | Notes |
|---|---|---|---|
| October to November (getting going) | Clear the spot and spread compost at least 5cm (2in) deep over it. | Once | The RHS no-dig method: plant into it in spring. |
| October to November (already growing) | Prepare a patch with rows 8 to 12ft (2.4 to 3.7m) apart and choose a weigh-off for next autumn. | Once | University of Maryland Extension spacing for giants. |
| Winter (getting going) | Choose one compact pumpkin or winter squash and buy seed. | Once | Bush kinds need about 90cm (3ft); trailing ones 1.5m (5ft). |
| Winter (already growing) | Get ‘Atlantic Giant’ seed and plan a start date about 120 days before your weigh-off, plus time to set fruit. | Once | Write the date at the top of your log. |
| Mid-to-late April (both) | Sow one seed per 7.5cm pot, on its side and 1cm deep, at 18 to 21C (64 to 70F). | Once, with a spare | Good light; keep indoors until frost has passed. |
| Late May to June (getting going) | Harden off for a week, then plant out. Mulch, leaving a gap round the stem. | Once | Sink a 15cm pot beside the plant to water through. |
| Late May to June (already growing) | Plant out on a mound; if sowing direct, keep the strongest of 3 to 5 seedlings. | Once | Protect from wind and cold nights with fleece. |
| Summer (getting going) | Water deeply at the roots, early or late in the day; put a tile under each fruit. Keep two or three fruits per plant. | Two or three times a week; daily in heat | Rainwater where you can. |
| Summer (already growing) | When fruits are 6 to 8in (15 to 20cm), keep the best one, remove the rest and new flowers, and pinch back vine ends. Feed with a high-potassium feed every 10 to 14 days. | Daily checks | Over-feeding can split fruit. Rotate gently on cardboard each week. |
| September to October (both) | Cut before the first frost with 10cm (4in) of stem. Cure in the sun for a week to 10 days. | Once | Giants: book help and a trailer for the weigh-off. |
If it goes wrong
- Flowers but no fruit: bees carry pollen between male and female flowers, and set is poor in wet weather when bees stay home. Avoid pesticides while the plant is flowering.
- Seedlings collapse after planting out: they went out too early or too cold. Sow a spare in early May; there is time.
- Fruit rotting underneath: lift it on to a tile, board or cardboard.
- White powder on the leaves: it may be powdery mildew, one of the problems University of Maryland Extension lists for pumpkins. Its pages and the RHS website have advice.
- It all fails: a lot of growers have “off years”, Ron Wallace among them. Note what happened and go again.
Track it
One line a week: date, water given, the weather, flowers open, and the size of each fruit (a tape measure round the widest point is enough). Photograph the plant on the same day each week. At the end, weigh what you harvest, even on the bathroom scales.
What next
Store your cured pumpkins somewhere airy at 10 to 15C (50 to 60F) and cook with them through the winter; our guide to fibre and gut health has the reasons to eat more vegetables. If you want more room and company, look at an allotment or a community garden plot; men’s sheds, walking groups and clubs covers other ways to find people near you.
General information, not medical advice. Check with your GP before starting a new exercise programme.