Cucurbita maxima 'Atlantic Giant'
vegetableThe world-record pumpkin. Atlantic Giant holds multiple world-record titles, with the record now exceeding 2,800 pounds and is the variety for competitive giant pumpkin growing. Average home-grown fruits reach 100 to 300 pounds. Growing an Atlantic Giant requires dedicated bed space, intensive care, and significant compost inputs — but the result is an unforgettable garden spectacle.
Sun
full sun
Water
Every 2 days
Harvest
~130 days
Difficulty
hard
Lifecycle
annual
One season, then done
Spacing
15-20 ft per plant
Planting Depth
1 in
Soil pH
6.0-7.0
Soil Type
Very rich, well-draining
Hardiness Zones
Zones 3 – 10
Grown as an annual — this range is its winter hardiness, but you can grow it for a single season in any zone.
When to Fertilize
Extremely heavy feeder — weekly feeding with balanced fertilizer; foliar spray with fish emulsion and kelp weekly; extra phosphorus at fruit set
Fertilizer
Very rich compost bed; balanced granular weekly; foliar fish emulsion and kelp weekly through the season
Start indoors 3 to 4 weeks before last frost. Transplant into a prepared bed enriched with several cubic yards of compost. Allow 15 to 20 feet of space per plant. Train the main vine and remove all secondary vines. Choose one fruit per plant once several have set and remove all others. Water daily — giant pumpkins are extremely thirsty. Keep a shade cloth handy to prevent sunscald on the skin.
Start seeds indoors
Mar 18
Transplant outdoors
Apr 29
Projected first harvest
Sep 6
Good neighbors that attract beneficial insects or deter pests
Proactive ways to stop trouble before it starts — tap a name with an arrow for its full guide
Bury vine nodes in soil as the vine extends so borers cannot kill the whole plant; Bt stem injection
Daily inspection is essential at this scale; destroy egg masses; kaolin clay spray
Apply neem oil or sulfur preventively; enormous leaf area is susceptible
Shade cloth or wet burlap over developing fruit in intense summer heat
Harvest when the skin has fully hardened and the stem is completely dry and corky. The orange color should be deep and even. Use a dolly or multiple people to move — even modest home specimens weigh 50 to 150 pounds. Cure for 2 weeks. Atlantic Giant flesh is edible but stringy and not flavorful — these are grown for spectacle, not the kitchen.
As a garden plant: extraordinary conversation-starter and community attraction. Flesh is technically edible — high in beta-carotene and fiber — but stringy texture limits culinary appeal. Seeds from giant pumpkins are particularly large and excellent roasted.
For educational and informational purposes only — HomeSown is not medical, health, or other professional advice. Always positively identify any plant before handling or eating it; some plants, and some parts of otherwise-edible plants, are toxic. Consult a qualified professional before consuming or otherwise using any plant, especially if you are pregnant, nursing, taking medication, or have a health condition.