How to Grow Autumn Giant
Autumn Giant
Brassica oleracea var. botrytis
vegetableAutumn Giant is a large-headed cauliflower variety bred for fall and winter harvest in cool climates. It produces substantial white curds on robust plants with excellent disease resistance and reliability. This variety is a favorite among market gardeners and home growers seeking substantial yields in autumn.
When should you plant Autumn Giant in your zone?
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Example Autumn Giant timeline · Pittsburgh, PA (Zone 6b)
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Plant Autumn Giant
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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Harvest Autumn Giant
Around Aug 5≈ 110 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Autumn Giant dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 3-8, with best performance in cooler autumn climates
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Seedling
3-4 weeksTiny cotyledons emerge, developing into rough oval leaves. Plant is very delicate.
Keep soil consistently moist. Provide 14-16 hours of light daily under grow lights if starting indoors. Maintain temperature around 65-70°F. Thin seedlings to prevent crowding.
Transplant/Establishment
2-3 weeksSeedlings develop 4-6 true leaves. Plants are ready for hardening off and transplanting outdoors.
Harden off gradually over 7-10 days. Transplant when 4-6 true leaves are visible. Avoid root disturbance. Use balanced fertilizer. Protect young transplants from strong wind and direct sun initially.
Vegetative Growth
6-8 weeksPlant develops large, gray-green outer leaves. Stem thickens and root system expands. No head formation yet.
Provide consistent nitrogen fertility. Water deeply and regularly. Mulch around base to retain moisture and regulate soil temperature. Monitor for cabbage moths and other pests. Side-dress with nitrogen-rich fertilizer every 3-4 weeks if needed.
Curd Initiation & Development
6-8 weeksCenter of plant begins forming the white curd head composed of unopened flower buds. Head gradually enlarges.
Maintain consistent moisture to prevent cracking. Blanch curds by folding outer leaves over head to keep it white and tender. Reduce nitrogen to prevent excessive leaf growth. Ensure boron availability to prevent brown spots in curd.
Harvest Readiness
Variable based on weather; typically 2-4 weeks harvest windowCurd reaches 8-10 inches diameter, remains firm and compact with tight florets. Outer leaves begin to yellow.
Begin harvesting when curd is firm and dense but before florets loosen. Continue to monitor soil moisture. Harvest in early morning for best quality. Cut at base with sharp knife.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Use floating row covers until flowering begins. Install pheromone traps. Spray with Bacillus thuringiensis (Bt) if larvae detected. Hand-pick egg clusters from leaf undersides.
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Apply Bt spray at first sign of damage. Use row covers. Encourage parasitic wasps. Remove affected leaves.
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Use row covers for seedlings and transplants. Dust with diatomaceous earth. Spray neem oil if damage appears. Remove plant debris where beetles overwinter.
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Spray strong water spray to dislodge. Use insecticidal soap. Apply neem oil. Introduce natural predators like ladybugs.
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Use disease-free seeds. Avoid overhead watering. Remove infected leaves promptly. Practice crop rotation. Ensure good air circulation.
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Use resistant varieties if available. Improve drainage and soil pH to 7.0+. Remove infected plants entirely. Avoid planting brassicas in same location for 4+ years.
Uses
Roasting & Cooking
CulinaryAutumn Giant's large curds are ideal for roasting, steaming, boiling, or adding to curries and gratins. The florets hold their shape well during cooking and develop a sweet, nutty flavor when roasted. [source]
Fresh Raw Consumption
CulinaryTender raw florets are crisp and sweet, perfect for crudités, salads, and fresh eating straight from the garden. The dense head provides substantial harvest for feeding families. [source]
Nutritional Health Benefits
MedicinalCauliflower is rich in vitamin C, vitamin K, folate, and glucosinolates (cancer-fighting compounds released when chewed or cooked). Contains fiber and antioxidants that support immune and digestive health. [source]
Preservation & Storage
HouseholdAutumn Giant's large heads freeze exceptionally well when blanched, making it ideal for preserving fall harvests for winter use. Can also be pickled or processed into cauliflower rice. [source]
Pollinator & Beneficial Insect Support
WildlifeIf left unharvested, flowering cauliflower plants attract bees, butterflies, and beneficial insects. The flowers provide nectar and pollen during late season when other food sources are scarce. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Autumn Giant is ready to harvest when the head is large (8-10 inches diameter), firm, and compact with tight florets. Harvest in early morning when plants are fully hydrated for best quality. Cut the main head cleanly at the base using a sharp knife. Some secondary smaller heads may develop after the main harvest is cut. Cool immediately after cutting. Store at 32-40°F with high humidity for 2-4 weeks.
Fun Facts
- 🌱 Autumn Giant was specifically bred to mature in fall conditions, allowing growers to harvest in cool weather when cauliflower quality is at its peak—cool temperatures enhance sweetness and keep curds tight.
- 🌱 The head of cauliflower is actually an edible flower bud cluster called a 'curd,' composed of hundreds of unopened flower florets. If left to flower, it produces small yellow flowers.
- 🌱 Cauliflower is a relatively recent vegetable development—the modern cultivated forms only emerged in the 18th-19th centuries in Italy, making it much younger than cabbage or kale.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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