How to Grow Snowball

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Snowball

Brassica oleracea var. botrytis

vegetable

Snowball is a classic white cauliflower variety prized for its compact, pure-white curds and reliable production. It produces tight, uniform heads that are excellent for fresh use and cooking. This heirloom variety is a popular choice for both home gardeners and commercial growers.

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Example Snowball timeline · Pittsburgh, PA (Zone 6b)

Plant Snowball
Around Apr 17

Near Pittsburgh's average last spring frost.
Tend & protect
Late spring–summer

Watering, feeding, and pest-watch reminders.
Harvest Snowball
Around Jun 16

≈ 60 days after planting

Sample dates for Pittsburgh, PA. Sign up to get exact Snowball dates for your own zip code.

Growing Conditions

☀️

Sun: Full sun, 6-8 hours daily minimum; afternoon shade beneficial in hot climates

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Water: Consistent moisture; 1-1.5 inches per week. Keep soil evenly moist throughout growing season. Irregular watering causes yellowing and poor curd development.

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Spacing: 18-24 inches between plants, 24-36 inches between rows inches

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Days to maturity: 60-90 days from transplant (55-100 days from seed)

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Planting depth: 0.25 inches for seeds; transplants at same depth they were growing

Soil

Type: Well-draining loamy soil rich in organic matter

pH: 6.0-7.5

Amendments:

Compost aged manure boron (if deficient) nitrogen-rich fertilizer

Growing Zones

Find your zone →

Thrives in zones 3-9; grows year-round in cooler climates with successive plantings

2a 2b 3a 3b 4a 4b 5a 5b 6a 6b 7a 7b 8a 8b 9a 9b

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Growth Stages

Seedling

2-3 weeks

Tiny green leaves emerge from soil; cotyledons visible within 3-5 days

Keep soil consistently moist. Provide grow lights if indoors, 12-16 hours daily. Thin seedlings to prevent overcrowding. Start indoors 4-6 weeks before transplanting.

Vegetative (Transplant to Head Formation)

3-5 weeks

Plant develops 6-8 true leaves and strong root system; 4-6 inches tall. Leaves are blue-green and lobed.

Harden off transplants before planting outdoors. Water deeply and regularly. Begin light fertilizing every 2-3 weeks with balanced or nitrogen-rich fertilizer. Monitor for pests. Mulch around base to retain moisture.

Head Formation

3-4 weeks

Central head begins forming as tightly clustered white flower buds (curds) merge into a dome-shaped mass. Outer leaves grow larger and wrap around developing head.

Maintain consistent watering (critical during this stage). Apply high-nitrogen fertilizer every 2 weeks. Monitor soil moisture and add mulch to regulate temperature. Blanch heads by tying outer leaves over them if direct sun exposure is intense.

Curd Maturation

1-2 weeks

Head reaches full size (6-8 inches diameter typical), remains pure white, and becomes tightly curded and dense. Texture is firm and compact.

Continue regular watering to prevent bolting and maintain quality. Tie leaves loosely over head to protect from sunlight if curd is yellowing or developing green tint. Check daily for harvest readiness. Avoid nitrogen excess at this stage.

Harvest

Harvest window 5-10 days

Head is fully developed, firm, compact, and pure white. Small florets fit tightly together with no separation or yellowing.

Harvest when head reaches 6-8 inches diameter and is still very firm. Cut main head with 5-6 inches of stem attached using sharp knife. Some varieties produce side shoots for secondary harvest.

Companion Planting

Plan your garden →

Plant with:

Beets Celery Dill Garlic Onions Potatoes Spinach Thyme Chamomile

Avoid planting near:

Broccoli Cabbage Kale Other brassicas (within same season) Fennel Strawberries Tomatoes

Common Pests

Hand-pick larvae; use row covers before infestation; spray with Bacillus thuringiensis (Bt); neem oil
Install row covers; remove affected leaves; use pheromone traps; Bt spray
Strong water spray to dislodge; insecticidal soap; neem oil; encourage beneficial insects like ladybugs
Yellow sticky traps; row covers; insecticidal soap; neem oil spray
Crop rotation (3-year minimum); plant resistant varieties; improve drainage; raise soil pH to 7.0+; remove infected plants
Use disease-free seeds; crop rotation; improve air circulation; avoid overhead watering; remove affected leaves immediately

Uses

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Fresh & Cooked Vegetable

Culinary

Snowball cauliflower is versatile for steaming, roasting, stir-frying, boiling, and raw consumption. Its tender white curds are excellent in curries, gratins, pickled preparations, and vegetable medleys. [source]

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Cauliflower Rice & Low-Carb Dishes

Culinary

The dense, white curds are ideal for processing into cauliflower rice or cauliflower-based alternatives for grain-free and keto diets. [source]

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Nutritional & Phytonutrient Benefits

Medicinal

Cauliflower is rich in vitamin C, vitamin K, folate, and sulforaphane compounds with purported anti-inflammatory and anti-cancer properties. [source]

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Long-Term Food Storage

Household

Snowball heads can be blanched and frozen for 8-12 months, or pickled for shelf-stable storage, making it valuable for preserving seasonal harvests. [source]

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Garden Ecosystem Support

Wildlife

Flowering cauliflower plants left to bolt produce abundant small flowers that attract pollinators and beneficial insects, supporting garden biodiversity. [source]

This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.

Harvest Tips

Harvest when head is 6-8 inches diameter, firm, and pure white. Cut at the base with a sharp knife, leaving 5-6 inches of stem. Harvest in early morning for best quality. Can be harvested at smaller sizes (3-5 inches) for tender, delicate curds. Store unwashed heads in refrigerator crisper for 1-2 weeks, or freeze blanched pieces for longer storage.

Fun Facts

🌱 Snowball is an heirloom variety that has been grown since the 1880s and remains one of the most reliable and productive white cauliflower cultivars for home gardeners.
🌱 The white curd color in cauliflower is actually caused by the absence of chlorophyll due to the outer leaves naturally blanching (shading) the developing head from sunlight; gardeners often tie leaves for extra whiteness.
🌱 Cauliflower is a botanical anomaly—the edible 'curd' is actually a mass of unopened flower buds rather than a mature head of flowers or leaves, making it botanically unique among vegetables.

Gardening Terms

New to gardening? Learn about terms used in this guide:

Bolt Full Sun Heirloom Mulch Transplant True Leaves

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