How to Grow Snowball Y Improved Cauliflower
Brassica oleracea var. botrytis 'Snowball Y Improved'
Snowball Y Improved Cauliflower is a reliable cool-season brassica prized for its compact head size and improved disease resistance. Gardeners cultivate this variety to enjoy fresh, tender heads in home gardens while benefiting from better protection against common soil-borne issues like clubroot.
Starting Snowball Y Improved Cauliflower: indoors or direct sow?
🏠 Start indoors 10 weeks before your last spring frost, then move the seedlings outside.
Start seeds indoors early enough for a strong start, then transplant seedlings outdoors once they are hardy and soil temperatures have stabilized.
Soil, care & harvest
Prepare your garden bed by loosening the soil to ensure good drainage and mix in compost. Adjust soil pH to fall between 6.0 and 7.0 for optimal growth. Sow seeds indoors 8-10 weeks before the last spring frost or direct sow outdoors 2-6 weeks prior. Bury seeds about 1/4 inch deep, as they typically germinate within 5 to 10 days.
Space plants 18 to 24 inches apart in rows to allow proper airflow and head development. Keep the soil consistently moist with 1 to 1.5 inches of water weekly; consistent moisture is key to preventing curd splitting. Apply a thick layer of mulch around the base to retain moisture and suppress weeds, feeding regularly with balanced fertilizer if growth slows.
Watch for cabbage worms, aphids, flea beetles, and maggots, using row covers or insecticidal soap for control. Monitor for clubroot, black rot, downy mildew, and bacterial soft rot by ensuring proper drainage and avoiding overhead watering. Harvest heads when they reach firm size, typically 68 to 75 days after sowing, cutting the stalk about an inch above the head.
When to Plant Snowball Y Improved Cauliflower
Planting windows vary by USDA hardiness zone. Look up yours by ZIP code.
| Zone | Start Indoors | Direct Sow | Harvest |
|---|---|---|---|
| Zone 1 | April – May | June – July | August – September |
| Zone 2 | April – May | May – July | July – September |
| Zone 3 | March – April | May – June | July – October |
| Zone 4 | March – April | April – June | July – October |
| Zone 5 | February – March | April – May | June – November |
| Zone 6 | February – March | April – May | June – November |
| Zone 7 | February – March | March – May | May – November |
| Zone 8 | January – February | March – April | May – December |
| Zone 9 | January | February – March | April – December |
| Zone 10 | January | January – March | March – December |
| Zone 11 | January | January – February | February – December |
| Zone 12 | January | January – February | February – December |
| Zone 13 | January | January – February | February – December |
Companion Plants for Snowball Y Improved Cauliflower
✓ Good companions
Repels cabbage white butterflies and provides natural pest deterrent
Repels aphids and cabbage worms while improving soil health
Attracts beneficial insects like parasitic wasps that prey on cabbage worms and aphids
Efficient use of space as shallow-rooted crop, ready to harvest before cauliflower matures
Repels cabbage moths, aphids, and other brassica pests with strong scent
Acts as trap crop for aphids and flea beetles, drawing them away from cauliflower
Repels cabbage flies, aphids, and cabbage worms with sulfur compounds
Provides living mulch, conserves soil moisture, and doesn't compete for nutrients
✗ Keep away from
May shade cauliflower and compete for nutrients, potentially reducing head formation
Competes for nutrients and may stunt cauliflower growth due to similar feeding requirements
Allelopathic effects inhibit brassica growth and both are heavy feeders competing for nutrients
Nutrition Facts
Per 100g serving (USDA FoodData Central)
