Snowball Y Improved, Heirloom Cauliflower Seeds — Classic Self-Blanching White, Dense 6-Inch Heads, Mild Sweet Buttery Flavor | 70–80 Days

Snowball Y Improved (Brassica oleracea var. botrytis) is a widely trusted heirloom strain bred for dense, heavy heads and dependable performance in cooler seasons. A classic self-blanching variety — the large silvery-green leaves naturally curl around the developing head, helping it blanch to snow-white without extra labor. Expect dense, heavy 6-inch heads with mild, sweet, buttery flavor and strong performance in short-season spring or fall gardens. Suitable for greenhouse, garden plots, raised beds, containers, and fields. 1.0g / 200+ seeds per packet. 70–80 days to maturity.

• Botanical name: Brassica oleracea var. botrytis
• Days to maturity: 70–80 days
• Days to germination: 4–10 days
• Head color: Snow white
• Head size: Dense, heavy 6-inch heads
• Leaf color: Silvery green
• Flavor: Mild, sweet, and buttery
• Self-blanching: Yes — leaves naturally curl over head
• Soil: Rich, well-drained, consistent moisture; pH 6.0–6.8
• Temperature: 55–75°F growing; 65–75°F germination
• Packet size: 1.0g / 200+ seeds
• Sowing depth: ½ inch
• Plant spacing: 18–24 inches; rows 24–36 inches
• Plant height: 12–30 inches; width 18–24 inches
• Light: Full sun to partial shade
• Garden size: Greenhouse, garden plot, raised bed, container, fields
• USDA Zones: 2–11
• Type: Heirloom, open-pollinated, non-GMO, annual
• Pests: Cabbage worms, flea beetles, aphids, slugs; use row cover early, rotate crops, water at soil level

Self-Blanching — The Leaves Do the Work

Snowball Y Improved is a classic self-blanching strain — one of its most practical features for the home gardener. As the head develops, the large silvery-green outer leaves naturally curl inward and wrap around the curd, shading it from direct sunlight and producing a clean, snow-white finish without the need for manual tying. In cool growing conditions, this self-blanching habit is reliable and consistent. In intense sun or warm conditions, you can gently fold outer leaves over the developing head for the brightest white curds — but in most spring and fall gardens, the variety handles this on its own.

Dense, Heavy 6-Inch Heads — Short-Season Performance

Snowball Y Improved was bred specifically for dense, heavy head formation and dependable performance in short-season spring and fall gardens. The 70–80 day maturity window makes it one of the faster-maturing white cauliflower varieties, giving gardeners in northern climates a reliable window to produce full-sized heads before heat or frost ends the season. The dense, compact 6-inch heads are heavy for their size — firm, tight, and well-formed when grown in consistently cool, moist conditions. Harvest when heads are compact and firm, before curds loosen or begin to separate.

Mild, Sweet & Buttery Flavor

Snowball Y Improved’s flavor is mild, sweet, and distinctly buttery — more nuanced than generic supermarket cauliflower. The mild flavor makes it one of the most versatile cauliflower varieties in the kitchen, absorbing spices, sauces, and seasonings without competing with them. Excellent raw, roasted, steamed, stir-fried, or frozen for later use.

In the Kitchen

• Roasting: The standout use — cut into florets or steaks, toss with olive oil and seasoning, roast at 425°F until caramelized; the buttery flavor deepens beautifully
• Steaming: Steam florets until just tender; serve with brown butter, lemon, or cheese sauce
• Stir-fry: Cut into florets and stir-fry with garlic, ginger, and soy sauce over high heat
• Cauliflower rice: Pulse florets in a food processor; sauté as a low-carb rice substitute
• Raw crudités: Snow-white florets on a vegetable platter; the mild buttery flavor is excellent raw with dips
• Freezing: Blanch florets 3 minutes, shock in ice water, drain, and freeze; holds texture and flavor well for easy meals later

Growing Notes

Start indoors 4–6 weeks before transplanting for spring crops, or time a late-summer sowing for fall harvest. Sow ½ inch deep; keep seedlings evenly moist at 65–75°F; germination in 4–10 days. Harden off and transplant to garden once nights are mild. Space 18–24 inches apart in rows 24–36 inches apart in fertile, well-drained soil (pH 6.0–6.8) in full sun to partial shade. Keep moisture consistent — uneven watering causes stress and poorly formed heads. Snowball Y Improved is self-blanching; fold outer leaves over head in intense sun for brightest white. Harvest at 70–80 days when heads are compact, firm, and fully sized — before curds loosen or separate. Watch for cabbage worms, flea beetles, aphids, and slugs; use row covers early in the season. Rotate crops and water at soil level to reduce foliar disease pressure.

Frequently Asked Questions

What does self-blanching mean?

Self-blanching means the plant’s own leaves naturally curl over the developing head, shading it from sunlight and preventing the curd from yellowing or developing off-color. Standard white cauliflower varieties require the gardener to manually tie the outer leaves over the head — a time-consuming step that must be checked regularly. Snowball Y Improved’s leaves do this naturally in cool conditions, significantly reducing labor.

When should I harvest?

Harvest when the head is compact, firm, and fully sized — ideally before the curds begin to loosen or separate. A head that has gone past peak will have curds that are pulling apart and may show yellowing. When in doubt, harvest early — a slightly small firm head is better than an overripe loose one. Cut with a sharp knife, leaving a few wrapper leaves attached for protection during handling.

Can I grow Snowball Y Improved in a container?

Yes — use a container at least 12–14 inches deep and wide. One plant per container. Containers dry out faster than garden beds — check moisture daily and water consistently, as cauliflower is sensitive to drought stress. Feed with balanced fertilizer every 2–3 weeks.

Packed and shipped by Box Garden Seeds LLC — heirloom seeds grown without GMOs, selected for flavor, resilience, and your garden’s success.