Crystal White Wax

Family: Amaryllidaceae Vegetable

Crisp, luminous bulbs—crystal white as moonlit porcelain—promise a clean, sweet-on-the-palate flavor with a gentle bite that lingers pleasantly.

At maturity, Crystal White Wax forms smooth, firm bulbs with a satiny skin and a satisfying snap, ideal for fresh use when you want brightness without harshness. Grow for salads, quick pickles, and mellow, aromatic sauces where its mild character shines through.

Light: Full SunMaturity: 90 DaysHabit: Bulbing

Botanical illustration of Crystal White Wax

Planting schedules and alerts are optimized for Columbus (Zone 6b).

Crop Dates

Milestone	Date
Start Indoors	Direct Sow
Last Frost	Apr 25th
Transplant / Sow Outdoors	Apr 25th
Harvest Begins	Jul 24th
Harvest Ends	Oct 16th

Crop Details

Trait	Value
Days to Maturity	90
Sun Requirements	Full Sun
Growth Habit	Bulbing
Support Needed	None
Planting Depth	Normal
Germination Temp (°F)	70
Min Soil Temp (°F)	45
Min Night Temp (°F)	32
Harden Off (days)	Not Required

Culinary Notes

Chef's Note

Crystal White Wax is bred for a polite, sweet flavor and that pleasing snap—so it earns its keep anywhere onion is asked to be bright instead of bitey. Use it thin and raw for that crisp, porcelain-like crunch, or cook it fast in butter for sweetness without losing the onion’s clean aromatic character.

Best Uses

thin raw slices in salads or on sandwiches where it stays snappy and luminous
quick pickles (shallow brine) for a crisp, sweet-tart crunch
fast-sautéed aromatics that turn silky without going sharp or sulfurous
mild onion jam or glaze where you want colorless sweetness and a glossy finish

Flavor Profile

clean, sweet-on-the-palate onion flavor gentle bite with a crisp, satiny snap quick-melting tenderness when cooked bright, lightly aromatic finish

Kitchen Pairings

butter white wine vinegar honey thyme gruyère chicken

Frequently Asked Questions

What pest or disease commonly affects Allium cepa (Crystal White Wax onions) and how can I manage it?

Onions (Allium cepa) are especially prone to downy mildew (Peronospora destructor), which shows as gray-purple fuzz on leaves and yellowing that spreads during humid weather. Remove and discard infected leaves, improve airflow by spacing bulbs at planting, and water at the soil line (not the foliage). If outbreaks keep recurring, switch to a preventive onion-appropriate fungicide labeled for downy mildew and begin applications early after damp stretches.

How often should I water Allium cepa during the main growing phase?

During active leaf growth (about weeks 3–8), keep soil consistently moist but not soggy—aim for roughly 1 inch of water per week, split into 2–3 sessions during hot spells. Once bulbs begin enlarging (midseason), taper to prevent rot: water only when the top 1 inch of soil dries, then irrigate deeply. Stop watering about 1–2 weeks before harvest so the necks can dry down.

How do I tell when Crystal White Wax onions are ready to harvest?

Harvest when about half the tops have naturally fallen over and the necks are starting to dry, typically around 90 days for Allium cepa. Avoid waiting for complete collapse—pulling earlier keeps bulbs firmer for fresh use. Lift onions carefully with a fork, cure them in a warm, airy spot out of direct sun until the outer skins feel papery and the necks are tight.