White Bermuda (Early Grano)

Family: Amaryllidaceae Vegetable

Planting Schedule

Provide your location or planting zone to unlock dates and add White Bermuda (Early Grano) to a garden.

Sweetly aromatic and cleanly mild, White Bermuda (Early Grano) forms crisp, snow-white bulbs with a tender, fine-grained bite that stays pleasantly delicate from harvest through storage.

The skins are thin and bright, the flesh crisp and juicy, making this an ideal choice for fresh use and for turning into smooth, fragrant preparations where its gentle character shines. Grow it for reliable, early-season performance—an elegant white onion that looks as good as it tastes.

Light: Full SunMaturity: 90 DaysHabit: Bulbing

Botanical illustration of White Bermuda (Early Grano)

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White Bermuda (Early Grano) Planting Dates by USDA Zone

Estimated US hardiness-zone windows for sow, transplant, and harvest. Enter a US ZIP above for exact local dates, or open a zone below.

Zone	Start Indoors	Sow / Transplant	Harvest
Zone 1a	Protected Environment Only
Zone 1b	Protected Environment Only
Zone 2a	Direct Sow	May 25th	Aug 23rd – Aug 29th
Zone 2b	Direct Sow	May 15th	Aug 13th – Aug 25th
Zone 3a	Direct Sow	May 15th	Aug 13th – Sep 1st
Zone 3b	Direct Sow	May 19th	Aug 17th – Sep 21st
Zone 4a	Direct Sow	May 15th	Aug 13th – Sep 24th
Zone 4b	Direct Sow	May 13th	Aug 11th – Sep 27th
Zone 5a	Direct Sow	May 8th	Aug 6th – Sep 30th
Zone 5b	Direct Sow	May 4th	Aug 2nd – Oct 5th
Zone 6a	Direct Sow	May 1st	Jul 30th – Oct 10th
Zone 6b	Direct Sow	Apr 25th	Jul 24th – Oct 16th
Zone 7a	Direct Sow	Apr 20th	Jul 19th – Oct 20th
Zone 7b	Direct Sow	Apr 10th	Jul 9th – Oct 28th
Zone 8a	Direct Sow	Apr 1st	Jun 30th – Nov 5th
Zone 8b	Direct Sow	Mar 23rd	Jun 21st – Nov 12th
Zone 9a	Direct Sow	Mar 6th	Jun 4th – Nov 26th
Zone 9b	Direct Sow	Feb 9th	May 10th – Dec 9th
Zone 10a	—	Oct 1st	Dec 30th – Feb 28th
Zone 10b	—	Oct 1st	Dec 30th – Feb 28th
Zone 11a	—	Oct 1st	Dec 30th – Feb 28th
Zone 11b	—	Oct 1st	Dec 30th – Feb 28th
Zone 12a	—	Oct 1st	Dec 30th – Feb 28th
Zone 12b	—	Oct 1st	Dec 30th – Feb 28th
Zone 13a	—	Oct 1st	Dec 30th – Feb 28th
Zone 13b	—	Oct 1st	Dec 30th – Feb 28th

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)	40
Min Night Temp (°F)	35
Harden Off (days)	7

Culinary Notes

Chef's Note

This early white onion is built for restraint: it stays sweet and crisp, so it won’t bully salads or sandwiches with harsh allium bite. Use it either raw in paper-thin slices or cooked just until translucent for a clean, fragrant sweetness that behaves beautifully in buttery sauces.

Best Uses

thin slicing for raw applications where you want crunch without bite
quick pickling or escabeche—keeps its pale, delicate character
smooth sauté base for butter sauces and pan drippings
gentle roasting to turn its mild sugars jammy without going sharp

Flavor Profile

sweetly mild allium sweetness crisp, fine-grained bite clean, lightly aromatic finish juicy and tender when fresh

Kitchen Pairings

butter olive oil fresh thyme white wine vinegar gruyère chicken stock

Frequently Asked Questions

How do I manage onion (Allium cepa) problems like downy mildew and botrytis blight?

Onions (Allium cepa) commonly develop downy mildew and neck/foliar blights in cool, wet weather. Improve airflow with wider spacing, avoid watering the foliage (water at the soil line), and remove any yellowing or collapsing leaves quickly. If the problem persists, use an onion-appropriate fungicide and follow the label timing starting as soon as you see mottling or gray/purple lesions.

What watering schedule keeps Allium cepa bulbs sizing well during the 60–90 day growing phase?

During active bulb bulking (roughly weeks 7–13), keep the soil consistently moist but not soggy—aim for about 1 inch of water per week, adjusting for heat and rainfall. Let the top 1–2 inches of soil dry slightly between waterings to prevent rot, then water deeply to reach the onion roots. Stop or sharply reduce watering once tops begin to yellow and fall over, so the bulbs cure better.

When is Allium cepa (white Bermuda-type) ready to harvest?

Harvest when 50–70% of the tops have fallen over and the necks feel tight rather than soft. For many 90-day plantings, this is around 90 days from transplanting/typical sowing timeline, but use the top condition as your main guide. Lift on a dry day, cure the bulbs in a warm, airy spot for 1–2 weeks, and then trim roots and tops for storage.