Ruby Ring F1

Family: Amaryllidaceae Vegetable

Planting Schedule

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Sink your senses into Ruby Ring F1’s rich, jewel-toned bulbs—deep ruby-red skins wrapped in crisp, papery layers that gleam with a subtle ringed pattern.

Inside, the flesh turns bright, clean white with a gentle blush, offering a firm, snappy bite that holds its character in storage. A true red storage onion for home gardeners, it’s prized for dependable keeping and bold allium flavor that shines in sauces, roasting, and pickling.

Light: Full SunMaturity: 120 DaysHabit: Bulbing

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Ruby Ring F1 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	Protected Environment Only
Zone 2b	Protected Environment Only
Zone 3a	Protected Environment Only
Zone 3b	Direct Sow	May 19th	Sep 16th – Sep 21st
Zone 4a	Direct Sow	May 15th	Sep 12th – Sep 24th
Zone 4b	Direct Sow	May 13th	Sep 10th – Sep 27th
Zone 5a	Direct Sow	May 8th	Sep 5th – Sep 30th
Zone 5b	Direct Sow	May 4th	Sep 1st – Oct 5th
Zone 6a	Direct Sow	May 1st	Aug 29th – Oct 10th
Zone 6b	Direct Sow	Apr 25th	Aug 23rd – Oct 16th
Zone 7a	Direct Sow	Apr 20th	Aug 18th – Oct 20th
Zone 7b	Direct Sow	Apr 10th	Aug 8th – Oct 28th
Zone 8a	Direct Sow	Apr 1st	Jul 30th – Nov 5th
Zone 8b	Direct Sow	Mar 23rd	Jul 21st – Nov 12th
Zone 9a	Direct Sow	Mar 6th	Jul 4th – Nov 26th
Zone 9b	Direct Sow	Feb 9th	Jun 9th – Dec 9th
Zone 10a	—	Oct 1st	Jan 29th – Feb 28th
Zone 10b	—	Oct 1st	Jan 29th – Feb 28th
Zone 11a	—	Oct 1st	Jan 29th – Feb 28th
Zone 11b	—	Oct 1st	Jan 29th – Feb 28th
Zone 12a	—	Oct 1st	Jan 29th – Feb 28th
Zone 12b	—	Oct 1st	Jan 29th – Feb 28th
Zone 13a	—	Oct 1st	Jan 29th – Feb 28th
Zone 13b	—	Oct 1st	Jan 29th – Feb 28th

Crop Details

Trait	Value
Days to Maturity	120
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)	35
Harden Off (days)	Not Required

Culinary Notes

Chef's Note

Ruby Ring F1 is built for the long game: it delivers a sharp, vivid red-onion bite up front, then cooks down into sweet, structured ribbons instead of collapsing. It’s the kind of storage onion that makes roasted pans and pickling brines taste like you cared—sharp when raw, silky at the edges when hot.

Best Uses

slow-cooked red onion jam that stays glossy and sliceable
high-heat roasting for caramelized edges and a meaty melt
pickling for crisp rings that keep their snap
thickening sauces/gravies where you want allium flavor without turning to mush

Flavor Profile

bold allium bite with sweet red-onion lift firm, snappy crunch when fresh clean, slightly grassy aroma that turns mellow when cooked storage-onion depth without getting woody

Kitchen Pairings

balsamic vinegar goat cheese whole grain mustard beef or lamb butter or olive oil thyme

Frequently Asked Questions

How do I manage onion (Allium cepa) pests or diseases like thrips or downy mildew?

For thrips, check leaf undersides weekly; leaves that look silvery or streaked often signal heavy feeding. Treat early with insecticidal soap or spinosad, and remove any badly affected foliage to reduce spread. For downy mildew (gray-purple fuzzy growth on leaves), avoid watering the foliage, improve airflow, and apply a labeled fungicide as soon as symptoms appear—once onion tops are heavily affected, bulbs often don’t size well.

How often should I water Allium cepa during the main growing phase for good bulb sizing?

Water deeply about 1 inch per week during active leaf growth, but adjust to keep soil evenly moist at the 2–4 inch depth. Stop frequent watering as bulbs start to swell and let the soil dry slightly between waterings so skins can mature; constantly wet soil encourages rotting and split bulbs.

When is Allium cepa ready to harvest, and what signs should I look for?

Harvest when about 50–75% of the onion tops have fallen over and the necks feel tighter rather than floppy. Lift bulbs gently (don’t pull hard on the tops), then cure in a warm, airy spot with dry airflow for 1–2 weeks until skins are papery and roots are dry.