Red Bull F1

Onion

Zone 9b Save Garden

🌱 110d to harvest Bulbing

Sweet at first glance, Red Bull F1 reveals a bold, red-tinged bite that lingers with a clean, oniony warmth—ideal for gardeners w…

Crop Dates

Milestone	Date
Start Indoors	Dec 29th
Last Frost	Feb 9th
Transplant / Sow Outdoors	Feb 9th
Harvest Begins	May 30th
Harvest Ends	Dec 9th

Crop Details

Trait	Value
Days to Maturity	110
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)	7

Recommended Companions

Amsterdam Forcing Carrot

Naval Carrot

Frequently Asked Questions

What’s the most common disease issue for Allium cepa (onion) and how do I prevent it?

Onions commonly suffer from purple blotch and neck rot (often after prolonged damp weather). Start with clean, well-drained beds and avoid wetting the foliage; water at the soil line and space plants for airflow. If you see purple blotches, remove badly affected leaves and apply a labeled fungicide suitable for onions according to the product directions.

How often should I water Allium cepa during the main bulb-forming stage?

During bulbing (when the plants are actively swelling), keep soil consistently evenly moist but not soggy—aim for about 1 inch (2.5 cm) of water per week, adjusted for rainfall and heat. Let the top 1 inch of soil dry slightly between waterings to reduce rot risk, especially around the neck. Once tops start falling over near maturity, gradually reduce watering to help bulbs cure.

How can I tell when Allium cepa is ready to harvest?

Harvest when about half of the onion tops have naturally fallen over and the necks are starting to dry and tighten. Bulbs should have firm skins with good color, and the outer layer should feel papery. Lift carefully and stop harvesting if bulbs are still growing upright and the necks are soft.

Sweet at first glance, Red Bull F1 reveals a bold, red-tinged bite that lingers with a clean, oniony warmth—ideal for gardeners who love storage onions with real personality. The bulbs form a compact, well-filled shape with deep ruby-red outer skins and a crisp, firm texture that holds beautifully through the season. Grow Red Bull F1 for reliable long storage and standout flavor in savory staples, from roasted sweetness to robust sauces and pickled accents.

Sowing Tips

Transplant Conditions

Wait until soil reaches 45°F and nights stay above 35°F before moving outdoors. Harden off for 7 days first.

Expert Note

For best red color and long storage, keep soil evenly moist while bulbing starts, then taper irrigation to avoid watery bulbs.