White Bermuda

Onion

75d to harvest

Sweet and delicately aromatic, White Bermuda onions form smooth, ivory-white bulbs with a gentle, clean bite that lingers pleasantly. At maturity they’re tender-fleshed and finely textured, ideal for turning into bright, mellow flavor in everyday dishes—especially when roasted for caramelized sweetness or used fresh for crisp, refreshing savor. Grow White Bermuda for reliable, uniform bulbs and a harvest that feels as elegant as it tastes.

Crop Dates

Growing note: In frost-free Zone 12a, grow this cool-season crop during the cooler dry season (October–February).

Milestone	Date
Start Indoors	—
Climate	Frost-Free Climate
Transplant / Sow Outdoors	Oct 1st
Harvest Begins	Dec 15th
Harvest Ends	Feb 28th

Crop Details

Trait	Value
Days to Maturity	75
Sun Requirements	Full Sun
Growth Habit	Upright
Support Needed	None
Planting Depth	Normal
Germination Temp (°F)	70
Min Soil Temp (°F)	45
Min Night Temp (°F)	28
Harden Off (days)	7

Frequently Asked Questions

What pest or disease most commonly affects Allium cepa (white Bermuda onion), and how can I manage it?

Onions (Allium cepa) are especially prone to onion downy mildew and purple blotch, which show up as pale lesions/gray fuzz or purple spots on leaves. Improve airflow and avoid overhead watering; remove and discard infected leaf tops early. If the problem keeps spreading, apply a labeled fungicide for onions at the first signs, following label rates and reapplication timing.

How often should I water during the main growing phase for white Bermuda onion?

During active bulbing (mid-to-late growth), keep soil evenly moist but not waterlogged—aim for about 1 inch of water per week, adjusted for rainfall and heat. Water deeply so moisture reaches the root zone, then let the surface dry slightly before watering again. Stop frequent watering and reduce irrigation as leaves begin to yellow and fall over near maturity to help bulbs cure.

How do I know when white Bermuda onion is ready to harvest?

Harvest when roughly half the tops have fallen over and the necks feel tight rather than soft. Bulbs should have developed their full size and the outer skins should be dry and papery. For best results, lift on a dry day and cure the bulbs in a well-ventilated, shaded area until outer skins are crisp.