SproutSmart
SproutSmart Intelligent Garden Sowing

Non-Bolting Red · Onion

Zone 10a Save Garden

Planting Schedule

Add Non-Bolting Red to your garden to build a schedule and get reminders.
MilestoneDate
Start IndoorsDec 5th
Last FrostJan 16th
Transplant / Direct Sow OutdoorsJan 9th
Harvest BeginsApr 9th
Harvest EndsDec 19th

Crop Details

Transplant Conditions: Wait until soil reaches 45°F and nights stay above 28°F before moving outdoors. Harden off for 7 days first.
TraitValue
Days to Maturity90
Sun RequirementsFull Sun
Growth HabitBulbing
Support NeededNone
Planting DepthNormal
Germination Temp (°F)70
Min Soil Temp (°F)45
Min Night Temp (°F)28
Harden Off (days)7
Expert Note: For spring success, keep onions weed-free and aim for steady growth after planting—avoid drought stress to reduce the chance of bolting.