SproutSmart
SproutSmart Intelligent Garden Sowing

Red Wethersfield · Onion

Planting Schedule

Add Red Wethersfield to your garden to build a schedule and get reminders.
MilestoneDate
Start IndoorsDec 15th
Last FrostFeb 9th
Transplant / Direct Sow OutdoorsMar 23rd
Harvest BeginsJul 21st
Harvest EndsDec 9th

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 Maturity120
Sun Requirements☀️ Full 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 long storage onions like Wethersfield, transplant/plant early so bulbs form before peak summer heat, and avoid delaying past cool-season growth.