SproutSmart
SproutSmart Intelligent Garden Sowing

Cipollini · Onion

Zone 4b Save Garden

Planting Schedule

Add Cipollini to your garden to build a schedule and get reminders.
MilestoneDate
Start IndoorsDirect Sow
Last FrostMay 13th
Transplant / Direct Sow OutdoorsMay 13th
Harvest BeginsAug 21st
Harvest EndsSep 27th

Crop Details

Transplant Conditions: Wait until soil reaches 45°F and nights stay above 35°F before moving outdoors. Harden off for 7 days first.
TraitValue
Days to Maturity100
Sun RequirementsFull Sun
Growth HabitBulbing
Support NeededNone
Planting DepthNormal
Germination Temp (°F)70
Min Soil Temp (°F)45
Min Night Temp (°F)35
Harden Off (days)7
Expert Note: For cipollini type onions, start early enough that plants establish before bulbing, then keep soil evenly moist until the tops start to fall over—consistent moisture boosts sweetness.