SproutSmart
SproutSmart Intelligent Garden Sowing

Bianca Di Maggio · Onion

Zone 4b Save Garden

Planting Schedule

Add Bianca Di Maggio to your garden to build a schedule and get reminders.
MilestoneDate
Start IndoorsApr 1st
Last FrostMay 13th
Transplant / Direct Sow OutdoorsMay 6th
Harvest BeginsJul 20th
Harvest EndsSep 27th

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 Maturity75
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 sweet Cipollini-style onions, avoid drought stress early and harvest once tops flop—then cure briefly before pickling.