SproutSmart
SproutSmart Intelligent Garden Sowing

White Sweet Spanish · Onion

Zone 1b Save Garden

Planting Schedule

Add White Sweet Spanish to your garden to build a schedule and get reminders.
MilestoneDate
Start IndoorsMar 23rd
Last FrostJun 1st
Transplant / Direct Sow OutdoorsJun 1st
Harvest BeginsSep 14th
Harvest EndsAug 1st

Crop Details

Transplant Conditions: Wait until soil reaches 45°F and nights stay above 35°F before moving outdoors. Harden off for 5 days first.
TraitValue
Days to Maturity105
Sun RequirementsFull Sun
Growth HabitBulbing
Support NeededNone
Planting DepthNormal
Germination Temp (°F)75
Min Soil Temp (°F)45
Min Night Temp (°F)35
Harden Off (days)5
Expert Note: For large globe bulbs, keep transplants/sets evenly watered during bulb formation and avoid nitrogen-heavy feeding after the tops establish.