SproutSmart
SproutSmart Intelligent Garden Sowing

Yellow Sweet Spanish · Onion

Planting Schedule

Add Yellow Sweet Spanish to your garden to build a schedule and get reminders.
MilestoneDate
Start IndoorsMar 20th
Last FrostMay 1st
Transplant / Direct Sow OutdoorsMay 1st
Harvest BeginsAug 29th
Harvest EndsOct 10th

Crop Details

Transplant Conditions: Wait until soil reaches 50°F and nights stay above 35°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)50
Min Night Temp (°F)35
Harden Off (days)7
Expert Note: For long-day Spanish onions, grow strong seedlings (sturdy tops, not tall/spindly) and transplant into cold soil as soon as workable to keep plants from bolting.