SproutSmart
SproutSmart Intelligent Garden Sowing

Yellow Granex · Onion

Planting Schedule

Add Yellow Granex to your garden to build a schedule and get reminders.
MilestoneDate
Start IndoorsJan 12th
Last FrostMar 23rd
Transplant / Direct Sow OutdoorsMar 16th
Harvest BeginsJun 14th
Harvest EndsNov 12th

Crop Details

Transplant Conditions: Wait until soil reaches 40°F and nights stay above 35°F before moving outdoors. Harden off for 7 days first.
TraitValue
Days to Maturity90
Sun Requirements☀️ Full Sun
Growth HabitBulbing
Support NeededNone
Planting DepthNormal
Germination Temp (°F)70
Min Soil Temp (°F)40
Min Night Temp (°F)35
Harden Off (days)7
Expert Note: For short-day sweet onions, start transplants early and keep them growing steadily—avoid drought stress to prevent premature bolting and small bulbs.