SproutSmart
SproutSmart Intelligent Garden Sowing

Gladius · Brussels Sprout

Zone 4b Save Garden

Planting Schedule

Add Gladius to your garden to build a schedule and get reminders.
MilestoneDate
Start IndoorsApr 15th
Last FrostMay 13th
Transplant / Direct Sow OutdoorsMay 13th
Harvest BeginsAug 11th
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 6 days first.
TraitValue
Days to Maturity90
Sun RequirementsFull Sun
Growth HabitUpright
Support NeededNone
Planting DepthNormal
Germination Temp (°F)45
Min Soil Temp (°F)45
Min Night Temp (°F)35
Harden Off (days)6
Expert Note: For the tightest sprouts, keep plants evenly watered and avoid prolonged heat—brussels sprout flavor and sprout formation improve as temperatures cool.