SproutSmart
SproutSmart Intelligent Garden Sowing

Blue Hubbard · Winter Squash

Zone 4b Save Garden

Planting Schedule

Add Blue Hubbard to your garden to build a schedule and get reminders.
MilestoneDate
Start IndoorsDirect Sow
Last FrostMay 13th
Transplant / Direct Sow OutdoorsMay 13th
Harvest BeginsAug 21st
Harvest EndsSep 27th

Crop Details

Transplant Conditions: Wait until soil reaches 65°F and nights stay above 55°F before moving outdoors. Harden off for 10 days first.
Direct sow preferred — this crop has sensitive roots and does not transplant well. If starting indoors, use biodegradable pots and disturb roots as little as possible when moving outdoors.
TraitValue
Days to Maturity100
Sun RequirementsFull Sun
Growth HabitVine
Support NeededTrellis
Planting DepthNormal
Germination Temp (°F)65
Min Soil Temp (°F)65
Min Night Temp (°F)55
Harden Off (days)10
Expert Note: Direct-sow or transplant only after consistently warm weather (soil warm) and avoid root disturbance to prevent transplant shock for this cucurbit.