SproutSmart
SproutSmart Intelligent Garden Sowing

Waltham 29 · Broccoli

Zone 1a Save Garden

Planting Schedule

Add Waltham 29 to your garden to build a schedule and get reminders.
MilestoneDate
Start IndoorsMay 18th
Last FrostJun 15th
Transplant / Direct Sow OutdoorsJun 15th
Harvest BeginsAug 29th
Harvest EndsJul 15th

Crop Details

Transplant Conditions: Wait until soil reaches 40°F and nights stay above 32°F before moving outdoors. Harden off for 6 days first.
TraitValue
Days to Maturity75
Sun RequirementsFull Sun
Growth HabitRosette
Support NeededNone
Planting DepthNormal
Germination Temp (°F)45
Min Soil Temp (°F)40
Min Night Temp (°F)32
Harden Off (days)6
Expert Note: For best Waltham 29 head size, transplant into cool, moist soil and keep plants evenly watered so they don’t bolt in heat.