SproutSmart
SproutSmart Intelligent Garden Sowing

Cardinale · Lettuce

Zone 9a Save Garden

Planting Schedule

Add Cardinale to your garden to build a schedule and get reminders.
MilestoneDate
Start IndoorsDirect Sow
Last FrostMar 6th
Transplant / Direct Sow OutdoorsMar 6th
Harvest BeginsMay 10th
Harvest EndsNov 26th

Crop Details

Transplant Conditions: Wait until soil reaches 40°F and nights stay above 28°F before moving outdoors. Harden off for 5 days first.
TraitValue
Days to Maturity65
Sun RequirementsPart Sun
Growth HabitRosette
Support NeededNone
Planting DepthNormal
Germination Temp (°F)70
Min Soil Temp (°F)40
Min Night Temp (°F)28
Harden Off (days)5
Expert Note: For Batavian/romaine-type lettuces, prioritize cool weather and aim to transplant only when nights stay comfortably above freezing to prevent slow growth and tipburn.