Black Jack · Lettuce
Planting Schedule
Add Black Jack to your garden to build a schedule and get reminders.
| Milestone | Date |
|---|---|
| Start Indoors | Direct Sow |
| Last Frost | May 4th |
| Transplant / Direct Sow Outdoors | Apr 27th |
| Harvest Begins | Jul 1st |
| Harvest Ends | Oct 5th |
Crop Details
Transplant Conditions:
Wait until soil reaches 40°F
and nights stay above 35°F
before moving outdoors.
Harden off for 6 days first.
| Trait | Value |
|---|---|
| Days to Maturity | 65 |
| Sun Requirements | Part Sun |
| Growth Habit | Rosette |
| Support Needed | None |
| Planting Depth | Surface |
| Germination Temp (°F) | 65 |
| Min Soil Temp (°F) | 40 |
| Min Night Temp (°F) | 35 |
| Harden Off (days) | 6 |
Expert Note: For large Romaine types like Black Jack, start indoors for early size but transplant close to last frost so plants get cool-season growth before heat triggers bitterness and bolting.