Imperial 615 · Lettuce
Planting Schedule
Add Imperial 615 to your garden to build a schedule and get reminders.
| Milestone | Date |
|---|---|
| Start Indoors | Mar 23rd |
| Last Frost | Apr 20th |
| Transplant / Direct Sow Outdoors | Apr 20th |
| Harvest Begins | Jun 29th |
| Harvest Ends | Oct 20th |
Crop Details
Transplant Conditions:
Wait until soil reaches 40°F
and nights stay above 32°F
before moving outdoors.
Harden off for 5 days first.
| Trait | Value |
|---|---|
| Days to Maturity | 70 |
| Sun Requirements | 🌤 Part Sun |
| Growth Habit | Rosette |
| Support Needed | None |
| Planting Depth | Surface |
| Germination Temp (°F) | 45 |
| Min Soil Temp (°F) | 40 |
| Min Night Temp (°F) | 32 |
| Harden Off (days) | 5 |
Expert Note: For crisp, durable heads, keep soil consistently moist and aim for cool weather—heat and irregular watering are what reduce crispness even when tip burn is resistant.