Great Lakes 659 · Lettuce
Planting Schedule
Add Great Lakes 659 to your garden to build a schedule and get reminders.
| Milestone | Date |
|---|---|
| Start Indoors | Apr 28th |
| Last Frost | May 19th |
| Transplant / Direct Sow Outdoors | May 19th |
| Harvest Begins | Jul 28th |
| Harvest Ends | Sep 21st |
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 | Full Sun |
| Growth Habit | Rosette |
| Support Needed | None |
| Planting Depth | Surface |
| Germination Temp (°F) | 55 |
| Min Soil Temp (°F) | 40 |
| Min Night Temp (°F) | 32 |
| Harden Off (days) | 5 |
Expert Note: For crispheads, keep soil evenly moist and transplant into cool weather—heat speeds bitterness and prevents tight head formation.