Save seeds from the plants that are slowest to bolt. When the flowers have changed to seed heads remove seeds and dry indoors. Head lettuce may require cross-cutting. 1
Seed viability is three years.
These estimates for how long Butterhead lettuce takes to sprout, grow and harvest are from real observations from real gardeners, right around the world.
Average 6 days | Min 1 days | Max 19 days (226)
Average 29 days | Min 6 days | Max 99 days (21)
Average 29 days | Min 23 days | Max 63 days (10)
Our when to plant Butterhead lettuce estimates are relative to your last frost date.
Butter leaf lettuce, Butter lettuce, Buttery lettuce, , Butterhead
1 :The New Seed-starters Handbook; Published 1988