If you have questions about well information, please contact the Well Management Section at 651-201-4600 or 1-800-383-9808, or health.minnesotawellindex@state.mn.us. Due to security concerns, wells supplying public water systems are not displayed in MWI. If you need access to this information, please contact:
The leaves become bitter and the plants begin to bolt as the stem elongates into a tall bloom stalk. Leaf lettuce varieties take about 40 days from seeding to harvest while head types may take 70 days. This is another reason the head types are more of a challenge. To get more from your garden space, consider interplanting your lettuce with slower maturing crops.
3. Plant the lettuce seeds. Place one or two seeds in the center of each section of the seed tray, and gently cover them with a thin layer of the seed starting mix. 1  Iceberg lettuce seeds should be sown approximately four to six weeks before the last day of frost in your area.