I planted 6 lettuce plants and this morning 3 of them are completely nipped. Do you know if they will grow back as only a little bit of the leaves are left. Also how do I protect the rest? I also have cabbage and cauliflower in the same bed and they left most of them alone.
There are many reasons why this may be happening. Rabbits, squirrels, mice/voles, cut worms, snails/slugs, etc. You will have to observe to see if there are foot marks in the soil or by going out at night with a flash light and looking under the leaves. As suggested by stormy, if you can cover these with a row cloth, the likelihood of damage from rabbits, squirrels, mice, cut worms, etc. goes away. Snails/Slugs will still be an issue. Good luck!