My lettuce is one month old and I cut the entire thing off about 1/2 inch high to see if it will grow more leaves. I read leave 1 inch for regular lettuce, so for the minature AG lettuce, I left about 1/2 inch. Time will tell.
Read it here:
"For cut-and-come-again, cut the entire plant parallel to the ground and approximately 1 inch from the soil. The center will regenerate first, and the plant will then begin to form new leaves that grow to edible size. Clean your tools before cutting each plant."
elainev , the pros and cons of different ways to harvest lettuce have been discussed countless times here. You can find some of them by doing a search.
Personally, I find my romaine grows faster than we can eat it when I harvest the large outer leaves only. Several days later the lettuce has filled out to the point you can't tell it has ever been harvested.
We all have our favorite methods -- and they all work -- some faster than others.
elainev , the pros and cons of different ways to harvest lettuce have been discussed countless times here.
Since everything has been discussed already, sorta defeats the purpose of continuing a discussion forum, doesn't it? I'm so sorry I mentioned cutting off my lettuce. I'll try not to duplicate anything in the future.
I tried your version of cut and come again on the Chinese cabbages in my hydroponic totes. The one on the left was cut May 17, and the one on the right last night. You can already see new growth on the one I cut last night. And the one I cut earlier is coming back strong.
This is actually a better method of spacing out my harvests. By the time I cut the last one, the first one will be ready to eat.