I have been cutting off the tops of lettuce plants for years they are almost always good to regrow leaves almost as full as the first ones. I do that once, then pull the roots, and then plant new seeds nearby for the second crop. Third crop just came inside in pots.
I’m excited to see what I can accomplish by doing just that!
I’m working on ideas for the ‘Gardening Short Cuts’ book I’m hopping to write some day. :)