>> Works fine for lettuce!
Thanks! When I read that lettuce is mostly-self-pollinating, I got excited. Time to sow and save some seeds!
>> I cut them into squares with a knife,
Just last Sunday I had to move some sedum and creeping thyme I had been given a year or two ago. It had multiplied enough that I split each patch into two pots and two tiny new raised beds, and had enough left for a planter plus some scraps here and there.
I wished I had thought to bring a serrated knife with me!