I started some herbs about a month ago indoors, they are all roughly about 2 inches tall now. I've heard of people hardening off their seedlings before planting them outdoors when its time. How do you do that? By setting them outside each day and bringing them in at night until its warm enough at night to leave them outside at night as well and then planting them?
I looked for threads on this and didn't find any.
ETA: I'm also growing tomatoes from seeds and they are probably like 3 inches tall already.