I overwinter my lemon grass in my family room, which used to be an attached garage. I don't heat it specifically, just whatever heat comes from the house. It never freezes, but can be as cold as 38/39 degrees out there at times, and probably averages in the upper 40's for the winter. It does have very good light, as I took off the old garage door and put in all-glass French doors and sidelites, and it faces due south. Does fine out there, and I run it on the dry side.

Thank you. I'm surprised-- and pleased-- to hear that it will take such cool temperatures. From some of the reading I've been doing, lemon grass seemed to require 50's and above. It's good to know that is not true.

I, too, over winter mine in the living room. It is not the prettiest houseplant, though.

My Lemongrass just stayed outdoors during winter, but I live in the Bay Area so we don't have frost here. Our lowest is just around 37/39 degrees. Although It seems to wilt like my other plants during winter time, but by springtime its green and robust again. I just have them in pots, but this year I planted one on the ground. The one planted on the ground grew so fast and way bigger that its brothers in the pots. :)