I've done this successfully with fig and pomegranate plants for several years. I tried this with a tomato and a couple of pepper plants last winter, but they all died using basically the same procedures.I read an article earlier today that said you can overwinter pepper plants. Has anyone done this? I was planning on just saving seeds from my two favorite pepper plants but I'm gonna try this way also. Figured I have nothing to lose, still going to save seeds and the plant would just be tossed anyways
I bring the plants into my attached garage (which keeps them above freezing), keep them in the dark and water them once/month while they are dormant. This works for the figs/poms, but the tomato/peppers died. One difference is that I heavily pruned back the tomato/peppers before bringing them in per procedures I saw on the web. I'm not sure if the problem was insufficient watering or if they need light during the winter. I'll try again and water more frequently this winter. If they need sun (like in a sunroom), then I won't be able to succeed.
One warning- be careful if you bring them into your house proper. You will be bringing insects into the house.
Good luck.