Subbed after watching the cold frame videos. Hope it helped you grow your winter veggies successfully. I am planning to build a hoop house and maybe have winter veggies growing under row covers or cold frames within the hoop house. For most heirloom varieties of plants, just save and store seeds from your garden, especially the ones from the very first harvest of the season. All the best for 2023! Hope you already started your onion seeds! Good luck!