That’s a no go, but for a good reason! Your seedlings have to go through a process called “hardening off.” That’s when young plants get used to outdoor conditions. Move them to an outdoor, sheltered place, out of the wind and direct hot sun, for a week before transplanting them to their final home. This hardening off process toughens the plant’s cell structure and reduces transplant shock and scalding. If it’s getting frosty or even under 50°F at night, bring them inside and take them back out again in the morning.