This is my first winter with this greenhouse. I bought it to replace my much smaller one, and I have my Citrus Trees in it, and they are now blooming even with the cold temps outside. It stays warm enough for my tender plants, I have been picking tomatoes, carrots & potatoes and just planted more seeds to keep my veggies going without stop. Fresh homegrown veggies are so much better than store bought! Great greenhouse for it's price, I recommend it to any avid Greenthumber!!