Spinach, kale, cabbage, bok choy, Chinese cabbage, and most root crops. Leeks, beets, carrots, turnips, parsnips, radishes, and rutabagas and some varieties of onion can be grown through Winter in a greenhouse and you’ll get a much earlier crop than if you’d waited till spring.Click to see full answer. Furthermore, what do you grow in a greenhouse?Growing tender crops such as aubergines, cucumbers, peppers and chillies and tomatoes through the summer months. Trying more exotic, heat-loving plants such as okra, melons and sweet potatoes, Making use of the autumn sun to raise late salad crops, French beans and even calabrese.Beside above, when can I put plants in an unheated greenhouse? An unheated greenhouse can be used to grow greens during winter, start warm season annuals, propagate landscape perennials, and shelter frost tender plants through the winter chill. Besides greens like spinach and lettuce, you can grow cold tolerant veggies such as cabbage and broccoli in your unheated greenhouse. In this manner, can you grow plants in a greenhouse during winter? Growing winter veggies for greenhouses is possible because most cool-season plants can tolerate temperatures near freezing, as long as their soil isn’t muddy. If you’re planning on winter vegetable growing when building your greenhouse, add a passive solar collector such as a wall of black-painted water jugs.Can you grow vegetables in a greenhouse year round?Yet here are green vegetables, kale and lettuce, growing in near-90 degree temperatures. They’re thriving in a specialized “deep winter” greenhouse, letting farmers Tom Prieve and Sue Wika grow fresh vegetables year round — without a crushing electric bill. Their plants survive largely on natural winter light.