There are other ways to keep your greenhouse warm in the cold winter months or during a frost that are worth trying if you have one. GroWell recommends using bubble wrap, "All you need is bubble wrap.

If you're on a budget, consider using bubble wrap as an insulator. It's cheap, easy to install, and surprisingly effective at keeping your greenhouse warm. Just line the inside walls of your ...

You can make your own mini greenhouse by building a wooden frame with shelves and lining it with bubble wrap. This will keep the plants warm and dry; ventilate them each morning to stop moisture ...