One of the main reasons gardeners choose to use greenhouses is apparent: they can help protect your plants from the cold outside. Because of this, a greenhouse can make it possible to keep a garden for longer than the standard growing season or even potentially the entire year.
But does this mean greenhouses stop frost? Or is there a possibility that frost can still harm your plants, even when they’re sheltered by a greenhouse?
Keep on reading, and we’ll give you all the information you need on greenhouses and their risk for frost.
Quick Answer: Do Greenhouses Stop Frost?
The answer to this question isn’t a clear yes or no. Risk for frost is greatly reduced in greenhouses, but it isn’t completely eliminated.
Depending on how cold winters get where you live, and whether or not you heat your greenhouse, frost can still potentially occur in especially frigid temperatures.
Tricks You Can Uses to Keep Your Greenhouse Frost-Free in the Winter
Since frost is still a possibility in your greenhouse, you might be wondering what you can do to completely eliminate that possibility. That’s all going to come down to how well you heat your greenhouse.
Frost occurs when cool temperatures and moisture combine. By keeping your greenhouse above freezing temperatures, you will prevent frost from damaging your garden.
Plenty of gardeners have devised clever strategies for keeping a greenhouse warm even during the winter.
One smart strategy is using some water and rain barrels. Once they’re filled with water, you keep them in your greenhouse, and they’ll absorb heat from the sunlight over the course of the day. Then, at night, they release the heat gradually back into your greenhouse.
Insulating your greenhouse is another low-cost strategy you can do. You can seal up cracks in the walls or around windows and doors using tape. Alternatively, you can line the walls with bubble wrap.
If you find your greenhouse isn’t warm enough still, you may need to consider adding an actual heating system. With a heating system in place, you’re guaranteed to be kept free of frost all winter long.
Although frost can still occur in greenhouses in extreme circumstances, there are measures you can take to prevent it entirely. In a nutshell, all you’ll need to do is ensure your greenhouse is sufficiently heated.
Using rainwater barrels and insulation are two great and affordable steps you can take towards heating your greenhouse. However, an actual heating system will beat any other heating trick out there, and you may need to install one if other methods aren’t enough.
The design of your greenhouse matters, too, when it comes to the cold. If you’d like to see some greenhouses especially good for a cold environment, read our list of the best greenhouses for Michigan.