One of the biggest concerns that many gardeners face is how to keep their plants warm and cozy in winter without having to spend a fortune on heating bills. Luckily, there is a cost-effective and eco-friendly method to achieve this–by using stored solar power as thermal mass within your greenhouse. Here are some simple steps on how to heat your greenhouse for free in winter:
Install large black water butts in your greenhouse and fill them up with water.
Place the water butts in a sunny spot within the greenhouse, preferably near the plants that need the most warmth.
The black color of the water butts attract and absorb maximum heat from the sun, which is then stored as thermal mass within the water.
The water butts then release the stored heat during the night, keeping the greenhouse warm and cozy for the plants even when the outside temperature drops.
Another way to increase the efficiency of this method is to line the north wall of your greenhouse with rocks or bricks which also capture heat from the sun during the day and release it at night.
By following these simple steps, you can maintain a warm temperature in your greenhouse without the use of electricity or gas, which ultimately reduces your carbon footprint and saves you money on utility bills. So, why not give this method a try? Your plants and wallet will thank you!