Heating your Greenhouse
The best thing about heating a greenhouse or glasshouse is that you don’t need to do very much to make a big difference! A couple of degrees is all it takes to enable you to grow a much wider range of plants and start those seedlings earlier in the season. There are two main points to consider.
Really you need to think about how much you want to invest in heating. Specialised Kerosene heaters may be a little over the top for some, where cheaper heat pads may just do the trick. A couple of other alternatives are big concrete pavers. These work by soaking up the suns energy during the day and letting the warmth out at night. A big black barrel of water will also do the same trick… as well as keep the water warm for your plants. We also have nifty little gadgets called a Greenhouse Buddy which measure the temperature and humidity in your greenhouse over any set period.
This is about retaining the heat in your greenhouse while the sun is shining and holding onto the warmth when the sun has gone. All our greenhouses have twin-wall glazing which you’ll find insulates really well. If you have glass you’ll need to be a little more creative. Either way you just need to remember to keep the doors and windows closed after about 3pm in winter to keep that warmth trapped inside as long as possible