Keeping a greenhouse warm in the colder months can be tricky and expensive. That's why the latest viral hack has caught my eye: a DIY clay pot heater. It uses just a terracotta pot and some tealight candles to warm up a greenhouse – an inexpensive and convenient idea. My only concern is how effective it really is at warming a greenhouse sufficiently to support the plants growing inside.
The truth is there is no single way to heat a greenhouse. For something reliable and low-effort, a lot of gardeners use electric greenhouse heaters (like this one from Amazon), but the running cost can be expensive. Others use bubble wrap to insulate a greenhouse. Now, many gardeners are giving the clay pot heaters a go, placing tealight candles under an upside down pot to radiate heat.
