Although it’s possible to grow all year round in an unheated greenhouse, adding greenhouse heating makes a huge difference in the winter months. Plants grow much better with in a greenhouse with heating, and you can start growing much earlier in the season than you would be able to in an unheated greenhouse.
Harvst 4-season mini greenhouses can be fitted with heating to help you grow more, all year round:
Both heated seed trays and the heater cable are only compatible with the Harvst smart control system, and should not be connected to any other power source.
The control units in both our ‘Terrace’ Mini Heated Greenhouse (6×2 ft) and our ‘Yard’ Mini Heated Greenhouse (4×2 ft) can power up to 6 heated seed trays to germinate faster, or 3 heated seed trays and a 3m low voltage heater cable for general greenhouse warming.
Heated seed trays
Our 12v heated seed trays are designed for a damp, irrigated space, where they need to be able to drain off excess water.
They are standard deep seed tray size (38 x 24cm), with a heater pad set between two layers.
Soil heater cable
Harvst 12v soil heating cable / soil warming cable is suitable for laying under the soil, or in free air to warm up the interior of the mini greenhouse.
Supplied as a 3m length, it’s strong, waterproof and reliable.
The heater cable is self-regulating, which means it stays at a constant temperature regardless of the ambient temperature. On a colder day, it will use more power to stay warm, and on a warmer day, it will use less. The target temperature is approximately 50 degrees, which is suitable for deep burying or as a space heater. Ensure it doesn’t come into contact with roots or plants.