Soil Warming Cable | 3 - 24m | Optional Thermostat
A soil warming cable is the ideal way to propagate seeds and cuttings on a greenhouse bench or in a cold frame. The soil in the greenhouse takes time to warm up naturally; with a soil warming cable you are able to plant earlier and raise better specimens.
A simple frame can be constructed from wood to form the propagating area required, which is then lined with polythene. The cable is then laid onto a 5cm bed of sharp sand (horticulural) and covered with a further 5cm of sand.
Higher temperatures can be achieved by laying the cable runs as close together as 5cm. In this case a thermostat should be used to precisely control the soil temperature meeting the differing germination requirements of various varieties of seeds.