Bio Green Electric Soil Warming Heating Cable - 4.3m 25W Bio Green Electric Soil Warming Heating Cable - 4.3m 25W Bio Green Electric Soil Warming Heating Cable - 4.3m (14ft) 25W A quality electric soil warming cable from Bio Green is an ideal way to propagate seeds and cuttings in a greenhouse. 4.3m flexible silicone cable. FREE POSTAGE £39.45 Quantity: at £39.45 each Add To Basket 0 in your basket View Basket Checkout This 4.3m (14ft) electric soil warming cable from the quality German garden products supplier Bio Green. Ideal for making heated propagation beds for the greenhouse creating the optimum conditions for seed growth and germination. Flexible silicone cable is water resistant. Warms the soil by 8°C to 12°C. 25W. Can be used with a Thermostat - sold separately. Comes with a 2 year manufacturer's guarantee. The soil warming cable is fitted with a UK plug.