Re: Heating cables
it really would cost a fortune to do trace heating undersoil like that, the heat losses are just too great. you could wrap the plant in insulation and then trace heat around the stem. I heat my bubblewrapped poly tunnel (see photos in my gallery somewhere) with a 3kW fan heater controlled by a frost statand I'm going to have to hide the electric bill from the Mrs...
got to address a new htg. system for that this year, either solar or heat pump, feeding undersoil water pipes
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