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Saturday, April 03, 2010

DIY Soil Heating - Don't try this at home


This is a 15 watt rope light 240volt sitting on a slab of Kingspan. The sides are Kingspan the front a double glazed window the top perspex. The Kingspan has a foil skin that reflects the light. This is my plant incubator to start my tomatoes, melons and peppers. Its 6 foot long by 2.5 foot wide and tall. The rope light is covered with compost. The pots with the plants and seeds will sit on top. I may put some broken paving slabs on top then some more compost to act as a heat sink. 

I have a little digital thermometer with a remote wired sensor embeded in the compost. the compost whch had been outside started off at 11degrees C , it raised to 13 over the afternoon. I have plugged the soil heater in and it has reached 14.4. This I hope will rise 25 to 30.

Postscript. Up to 38 by next morning. Some fine tuning needed

So it works lol

Will try to control soil temperature with a timer. The best way a temperature thermostat.
Last year I bought melon plants from the Duke of Westminster's garden centre but they sulked due to low soil temperature. Should stop that this year 

Thank you Yvonne for the rope light present. So far it has lit up my protest sign " 2000 speeders a day" I had pointing at the road. Now it is buried in the incubator. If I pull back the compost it will glow blue at night. Tomatoes not Ganga, Howie. 

Also looking at soil heating with solar. Watch this space.




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