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Retail bottom heat is expensive – I saw one “kit” at a local garden center that was big enough for 2 flats and was $79—wow!
You can buy a lot of tomato plants for eighty bucks! A low-cost alternative had to be possible for a dedicated scrounger like myself.
this could even be hooked up to a solar panel that runs off the grid. Perfect for starting seeds or making a smaller one for your pets in a SHTF situation. Heck, I would even sleep on it if i was cold.
click here to get the full instructions
