patandchickens
Deeply Rooted
You just run a small lightbulb or xmas tree light string (of trustworthy electrical safety) underneath a jellyroll pan or whatever like that. It requires fiddling to determine the right distance and amount of air circulation to get the soil temperatures you want (work it out with an unplanted flat, obviously, not real seedlings!). You just need to make sure that it is electrically safe if water spills.
Haven't done it myself; seen pix and knew someone who did it, though. Me, I own a 1 flat size heating mat, and just don't grow more than one flat's worth of bottom-heat-needing seeds at a time <g>
Pat
Haven't done it myself; seen pix and knew someone who did it, though. Me, I own a 1 flat size heating mat, and just don't grow more than one flat's worth of bottom-heat-needing seeds at a time <g>
Pat