I use several heat mats. One is a real cheapie that is about 20 watts that I use under a 10 x 20 tray for starting seeds. I've had it about 10 years, and it cost about $16 when I bought it. No thermostat, so I regulate the temperature by having the clear lid partially open.
I have two others that are the heavy rubber type that I use in the garage for when the plants are too big for my indoor shelf. About 60 watts each with plugin thermostat. Those cost around $40 - $50, but they are much better quality.
Some new catalogs show them going north of $100 each!!! Ouch!
Last edited by Greatgardens; December 26, 2018 at 11:28 AM.
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