[Baeocystin]

I know you know this, as you referenced the pads, but FYI for the interested: you can get electrically-heated seed mats that only burn 20-40 watts, and cover a standard size.

https://www.amazon.com/Jumpstart-MT10006-8-875x19-5-Inch-See...

I use them for both seed starting, and as a gentle, no-hot-spot heat source in my 3D filament storage/desiccant container. Even leaving them on 24/7 will only add a dollar or two to your monthly electricity bill.

[foxhop]

Yeah, the heating pads or seed starting is a great idea. I bought a bunch of 72 watt incandescent bulbs for when the seedlings sprout.

I've been using one at my desk to keep my body / hands warm. Beats heating the whole room when all that is cold is myself.

I'm in zone 6b and I'm just starting some of my cold hardy plants now. Its a little early but I can't help myself.