Hooo boy, I stumbled across your forum thread today. I'm a bonafide coleus fan and have taken cuttings and overwintered them for 3 years now.
I'm on the hunt to re-find Velvet Stockings again. These photos are my faves from 2021, a number of which I'm still overwintering to use in 2024, starting with making cuttings this past September and potting them up and putting them in my little greenhouse as I do extensive prep to bring plants indoors for the winter that I generally finished up in December or January.
This January I closed the greenhouse for a few weeks as we went into negative temps and moved my rosemary bush, fig trees and plants into the garage with the overwintering dahlias. Coleus young plants all came indoors in November (and my slow process of prepping plants has cut waaaay back on any fungus gnat problems.)
It's warming back up this week in SE Michigan and back out everything goes, back to the light and 40 degrees or so in our bubblewrapped greenhouse that should keep things ok for February as the light returns, barring any more sub-zeros weeks showing up.
Back to coleus, I no longer overwinter larger plants. Everything I want to overwinter is from cuttings, and then I find some delights at a local farm nursery in April. Looking forward to seeing your 2024 coleus choices.