[Arkansas Tider]

My greenhouse is 8X16 and is nothing but heat mats, once the plants sprout, I move them to a grow house. I maintain temps in the greenhouse at about 80 degrees average, I can sprout tomatoes in five days, squash in four. My grow house is size dependent based on what space I need, it is put up and taken down each year.

[Eric in the Ozarks]

We can do that via our beach house on Lake of the Ozarks. This building is into its 3rd year as our seed starter place.
Big SW windows, thermal floor and a good working plan that we’ve tested in past years.

BTW;
We’re still piking Roma tomatoes and Poblano peppers. The little guys—cherry tomatoes, are done.

[Tilted Irish Kilt]

Arkansas Tider :" My greenhouse is 8X16 and is nothing but heat mats, once the plants sprout, I move them to a grow house."
" . My grow house is size dependent based on what space I need, it is put up and taken down each year."

Good show ! You have a good system
I worked in a commercial greenhouse that had a sprout house of 25 X 60
and has 4 1/2 acres under glass (or more accurately , plastic sheeting)and six separate units as a grow houses. Good on ya ! (as the Aussies say)