Pavel314 wrote:
On Dec 26, 8:34 pm, "DogDiesel" wrote:
I'm just wondering if it makes sense. Because I have 5 months of snow. And
I could seed in my house windows. Or my hydro units if I wanted to pay the
electric. And I don't want to heat it. I've got commercial greenhouses
near me that sell awesome starter plants.

If you have five months of snow, you'll need to heat it during the
winter. I built one for my wife, it's 12' x 14' and is stuck on the
south end of our house. We're just north of Baltimore, Maryland.
During the winter, it gets up to 80 degrees F during a sunny day but
would chill way down at night or on a cloudy day without a heater.

I ran a 220 line out there for heat. She keeps it at 50 degrees F
during the winter and I figured that costs us about $300 in extra
electricity each year. She enjoys gardening in the snow so much that
the extra expense is worth it.

You may want to consider a cold frame instead of a greenhouse. Our
cold frame is a box about 3' high and 14' long with clear plastic
doors on top. This lets the sun heat it up in the early spring for
starting seedlings to get a jump on the planting season.

Paul

Or consider a heated frame using heated soil cables next to your house.

--
Enjoy Life... Nad R (Garden in zone 5a Michigan)