is it possible to grow outside in with a good home made shelter but cold weather

title says it all, i wanna grow outside weather can be unpredictable, but i will have glass top and surrounded sides, so it will b enclosed, wud this work? temperatures drop to about 9 degrees at night

9 huh? I once read a thread where a dude was doing a dwc outside in a shed at 32 f or so but 9.....I dunno, at least it will turn out purple.

If you can keep it warmer then 9° in the shelter (more like above 30°) then yeah it could maybe work lol

You gotta keep the water from freezing

I would say if there is an obstruction in the light {i.e tree} then no, but if the solarium {greenhouse} is in direct sunlight for most of the day and you can be certain that you can control the temp and humidity inside then I can't see why not.

imo not going to be worth it...
your going to have to do everything but the light...
heater,dehuey and fans...

might as well just go inside...

9 degrees F or Celcius?

It is, with heat, but not worth it , check this out.
https://www.rollitup.org/outdoor-growing/434517-colorado-medical-greenhouse-6.html

Yes. But I would use a oil heater or 2. Keep temps above 50. And use autos. But yes your taking a chance