Starting Dahlias

This is my window at the moment.

 

Some varieties are stronger than others.

 

Would it be possible to put them outside for a couple of hours a day then bring them back in been getting a lot of sunshine this last couple of weeks.

I would of thought they would need hardening of before planting outside so would that be a bad idea.

 

You could try, but be careful, its been sunny but really quite cold recently, they could easily get chilled.
You really need a protected area outside, similar to a cold frame, to use during daylight hours at the moment.

 

I have a five tied cold frame that I never use might give it a try.