I'd pot them up and keep in a sunny window for a while. Then plant them in the garden in early June.

Thanks. I will be gone for a few days, but they should be okay. Maybe I can put some baggy partial over them?

My potted dahlia wintered in my cool dark basement, I watered it once a month. 2 weeks back I left the pot outside in the sun, still no sign on life, any hope? Thanks