When is your average frost? Here in MA-US for example the equinox is around July 27th and so I would have around 8 weeks for veg before she flowers and then first frost is usually in Mid October so I have around 10-12 weeks for flowering time depending. What is your grow season length?
I think you're gonna have a hard time finishing that strain before the winter rains. I know in the UK they need early flowering strains because of the mold. Skunk isn't a short flowering strain. If I were you, I grow it in a pot, that way if it didn't finish in time outdoors, I could bring it inside.
Its worth a tryy, could i take it in for 12 hours and sun for anuva 12 to force flowering so i dont have to worry about it not being able to finish before the frost comes