Strawberry plants

No, they would die if the temperature falls below freezing. They need to be brought in for the winter.

When you say you haven't had much success, What do you mean? Didn't they have any strawberries? the trouble with them is they don't like wet weather and tend to go mouldy at ground level. I notice that the pick-your-own growers round here are now growing in poly-tunnels with the containers raised up to about waist height. They don't die in winter outside, just the leaves above ground disappear.But they obviously get a better yield with some protection and they avoid the slug damage by raising them up.