Strawberries have to have frost / snow on them or they will not produce any flowers in the summer,therefore no fruit.i leave mine out all winter,they will start new growth as and when they are ready,i take the runners off in autumn pot them on,put in greenhouse to root,once thy have rooted i put them outside with the rest,always seems to work for me,had a good year with them last year,even though the slugs and snails had a good share of them too
