I'm thinking of sowing some hardy annual this month. If I leave them in the greenhouse, bog standard un-heated, will they still survive the winter.
I live in the north east of England, it can get pretty cold where I live, as I am on the edge of the city and am semi rural.
Any tips? Insulate the greenhouse with bubble wrap. Individual plastic covers for the trays. There's not really a lot of room in the house and come winter the central heating is on.