I've got one of these but need to put it together. Is it worth growing outdoors in this thing, preferable to growing entirely outdoors being exposed to the elements. I'm in a colder climate (today 56F / 13C, windy & rainy) so I'm a bit concerned about putting the plants out in this weather but I'm guessing zipping them up in the greenhouse might be a good idea (although they then won't have any warmth from the house heating)? Also I think it'll reduce slugs and insects on the plants because the entire things zips up tight. Anyone experienced using this?