I am growing this plant from seed and have a half dozen plants that are about 8" long. They really should go outside lest they twine around every seedling near them in the greenhouse, but it does seem rather early - mind you, they are said to be hardy in zone 5 and although I have never thought of it, I imagine that may affect how early they can be set out. Has anyone in zone 7B or colder, like Vancouver, grown it and if so do they have any advice?