Never mind, bumping this down

I suppose it could work, but I wouldn't be very optimistic about it. I know that normally you'd have to plant them in late July/early August at the latest if you hope to have some in the following Winter. The tent would definitely help them stay warmer, but I think that without a good initial growth spurt they'd still probably not catch up due to the lack of sunlight.

Granted, I really don't know what I'm talking about here. Did you find someone somewhere else who could give yuo a good answer?

Yes, I called Seattle Tilth gardening hotline. So convenient and helpful! You get to talk to a real person who is really knowledgeable.