Well it's been years, but here's an update on the lemon tree I started from seeds that I got from a grocery store lemon.
Yeah, look at that. I've actually had to prune it down several times so as that it would fit in my sisters window seat. I took the two strongest saplings and twined the smaller one around the larger and it's looking pretty cool.
They're beginning to fuse together and the whole thing is really doing well. I'm hoping for fruit this winter! Further updates as events warrant.