Oh, wow ... I don't even know where to start and I'll probably forget half the things that make this fic as brilliant as it is. This fic makes me all sorts of happy. I love Neville/Theodore (almost as much as Remus/Ron, so that's saying something). Theodore is indeed a very neutral and independent Slytherin, and I love the way you have characterised him here. The greenhouse and the plants, I love how you put in all the details about the plants. And the greenhouse sex, Theo sure knows what he wants, no? And Neville's slow "loss of his higher brain functions" *grins* I like how you portray Neville in this, especially the little bit of him that remains clumsy, unsure-of-himself Neville when he falls out of the hammock. And the ending is sad as well as hopeful. I like endings like that.
Thank you, my dear mystery author, this really is a most wonderful gift!