Oh yeahh, I see what you mean. Yeah those should be pretty doable as alpha.
As for the fuz, yeah, no. I don't know how to do that without it killing a renderer. Lol I mean you could try some hair and just do it around the new growth bits (flowers), and make it not so thick, just enough to pickup some light. Otherwise I'd probably fake it for further shots with another mesh over the newgrowth bits, just a tiny bit larger, and then an alpha mask and transparency.
