Argh! That's not what I'm talking about, m3henry. Yes, trees have a cycle, but that isn't based on callender seasons, it's just growth, normal, and then decay. When I was speaking about seasonal changes, I was talking about being able to specify when trees go through the various stages of that cycle. Ofcourse they'll have a specific lifetime, and then they'll go through the decay stages, but during summer/spring they should look normal, autumn/winter, start to brown up a bit (Depending on if it's an evergreen or not), and if the snowline creeps up on it, get snowy sprites (Which already happens, so we won't worry about that part).
oh right, mine just randomly cycle. from green to brown to bare to green, just not sycronysed with the year. my bad