Autumn approaching, going to make a beautiful red.

You're right -- that's exactly what it looks like, except that I wouldn't expect the leaves to begin turning until October. Maybe it's entering dormancy early as a response to stress?

Standard operating procedure, although they look like they might need a little nitrogen. Not sure if it's the lighting or what, but the leaves could be a little darker green. Maybe the fertilizer will kick in and darken then up a bit. Just my .02.

That's a good point, Ed -- the leaves are definitely a bit pale. All of my blueberries receive a light dose of MirAcid at every watering, though, so it really shouldn't be short on available nitrogen. Instead, I suspect that the pale foliage is a further symptom of whatever's prompting the color change. At the rate the leaves are turning and dropping, it won't have any leaves left in a week or two. By comparison, none of my other blueberries show symptoms that are even remotely similar -- they're all continuing to push out new growth like they should be. This guy, on the other hand, is just shutting down.

An aside for Ed -- Since it's lighter on N than most other CRFs, I've been meaning to ask you how much Shake'n Feed you incorporate per gallon for your blueberries. Also, do you apply it more than once in the growing season? I'm currently trying it out on two small rabbiteyes, and so far they're doing very well. Since I potted them up late in the season, I went with a light dose, but I'm probably going to try it out on some plants next year, as well.