What does a typical, perfectly healthy vaccinium corymbosum (highbush blueberry) leaf look like?
- Colour (darkness of green, redness)
- Waxiness
- Veins
I'm guessing that soil ph, nutrients, and other factors play a part. Vacciniums seem to have very specific needs, and as far as I know, assessing the leaves is one of the best ways to determine plant health.