I have this unknown medium/large sized bush/shrub outside next to my driveway that seems to have these white spots/crystals all over them. From what I can tell, it seems to be damaging it and perhaps stunting its growth. I would say its about ~7 years old (when this home was built).
The best way I can describe the look and perhaps even feel of these spots would be like if you sprinkled fine salt on the leaves. The issue seems to be spreading from when I first noticed it....I'd say almost every leaf now has this infestation.
Oh, I ran my fingers under some water and it appears that I can remove most of it off a lead with relative ease by rubbing and/or slight scraping with my finger nail. (second picture)
Here are some pictures...hope they help. Also, thanks in advance!