Trees, Shrubs and Conifers: Black Stuff all over leaves, 1 by UniQueTreasures

UniQueTreasures wrote:
We tried "washing" one of the leaves with some car wash mixture. Didn't do a bit of good and I really don't want to have to "wash" each individual leaf on EVERY plant. As you can see there are a whole lot of plants in the island.

Strangely enough, only the plants on the right sife of the island have this black stuff. Everything behind the island is fine and the plants on the left side are just fine too.