Q.Leaf Problem On My Autumn Sedum
All of the leaves on my sedum have developed brownish spots, and some have a black film that wipes off. The stems are strong and are not effected. The plant seems to be growing fine and is not dropping leaves. I see no insects.

GKH_Susan
Certified GKH Gardening Expert
Certified GKH Gardening Expert
Answered on July 8, 2024
The small, white things could be aphids, which produce honeydew, a sweet, sticky substance that causes sooty mold. Here is more:
https://www.gardeningknowhow.com/plant-problems/pests/insects/homemade-aphid-control.htm
https://www.gardeningknowhow.com/plant-problems/disease/how-to-get-rid-of-sooty-mold.htm
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