Its pm - it washed off with wait for it...... WATER. Plant is perfectly fine. Hard to believe but true.. I'm gathering pics of this plant for a future post in my grow journal.
I'm getting ready to tear down the space and have too many pots with just soil in the room. Those pots are causing the PM.
That and PM this time of year hear were we live is everywhere.
Sourthern Ag - Garden Friendly Fungicide is my organic solution. It's been applied after this pic and after the water rinse. Plant is back to looking normal.