decomposing mulch question
Earlier today when I was stirring up the mulch on my flower beds, trying to figure out where I'm going to sow various flower seeds this fall, I noticed something that looked like smoke was rising from any area I disturbed. I suppose it was a very fine dust of some sort, or maybe spores from some kind of fungus . . . ??
I'm wondering if whatever it is would keep seeds from germinating, or be detrimental to any seedlings trying to grow there. I usually scrape the mulch back to sow seeds. Last spring hardly any of the thousands of seed I sowed grew. Now I'm wondering if this could be the reason.
I've been getting this mulch from the city for years. Don't know exactly what's in it, but what's there now is over a year old. We've had very little rain this year, so it hasn't decomposed much.
Anyone want to guess what's going on . . . or whether it could affect what I plant there.