Posted: 02/08/2014 at 12:00
No, Mike, I don't think the soil top dressing is the cause of your fir trees' distress. Unless the trees are small and recently ...over past 4 years or so....planted.
All conifers brown from the inside, that's not a problem. It's when the green outer leaves go brown thats an issue.
How big are your trees? What sort are they? Browning from one side only? Perhaps an animal, or cold draughts could be the reason.
This past winter and spring have revealed lots of comifer problems, down here in the south west anyway, probably because of the excessive wet comditions and subsequent diseases.
Perhaps a photo?