I've tried all sorts of mulches over the years for my perennial beds and the one I like best comes in bags at Lowes, labeled soil conditioner. It keeps down the weeds, decomposes slowly (unlike pine needles) doesn't rob the plants of nitrogen (like Midnight Black mulch), stays loose (unlike some mulches that harden on top and prevent water from penetrating) smells good and has a nice light consistency.

This is only the second year I've used it, and I'm wondering if anyone here can tell me what it is made of and what are the long term negatives and/or benefits.

Thanks for your help.