XANAX (alprazolam) HAS a duration of action of up to 6 hours. If you want to know how long after you take it can it be DETECTED, that's different. Most benzodiazapines, when taken on a regular basis, can be detected in the urine from 24 hours to 72 hours.
The color of that mulch is a dark brown, browner than most brown mulches. I thought it was good mulch until I noticed how large the pieces were. They were similar to large chunks of wood more so than mulch.
Most naturally colored organic mulches range from pale to dark brown. Pine needles, straw and sawdust begin as pale or tan mulches that turn brown with age and moisture. The color of bark or nugget mulch may reflect colors of their origins, most often a pinkish tint to cedar or pine mulch. Composted wood mulch will be a much darker brown from the heat and compression of the composting process. Buckwheat hulls and cocoa shells are both naturally dark brown.