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.
Common mulch items are pine straw, wheat straw, lawn clippings, newspaper mulch, and chopped up leaves. It's easy to make my own mulch if you have the materials available. It is especially helpful to organic matter in the soil when applied in the fall.