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.
Mulch without dye. Most natural organic mulches will turn gray in about a year, depending on the amount of sunlight that hits them. However, if you want more color to accent the colors of your plants and flowers, buy custom-colored organic mulches (photos). They're processed with vegetable dyes in several colors.