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.
They have used colored mulch to determine if other plants will try to outgrow each other, or put more energy in their shoot. They found certain colors of reflected light can change the flavor of some fruits and edible roots (such as turnips and carrots).