Plum Cobble is a 2″ sized river rock with shades of of tones of grey, red, purple, blue, etc. This rock works great for landscaping parking strips, dry river beds and general landscaping.
Best Results: For best results and to reduce weed growth, install rock around 4″-5″ deep over top of quality commercial grade weed barrier.
Recommended Depth Rule: The rule of thumb with rock is to install a rock at least twice the size of the rock not going any less than 2″ deep when using small rocks. With a rock that ranges in size from about 1″ – 2″, average the range at 1 1/2″ and the minimum recommended depth would be 3″ deep. Going less or basing your measurements on less depth will likely show the bare ground beneath the rock or running short. You are welcome to place rock deeper than the minimum recommended.