3/8″ Pea gravel is perfect for park strips, zen gardens, small gravel pathways and as a general landscaping rock.
For best results and to reduce weed growth, install rock around 2″ – 3″ deep over top of quality commercial grade weed barrier.
The rule of thumb with Squeegy rock is to install a rock atleast twice the size of the rock not going any less than 2″ deep when using small rocks. With a 3/16″ rock, the minimum recommended depth would be 2″ deep. Going less will likely show the bare ground beneath the rock. You are welcome to place rock deeper than the minimum recommended.