It s available in a wide variety of sizes colors textures and shapes from porous lightweight red or black lava rock to pretty smooth quartz gravel mulch in purple or pink.
River rock raised garden beds.
The previous owner put down what looks to be inch river rock in all of the landscape beds around the house.
River rocks of all shapes and sizes add a hard element to balance the soft features of flower beds.
The stone goes down at least 1 2 inches.
Crushed rock or pea gravel work well at the bottom of a raised bed to improve drainage particularly in beds more than 18 inches tall or where the bed is in an area of the yard with poor drainage.
River rocks get tumbled in water so they have smooth and.
I know the stone is expensive and it seems to be effective as a weed block but it makes planting replanting troublesome and feeding difficult.