Cinder, also known as “lava rock,” is used for railroad ballast. You can use it for running tracks, baseball infields, driveways, pathways, flower beds, hydroponic and aquaponics. Cinder is very porous and weighs less than half that of other landscape materials. It has excellent drainage properties and is erosion resistance. Cinder provides optimum drainage to a bed, making it suitable for low-lying areas that collect water or for plants that prefer drier growing conditions. It is ideal in areas where you want minimal maintenance and plans to grow native or low-maintenance perennial shrubs, trees, and plants.
The rocks are best for areas where the ground is rarely disturbed, and the stones can remain a permanent part of the landscape. Cinder ballast is a volcanic rock that gets its appearance from the simultaneous rapid cooling and depressurization process after being ejected out of a volcano. Cinder ballast has small cysts, which is what causes it to be so light in weight. These vesicles help to retain nutrients and moisture when used as a soil amendment and will also help with drainage as it creates excellent pore space in the soil. It also does not attract fungi, nematodes, or insects.
Cinder Sand used as an infield and warning track component for baseball fields. Cinder as decorative purposes in landscaping. Cinder rocks are lava cinders screened to two sizes: Large (3⁄4″ – 11⁄2″) and Small (1⁄4″ – 1⁄2″). Cinder rock seems to be the hands-down favorite for replacing an old patch of grass with decorative ground cover.