Installing Landscape Fabric and Lava Rock Around Existing Plants

A homeowner removed fungus-prone mulch and wants to install weed fabric and lava rock without removing established plants.

Expert Advice: Skip the Fabric in Planted Beds

Don't use landscape fabric under rock in planted areas. Here's why:

• Organic mulch decomposition creates beneficial mycorrhizal fungi—mushrooms indicate healthy soil, not problems.
• Fabric is designed for walked-on gravel areas to prevent soil mixing, not planted beds.
• Installing fabric around existing plants is tedious, damages roots, and creates future maintenance headaches.

Better Approach by Plant Type

• Mediterranean/Drought-Tolerant Plants: Use light-colored gravel (not dull lava rock) to reflect light in winter.
• Acid-Loving Plants (Azaleas, Rhododendrons, Maples): Use organic mulch like pine bark to maintain acidic conditions.

Reference: Detailed mulching article on the expert's website.

Match mulch to plant needs, skip the fabric, and embrace the natural soil biology that supports healthy plants.