Bonsai Jack® Black Lava Rock: A jet black, porous stone soil additive by Bonsai Jack®! Just mix into any soil to immediately add drainage. You can also use this as a dark top dressing. Let your creativity run wild! These pebbles have been screened to the uniform size of 0.25".
SHIPPING NOTICE: Bonsai Jack® products ship separately from plants - does not count towards Free Shipping minimum. Overnight shipping not available.
We recommend a 0.5" depth of top dressing to keep dirt from showing through or being exposed during watering.