Seashells safe to use in rock garden?
I have a small area, about 4 feet by 4 feet. I'd like to put a couple of small ornamental grasses there and to cover the soil with seashells, such as big clam shells and other smaller shells.
Do you think the seashells will cause any problems in the soil, such as leaching out too much salt. Should I put wood mulch down, then cover with shells?