The Q&A Archives: Groundcover Between Flagstone Rocks On Walkway

Question: I have installed a flagstone walkway in my side yard and I don't want the clayish soil inbetween washing away. Could you please recommend an appropriate ground cover that would hold the soil (clay) and look attractive. It would have to be very low growing so as not to trip anyone. It is on the west side of my house so it does get a good amount of afternoon sun.

Answer: Arenaria montana (sandwort) forms dense mats that are mosslike. It is used as a lawn substitute or between stepping stones, growing 2-4 inches high. It takes full sun and regular water. Scotch heather (Calluna vulgaris) has dozens of varieties, some of which are only a few inches tall, such as 'Dainty Bess' or 'Mrs. Ronald Gray.' Check with your local garden center for varieties. Creeping thyme and wooly thyme are other possibilities.

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