Keep Lily of the Valley Growing
We had some lily-of-the-valley, but they disappeared when the snow-on-the-mountain took over. Is there any way to get and keep lilies-of-the-valley growing?
Start by controlling the snow-on-the-mountain or find a new spot for the lily-of-the-valley. Though both are aggressive plants it seems the wrong one won in your landscape. Kill the unwanted snow-on-the-mountain if needed with several applications of Roundup, Finale or other total vegetation killer. Be sure to read and follow directions.
After a few attempts you may decide to find a new home for the lily-of-the-valley. Then add several inches of compost, aged manure or peat moss to the top 6 to 8 inches of soil. This will improve drainage and reduce the risk of root and stem rot that may have weakened your lilies and allowed the snow-on-the-mountain to take over. Purchase new plants or find a gardener willing to share. And any gardener with lily-of-the-valley plants is usually more than happy to share. Spring is the best time to dig, divide and plant lily-of-the-valley.