Answer: Sedum, or Stonecrop, are succulent perennials suitable for rock gardens. They thrive in full sunshine, but will take considerable shade, and require very little water. From your description, you're growing Sedum 'album', a creeping evergreen plant that grows about two feet tall. The fleshy leaves are 1/4 to 1/2 inch long, light to medium green, and the flowers are pinkish. This is a vigorous groundcover-type sedum and should grow well in your garden. The gravel around the plants should not present a problem. The symptoms you describe indicate the plants are being overwatered. Hold back on the water, applying only just enough to wet the rootmass once each week. Sedums make a tough, almost maintenance-free groundcover or rock garden plant. Once yours become established, you'll be happy with your choice of plants.
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