Sedum, commonly known as stonecrop, is a diverse genus of succulent perennials in the Crassulaceae family. The plants store water in their fleshy leaves, making them particularly well adapted to sunny, dry and well-drained sites.
There is considerable variation in growth habit within Sedum. Some species stay low and form dense mats between stones, in rock gardens, dry-stone walls or on green roofs. Others develop into sturdy clumps and flower in late summer and autumn with large flower heads. These taller forms are especially valuable because they combine structure, attractive foliage and a long flowering period.
Most Sedum species prefer full sun and soil where excess water can drain away quickly. Soil that is too rich or constantly moist often produces softer growth and can make plants more vulnerable in winter. In leaner, drier soil, many species remain more compact and sturdy.
Even after flowering, Sedums can retain their ornamental value for a long time. The faded flower heads of taller cultivars often remain standing well into winter and add structure to the border. Many species are also valuable to bees and other pollinators.
Most Sedums grow best in full sun and well-drained soil. Especially in winter, it is important that water does not remain around the roots for long periods. In soil that is too wet, the risk of weak growth and plant loss increases considerably.
Yes. Sedum stores water in its fleshy leaves and is therefore well adapted to dry conditions. Once established, many species need little additional water. Newly planted plants should still be watered sufficiently until they are well rooted.
This usually happens in soil that is too rich, with too little sun or when the plant receives too much moisture. The stems then grow longer and softer. In a sunny position and on relatively lean soil, taller Sedums generally stay more compact and sturdy.
Not necessarily. On taller Sedums, the faded flower heads can remain in place until the end of winter. They provide structure in the garden and are often attractive when covered with frost. Cut the old stems back in early spring, just before the new shoots begin to grow.
No. Low, compact-growing species are the most suitable for rock gardens, dry-stone walls and dry joints. Taller cultivars form sturdy clumps and are better suited to sunny borders or prairie-style plantings. Always check the final height and growth habit of the species or cultivar.
Many Sedums are excellent nectar plants. Summer- and autumn-flowering types are especially popular with bees, hoverflies and butterflies. This makes them particularly valuable later in the season, when fewer other perennials are still in flower.
