If the problem is shade from an overhanging tree, you may be able to prune back some of the branches to let in more light. Jan 31, 2012 - rather than grass plant sedum!! Sedum grows quite shallowly in the ground, so the easiest way to get rid of it is to simply pull it up. Grass growing in sedum matting often indicates that a roof has been watered a bit too well. A little grooming and the right location can improve their appearance and decrease your workload. One Possible problem with Sedums A small downside with some taller Sedums is that can be lax in habit with plants not standing upright and they have a tendency to spread outwards with a bald centre. Treating stem rot can be difficult and in severe cases may involve replacing all of the soil. If the roof is shaded by other buildings then you’ll probably need to accept that it’s going to grow moss instead of sedums. Plants Lanky; Poor Flowering - Soil too Rich. Long lived and drought tolerant, award-winner Sedum 'Purple Emperor' is a lovely sight in the landscape with its masses of rosy-pink flowers, densely packed in large umbrella-shaped flower heads, and showing off atop bright reddish-purple stems clad with dark purple, fleshy leaves. Sedum âTricolorâ is variegated with green, white, and pink hues in its leaves. Are you up to date with your feeding program? Sedum spectabile âAutumn Joyâ A hybrid between Sedum telephium and Sedum spectabile ; it is an upright shrubby sedum reaching 1-2 feet tall and 2 feet wide. Red-coloured foliage on a living roof is not always a cause for worry. Root rots are caused by Fusarium fungi species and produce similar symptoms that are more centralized in the sedumâs roots. Most flowering plants wind down as fall approaches, but this hardy perennial grows more striking every day. Considered one of the top perennials for fall color, "Autumn Joy" sedum (Sedum x "Autumn Joy") grows in U.S. Department of Agriculture plant hardiness zones 5 through 9. Because "Autumn Joy" Green roofs are dynamic, living things and as such they can sometimes do unexpected things. A fast-growing plant, it makes a good lawn alternative, providing dense, albeit less robust ground cover. Dependable, easy-care plants are always welcome in garden borders, but "Autumn Joy" showy sedum (Sedum "Autumn Joy," syn. Check drainage outlets very carefully and if that doesn’t fix it, then contact the installers for advice. Green roofs, or sedum roofs, are growing in popularity throughout the UK and globally, partly due to the growing environmental concerns and focus on minimising the impact on the environment. Plants with soft, sappy stems and leaves are probably in soil that is too fertile, and oversupplied with nitrogen. Control stem rot in the sedums by cutting away and destroying all the diseased or symptomatic plant parts. Several different leaf spot diseases can infect sedums, including those caused by the fungal species Cercospora, Colletotrichum and Septoria. Stem rot disease is caused by the fungus Sclerotium rolfsii and is one of the most common diseases that affect sedums. The leaves of Sedum are colorful and vary between different cultivars and the season. Apply fungicides like thiophanate-methyl or sulfur to control leaf spot diseases on your sedums. If moss is appearing on a green roof that is not shaded, then the most likely problem is that the sedum plants have been weakened by hunger. Moss is a sign that conditions on the roof are not quite right for sedum plants. Sedum suffers few pest and disease problems as long as soil and foliage remain dry. Basal rot is caused by the fungus Rhizoctonia solani. Sedum spurium is a matt forming low-growing herbaceous perennial that ranges in height from three to six inches (7.5â15 cm), and has a spread of sixteen to twenty-four inches (40â60 cm). The gray mold spreads to the healthy plant parts as the disease progresses. Copyright Leaf Group Ltd. // Leaf Group Lifestyle. Sedums, including the ever popular Autumn Joy, prefer full sun and well-drained soil.They tend to flop when grown in the shade and overly moist soil. Sedum spectabile 'Iceberg' has mainly white flowers and is a slightly smaller plant, growing to a maximum of about 16 inches. Problems of Sedum. Noteworthy CharacteristicsFoliage colors ranging from smoky blue to rich burgundy throughout the season.Seed heads provide autumn interest. The red colour indicates stress, normally due to inadequate water over an extended period and happens when the plant âswitches offâ its ⦠By the end of the season you may find sedums falling over from the weight. Stem rot causes the sedumâs lower leaves to turn yellow and white, cotton-like growths of mycelium to appear around or near the crown on the soil. Sedums, also called stonecrops, are perennial flowering plants with succulent foliage. Sedum telephium "Autumn Joy" and Sedum spectabile "Autumn Joy") earns a special spot with its dazzling fall display. This can be a problem when Sedums are grown in too much shade, or rich soil. Once you have one sedum, it's easy to make more by taking stem and leaf cuttings or dividing the plant. Sedum Album. They are most often grown for their colorful, clean foliage and ease of culture. Do not ⦠Several different leaf spot diseases can infect sedums, including those caused by the fungal species Cercospora, Colletotrichum and Septoria. Sedums are low-maintenance plants that are susceptible to only a few fungal diseases, most of which are prevented by planting the sedums in well-draining soils. Often no more than periodic visual checks and minor weeding are required. Other causes ⦠Treat powdery mildew by applying an appropriate fungicide, such as potassium bicarbonate, triadimefon or thiophanate-methyl, to your sedums according to the instructions on the label. Sedum Autumn Joy plants are often one of the few nectar producing flowers in late summer, feeding bees and other insects. Leaf spots appear as lesions or as decomposing or necrotic patches on the sedumâs leaves and occur most often during wet conditions. Sedum sieboldii. Without regular maintenance, costly remedial works could be required further down the line to correct problems that could have been dealt with easily. Root rots are caused by Fusarium fungi species and produce similar symptoms that are more centralized in the sedumâs roots. Hand weeding will remove unwanted plants but the easiest thing to do is wait for summer and hope for a long period of drought which will kill the grass plants. Sedum Album â tiny white flowers on arching stems â lovely! Plan the perfect garden with our interactive tool →, The Connecticut Agricultural Experiment Station: Sedum Plant Health Problems, National Gardening Association: Plant Care Guides â Sedum, University of Illinois Extension: Plant Palette -- Sedum. Although some species of sedum plants go a lovely deep red colour during the year, most are green when healthy. They are leaf succulents found primarily in the Northern Hemisphere, but extending into the southern hemisphere in Africa and South America. SedumSod. Otherwise known as the White Stonecrop â this one is native to the UK. This fungus rots and collapses the basal stems and turns them black or brownish. It could be too damp, too shady or low in plant nutrients. Never mow! This is something that should have been considered at the design stage. Great for ⦠Treat both infections with sulfur if they persist. 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