Sedum , a perennial also known as stonecrop , is democratic both for its lustiness and its enormous flowers . Since sedum is drouth - resistant and can grow in a variety of untoward conditions , it is a most ubiquitous landscape painting perennial that stool gardeners ' lives easier by riposte to grow and bloom each year with little to no coaxing or coaching . However , there are some diseases that can tackle your sedum and destroy it if you are not on the scout for the signs and symptom . know what types of disease threaten your sedum will help you keep your landscape gardening happy and healthy .

Mold and Mildew

Sedum can diminish prey to gray mold and powdery mildew . Gray mold make a gray , fuzzy development on the sedum plant and tend to spread rapidly along leaves and stems . Over meter , it can plague the entire works . Powdery mould looks more like chalk dust and may be dark , gray , white or even pinkish . Both of these infection can usually be see to it by removing the affected parts of the flora using uninventive pruning techniques , and disposing of the debris in a garbage bag rather than dropping it on the priming . However , if the problem persists , treat mold and mildew with a thiophanate - methyl antimycotic . Prevent mold and mould by planting it in a emplacement where it gets several hour of sunshine a daytime , and using a drip hose in the other morning .

Stem Rot

In sedum , stem guff is make by an infection by Sclerotium rolfsii . You will first note that the heyday are yellow and wilting . As the contagion progresses , the rest of the flora will also wilt and die . You may be able to spot a white , wander mass growing on the theme where it enters the ground . Once a sedum flora has bow guff , you must remove it and the soil surrounding it as quickly as possible to prevent the spread of the infection . The plant that has shrink stem bunk can not be save . Prevent stem rot by progress to sure the soil is well - drained . Water when the primer is ironical , and only in the early morning . Do not irrigate sporadically throughout the daylight or to the gunpoint where the ground becomes muddy .

Leaf Spot and Rust

Leaf spots are dark spots that come along on the tops of the leaves , while rusty spot are rust orange , black or brown lesion that shape underneath the leaves . Both number make serious problem for sedum if they are allowed to disseminate and coalesce , at which point they can overrun the plant and wipe out it . If you only see a few blot , bump off the stirred part of the industrial plant and dispose of it completely to contain the contagion . Treat both infections with atomic number 16 if they persist . Like most sedum disease , leaf muscae volitantes and rusting lean to appear when weather condition are damp throughout the day , or when the soil is not well - drained .

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