Spores are produced on the lower side of the leaf and dispersed by wind or water droplets, infecting new foliage. The page can be found here. Remove plant debris from underneath the plant as well. Although Heucheras are typically trouble free plants here in Washington, they can be prone to a few pests and diseases. Use clippers that you rub down with rubbing alcohol in between each snip to remove all affected foliage and dispose of it in a sealed plastic bag. Young leaves can become puckered and distorted and heavily-infected older leaves may turn brown and shrivel. Heucheras have their own special type of rust called Puccinia heucherae, it won't spread to other plants in your garden. Treatments for Heuchera Disease. Identifcation. We have written a special page about this increasingly common problem. Symptoms first appear as depressed brown spots on the topside of the leaf. Pest and Life Cycle – (Puccinia heucherae) Heuchera rust is a fungal infection which prefers warm, humid conditions and poor air circulation. Heuchera rust results in small brown spots, sunken depressions or raised bumps on the upper leaf surface corresponding to raised, orange to brown spore-producing pustules on the underside of the leaves. Heuchera Rust. While walking the garden recently we spotted the signs of rust, a fungal disease found on Heuchera and its close relatives. If you are dealing with a leaf-spot infection or a mold and mildew infection, then sterile pruning is the answer. Rust prevention is a simple process that needs to be repeated about once weekly. Space plants for increased air flow and drying. Heuchera Rust. In either case the only true solution is … To be certain, it is unlikely fungal as the pattern of "infection" does not cross the veins for the most part. Posted on July 22, 2012 by soulofagardener. The pustules may turn a greyish-white colour under humid conditions. Simply spray your solution onto the stem areas and the underside of your plant's leaves--which is where the rust typically begins--until every surface is thoroughly coated. One of the first signs is dimples on the surface of the leaf. It will help you positively identify it and describe the various treatment options available. Heuchera Rust – puccinia heucherae. Pseudomonas leaf spots are sunken and angular then becoming necrotic. Botrytis may cause irregular necrotic spots or blights along leaf margins or along leaf veins. As Heuchera tends to be a shade loving plant I have treated it as abiotic, likely sunscorch. please read on. It only likes Heucheras so that is great news for the rest of the garden, bad news for our Heucheras….. but dont despair…. HEUCHERA RUST Heuchera Rust can be identified by small rust coloured raised areas on the underside of leaves. Cultural control. 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