They are hardy in USDA zones 2-11. Pastel colors tend to stand out the best in shade. Apply a fungicide registered for use on impatiens. It is recommended not to plant in the same area for two consecutive years, to remove weeds that are also susceptible and to remove infected plant debris and plants. It is also important to remove any infected plant matter as soon as possible. I transplanted the majority outside but kept one indoors. Impatiens prefer part or full shade. You can find modern impatiens cultivars in colors right out of the crayon box, including red, salmon, orange, salmon, pink, purple, white and lavender. This disease is worse when it is wet and humid for long periods of time. Fungicides can be applied but are not usually necessary for this type of leaf spot. She is also the online education examiner Minneapolis for Examiner.com. Impatiens … The key to healthy impatiens is to keep the soil moist at all times but never soggy. How to Treat Leaf Spot Fungus. Generally considered weeds, but if they are in the area, they can spread the disease to your landscape Impatiens. Due to their short growing season, annuals flower almost continuously, more than most perennials. Pseudomonas syringae can be controlled by removing infected plants and debris. Answer (1 of 1): Sounds like you live in an area where the humidity is high. It is also important to water and space plants properly. Bactericides are not very effective in controlling this disease but are still available at garden centers. My impatiens still have yellow leaves. The best way to control leaf spot is to spray a fungicide every 2 to 3 weeks. There are several different types of leaf spot diseases that can affect impatiens. The leaves are generally bright green, with some varieties having bronze-colored leaves. A wilt disease works its way up from the base of the plant, causing leaves and branches to wilt and die. Very tiny black specks also appear that are the part of the fungus. They have blossoms with spurred petals that come in many colors, including white, pink, rose, peach, lavender and salmon. Plant spacing for air movement is recommended too. There are many varieties of impatiens. If the soil is dry and yellow leaves appear, it's time to water the impatiens. Protective fungicides can be used if applications are properly spaced. Impatiens Necrotic Spot Virus. Adjoining tissues may show dark streaks, and the leaves of the impatiens plant may crack or drop. The brown spotting can be observed on both older, outer leaves as well as younger, inner leaves. This is a problem with Impatiens and Roses. The leaf spots alternaria and cercospora are caused by a fungus. She is published in their book "The Best Plants for 30 Tough Sites." My Leaves Have Brown Spots! Please tell me why my New Guineas are yellowing. An infected plant shows wet spots that turn tan, dark brown or black in color. Again, watering early in the day so that the leaves can dry is crucial to the prevention of this disease. Fertilizing and watering regularly are recommended. Leaf spot is a particular problem with impatiens. I just fed them the Miracle Grow bloom booster liquid food. I planted some impatiens (Burpee's 30959 - Flavours Hybrid Mix) from seed and they were doing really well as seedlings. Troubleshooting: Root rot- over-watering, poor drainage INSV Impatiens necrotic spot virus-leaf & stem ring spots that are yellow, white, gray or brown/black. They were mature plants (6" high) when planted. Only advice I can give you is to make sure your impatiens aren't planted in direct sun. As soon as you see plant leaf spots, treatment begins. I have pink New Guinea impatiens also in pots in another location. Due to their short growing season, annuals flower almost continuously, more than most perennials. Impatiens necrotic spot virus, or INSV, is a virus that eventually kills impatiens after infection. I have … have been planting maintenance free impatiens for years. Wilted plants that have partially decayed root systems along with yellow leaves are most likely infested with nematodes, which are unsegmented roundworms that feed on impatiens. To prevent this, keep the soil moist between waterings. Septoria leaf spot, or septoria blight, is caused by the species of fungi septoria. Also, they don't like a lot of water, so over watering will cause the leaves to turn yellow. Septoria involves proper prevention measures. They are winter hardy, easy to propagate and both their flowers and foliage have terrific visual appeal. The spots appear on the bottom of the leaves first and slowly move up the plant. Sheri Engstrom has been writing for 15 years. Impatiens are the most popular bedding plants in the country. Brown spots on leaves with concentric brown rings like a bull’s eye Brown blossoms or petals; flowers drop off prematurely Gray fuzzy mold develops on rotted tissue under humid conditions No matter how diligent you are, the day will come when those tiny brown circles appear on the leaves of your plant so it’s important to know how to treat leaf spot fungus. Other sap-sucking pests can cause brown spots on houseplant leaves. Every year our impatiens do this. Leaf spotting is most severe in wet weather. It’s a sad day in the garden when you see your impatiens getting yellow leaves. Septoria leaf spot causes tan to gray, purple-bordered spots on the leaves. Impatiens walleriana is the most popular plant in the United States. Septoria leaf spot, or septoria blight, is caused by the species of fungi septoria. They do much better in shade/part sun. 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Leaf spot pseudomonas syringae causes spots or wilting and dying of the leaves. Stem rots attack impatiens stems at or near the soil level. You should prune the leaves and isolate the plant from the other greenery you have growing nearby, if possible. Generally, impatiens are disease-free annuals in the backyard beds, showing off healthy, dark-green leaves. Watering early in the day gives the leaves a chance to dry out. Sign up to get all the latest gardening tips! Plan the perfect garden with our interactive tool →, impatiens image by palms from Fotolia.com, stacked garden pots image by Jeffrey Sinnock from Fotolia.com, colourful spray bottle tops image by Warren Millar from Fotolia.com, Iowa State University: Growing Impatiens in the Home Garden, Missouri Botanical Garden Kemper Fact Sheet: Gardening with Annuals, The Connecticut Agriculture Experiment: Impatiens, University of Massachusetts Floriculture: Leaf Spots. 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