A longstanding favorite for shady areas in the garden, according to the California Gardening Clubs, impatiens can be massed in garden beds or used as a border or edging plant. Thx for ur interest dear. ... leaves may curl downward and a white, fuzzy growth can be seen on the undersides of the leaves. Symptoms of this downy mildew can be very subtle – slight chlorosis (yellowing) or mottling of leaves, leaf edges curling downward, and plant stunting are early symptoms, followed by leaf drop. New Guinea impatiens (Impatiens x hawkeri) are reported to be tolerant of the disease. Follow label instructions carefully for proper timing and application procedures. [How to monitor for downy mildew disease.] Humidity ranges above 85%, most likely about 95-100%. New leaves may appear as … Symptoms of the disease include a subtle stippling and yellowing or chlorosis of the leaves. Since the spores can survive mild winter weather, consider replacing Impatiens walleriana with New Guinea impatiens, which is not susceptible to downy mildew. Not Blooming - I have about 40 crepe myrtles (trees and bushes) and about 7 of my bushes are still not blooming, and⦠Q. Contact options for registered users. Impatiens prefer humus-rich, moist, and well-drained soil. I'd lay off the fertilizer for a bit and see if things get better. New leaves may appear as ⦠New Guinea impatiens, Impatiens hawkerii, are highly tolerant to the disease. You can treat your plants with Neem Oil. These are the most common bedding impatiens sold in garden centers. I have sprayed them with a fungicide hoping that would help. First, in order to keep your plants blooming all summer, pinch off the tops of stems after each flower has bloomed and faded. Most impatiens (Impatiens spp.) Brown spots on impatiens leaves, some may even have holes in the leaves, could be a sign of one of several leaf spot diseases that plague impatiens. The closer impatiens plants are, the taller they will grow, so space accordingly (impatiens plants can grown anywhere between 6 and 30 inches tall). Just a guess. What is wrong I gave them plant food, but haven't over feed them. There’s only one remedy--removal of all infected plants. Soon, white to light-gray fuzz may show on leaf undersides. This deadheading encourages new blooms. Make sure the plants have some shelter from the wind. Infected leaves wilt and curl up, falling from the plant before healthy leaves. It is obvious the plant is relishing the nutrients you are currently giving - … Powdery mildew differs from downy mildew in the spores' appearance. Unfortunately, this disease can infect very quickly and cause complete leaf defoliation or plant collapse to occur. She edited a weekly home-and-garden tabloid for her hometown newspaper and has regularly contributed to weekly and daily newspapers, as well as "Law and Order" magazine. I bought some NG impatiens for the window box on my porch. Scout your impatiens and look for leaves curling downward on newer growth. Verticillium wilt can also affect older leaves while younger leaves nearby stay green and healthy-looking. Q. Spider mites, mealybugs, aphids, and thrips are common and usually result in curled, distorted, or discolored leaves. It is also called gray mold. This Impatiens hybrid was bred from ‘New Guinea’ Impatiens, which itself was already an improvement over common Impatiens as regards heat resistance. Re: Leaves curling up... but is it Mg defeciency? Please tell me why my New Guineas are yellowing. 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