Getting the right combination of sun, air, soil and water will keep the natural balance of your soil in check. This happens because it is a plant called “short days”, that is, it needs at least 13 hours of darkness a day to start its flowering process. We recommend our users to update the browser. The plant is native to Africa. There are a few things that cause poor drainage: incorrect pot size, lack of drainage holes and dense soil. Once you’ve removed and treated the mold, it’s important to address what allowed mold growth in the first place. You can wipe this away with alcohol on a sponge and treat the rest of the plant by spraying it with a strong blast of water. Andrew Gaumond, horticulturist, botanist and director of content at Petal Republic, explains that “white mold is relatively harmless to the overall health of the plant,” while “fungal mycelia can be a real issue.” Although fuzzy, white mold on its soil may not hurt your houseplant, the conditions that allowed such mold growth will. Potting mix is specially formulated for container gardening. Many houseplants come with care instructions, but Levi says not to adhere to them. Phytophthora occurs in Kalanchoe plants when the soil is too wet for too long it is a fungus that attacks and kills the roots and then slowly makes its way up the stem, leaving black mold wherever it goes. These plants only grow about 1 foot tall, but put out masses of beautiful star-shaped blooms in pinks, reds, yellows and salmons throughout winter and spring. Select a clay pot between 4 inches and 8 inches wide, and 6 inches deep with a good drainage. Shake to mix thoroughly, and spray it on the affected plant daily. Powdery mildew on kalanchoe often appears more like edema, with affected tissues scarring or cracking. Indoors, this will probably mean you'll only need to water every 2 or 3 weeks, but be sure to check regularly. Kalanchoe pinnata produces dark green leaves with serrated edges. When this happens, it is actually mold growing on the honeydew. Simply wipe off the mold and sprinkle the spot with some cinnamon from your spice drawer. In its natural habitat, the kalanchoe flowers towards the end of winter at the beginning of spring. Temperatures between 60 and 80 degrees Fahrenheit and indirect lighting encourage the development of these spores, although standing water on leaves will kill powdery mildew spores, unlike with other fungi. © Copyright 2020 Hearst Communications, Inc. It is a vertically growing plant with branches and ramifications. All succulent & cactus mix would be fine with a bit compost mixed in. Poor water drainage can also lead to excess moisture. For this reason, kalanchoe plants should not be left sitting in very wet soil, or watered too often. It depends on the type you’re dealing with. This symbiotic relationship is why living soil is so favorable. You can also try to drill holes into the pot, but clay or ceramic pieces may shatter. Since 2010, she's written on a wide range of personal finance topics. Wait until the soil … It won't hurt anything on top of your soil … Remove dead pieces of the plant before they pile at its base. Phytophthora is a disease that sometimes affects kalanchoe plants, according to Dr. Kessler. Be sure that when you are watering, the leaves aren’t getting wet, and the soil is drying out completely between waterings. Dry conditions are better than wet for this plant. It has lightweight peat moss and perlite, which help drain water. Understanding what caused the problem and how to get rid of it will keep your garden and home happy. 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