Chose a spot with ambient sunlight; a north-facing window can help. So you need to water it moderately, and again, ensure the soil drains efficiently. Only move the plant back to its regular spot when the problem disappears. Treat fungus promptly by spraying a fungicide that's suitable for use on houseplants,. Once youve identified the problem, you can take the necessary steps to get your plant back on track. Flush soil with distilled water to remove the excessive salt build-up. On the other end, make sure that your plant is never sitting in watering for extended periods of time and always ensure that you have a drainage hole. These spots can be caused by a number of different things, but the most common cause is too much sunlight. If its not getting enough light, youll see the opposite problem: brown spots on the leaves. 3. Older lesions may have a wet glistening appearance due to bacteria exuding from infected plant tissue. 541 likes, 5 comments - Alessia Resta (@apartmentbotanist) on Instagram: "Finding spots in the apartment for plants is always challenging. Finally, if all else fails, you can always bring your plant to a professional for help. If you think your plant is getting too much water, try letting the soil dry out a bit before watering again. It's like they come out of nowhere and slowly eat your plants until leaf by leaf gets all wrinkly and dry. Could the white spots be indicative of a nutrient deficiency? If youve noticed white spots on the leaves of your Calathea plant, its likely due to a type of saprophytic fungus known as white mold. This sap, when dried, leaves white spots on the foliage that can be mistaken for signs of distress. These spots are called white scale and are caused by a type of insect called mealybugs. If you have insects on your Calathea, dont worry! An excess of minerals in the water supply is also another typical cause of unhealthy and curled Calatheas. 4. It thrives even in . Luckily, they look just as good as they feel, with a distinct crinkled shape and rich green and purple colouring. Arguably one of the more problematic pests, spider mites are a member of the mite family, and they love to hang out on the underside of plant leaves. Repeat this process a few times to ensure all the bugs are gone. If you have Calathea in your home, you may have noticed small white spots on the leaves. Thoroughly clean the leaves undersides, and apply the soap/oil to all of the leaves according to the instructions on the packaging. Sticking close to the surface, the brown or green bug may just look like a raised section of plant material. Just be sure to follow the directions on the label carefully, as you dont want to damage your plant. Its location must be out of any strong winds from doors or windows. The lower surface might also feel sticky due to the webs the mites are building up. These plants are native to the shady rainforests of Brazil, so theyre not used to strong sunlight. It may turn tan or brown when it dries up and have a paper-like texture. Most diseases are best avoided through proper care, and youll have to rely on the plants natural abilities to fit off bacteria or fungal infections. Overwatering is the most common cause of edema, so it is important to be careful not to water your Calathea too often. Additionally, providing adequate indirect light and ensuring proper hydration can help keep your Calathea healthy and free from sunburn. If youre noticing white spots on your Calathea leaves, dont fret! One of the most common causes of white spots on Calathea leaves is mineral build-up from hard water. Some common diseases of Calathea are summarized in the table. I've found that Calathea hold grudges. The drainage hole at the bottom of the container is the most crucial feature needed to grow this plant. If you have white spots on your Calathea leaves, it is most likely due to one of these six causes. 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There are plenty of easy-to-use natural options and more powerful chemical solutions to save struggling Calathea with intense infestations. If you cant find horticultural oil from a local supplier, plain Canola oil works well as a substitute. To prevent white spots from forming on Calathea leaves, keep the plant in warm and semi-humid conditions, water regularly and provide good nourishment, and keep the leaves away from direct sunlight. Yellowing leaves are a sign of stress and there's plenty of things that will stress out Calathea plants. Diseases such as algal leaf spot, anthracnose, and septoria leaf spot can cause brown spots on Calathea leaves. If this is the case, youll need to treat the plant with a fungicide. But its actually sucking the fluids out of the plant and leaving behind honeydew that attracts other pests and diseases. Overwatering. There may be a harsh or brittle feel to the leaves, and the margins of the leaves may split when stroked. When calathea leaves receive full sunshine, the chlorophyll takes control, and the distinctively dark and light patterns on the leaves soften and fade. It is recommended to repot your plant once every 2-3 years. If you notice white spots or streaks on the leaves, its a good idea to start using distilled or filtered water for your plant. Powdery Mildew One distinct thing you'll observe with calathea leaves infected with powdery mildew is the presence of a powdery white texture. Edges of Calathea Leaves Turning Brown and Brittle, 3. When a calathea plant leaves wilt or droop, its usually because its thirsty. Shipping Height 10 in. After trying these suggestions, remove any irreversibly damaged leaves with gentle pruning. He holds a BSc degree in Plant Sciences and has trained professionally at leading floristry schools in London and Paris. By the time the webbing is easily visible to the naked eye, you have a serious mite problem on your hands. Calathea prefers to be kept moist. All you need to do is wipe down the leaves with a damp cloth and replace the growing medium if necessary. Increase the humidity around your plant by misting the leaves on a regular basis, using a pebble tray, or moving a humidifier nearby. Calatheas will surely spark an interest for you to start a plant collector journey! To remove white mold from Calathea, wash the leaves and stems and clean the growing medium, replacing the first inch or two if necessary. Calathea is more likely to develop a fungal disease from over-watering, appearing as spots on the leaves. As their name suggests, Whiteflies are white and only about 1/10th of an inch long. Your Calathea will likely spend at least 1-2 months growing new, healthy roots before producing any new foliage. For nutrient deficiencies, fertilize the plant with a nitrogen-rich fertilizer. So, immediately check the soil if you . Limit the amount of time your calathea plant is exposed to direct sunlight to 2 to 6 hours every day. They puncture the tissues and suck the moisture out. However, even thoroughly wiping away spider mites or thrips wont completely solve pest problems. Pests, including spider mites and mealybugs, are also common. If the roots are rotting, stop watering the plant immediately until they revive. Be sure to follow the instructions on the label, as these products can be harmful to humans if used incorrectly. Common symptoms are rapidly withering leaves, reduced development, and a decaying brown base. Another common cause of white spots on Calathea leaves is too much water. They prefer 50% humidity and up, with higher numbers better for them due to their adaptation to native jungle habitat. Unfortunately, this is a very generic symptom. White Crystals on Calathea Leaves. If you cant figure out whats causing the white spots on your Calatheas leaves, take a sample of the affected leaves to your local nursery or garden center for help. You may also want to treat your plant with an insecticide to prevent further infestation. Ensure the soil you choose drains quickly. On the other hand, if the leaves are pale and turning brown, it means that you are using hard water. Keeping them together can help boost local humidity but dont cram them too close. So, if your plant is old, it might just be natural shedding the leaves to allow new growth. Gray mold (Botrytis) can be a problem for Calathea plants. For larger mold infestations, spray the affected Calathea leaves liberally with a solution from two teaspoons of milk diluted in one quart of warm water. The most common causes of yellowing of Calathea leaves are pests, lack of light and excessive watering. It's similar to the problem above in some ways because the mess seems to cluster around the primary vein of the leaf, rather than all over or in random places. i.e. 5. There is still a chance of bacterial infection causing spots on the leaves or root rot setting in if the plant receives too much water. Thrips are tiny bugs that can cause white spots on Calathea leaves. But to your naked eye, youll notice black spots on leaves that are drying up and turning yellow. There are a few things you can do to get rid of thrips. Leaf spot fungus often goes untreated because it is mistaken for crispy leaves. Its important to keep the plants soil wet but not soggy. . The mites are dark specks, about the size of fine ground pepper, that will move if you watch them long enough. Pesticides and insecticides help protect your houseplant when nothing else will work. Adding a few tablespoons of cinnamon on top will help prevent a reoccurrence. Fungal infections, pest damage, or nitrogen deficiency are possible causes. With a little bit of care, your Calathea will be healthy and beautiful in no time. Aaditya Bhatta was born and raised in the city of Kathmandu, in the beautiful mountain state of Nepal. Move your Calathea to a warmer place, away from other sources of unexpected temperature swings. To enable splash of colors, you can blend it with the other varieties on this list. Some diseases interfere with their growth and may require treatment. If you keep them in low-humidity levels, misting can also help to combat drying. You may need to treat your plant multiple times to get rid of all the scale. To remove them, wash the leaves and stems, then clean the growing medium. Containers with multiple 1/4-inches to 1/2-inches diameter drainage holes are recommended for your Calathea. Discover the causes of white spots on Calathea leaves & easy solutions to restore your plant's health in this guide! Calathea white star thrives in moist soil, and its leaves shrivel easily when the soil dries out. However my initial assessment was very similar to OP (kimiko84); I did notice spots of sticky juice on the underside of the leaves but I did not notice any pest. If there a puddle of water left on leaves it can cause water spots. Common names: White star Calathea, majestic prayer plant. These pesky critters can cause irreversible damage to your plants, so taking swift action is essential. One common cause of white spots on Calathea leaves is mineral build-up from hard water. Scale insects are relatively rare indoors compared to other pests, but they can go overlooked for a long time. What are the causes of white spots on Calathea leaves? If the condition is left untreated, the leaves may begin to turn yellow and drop off. 2. Calathea plants tend to get overwatered because they require high humidity, making them prone to bacterial or fungal infections. The browning of leaf tips on older foliage is completely normal and results from tremendous photosynthesis throughout the leafs life. 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