Crassula ovata, commonly known as Jade Plant, is a classic houseplant, especially for the neglectful homeowner. It prefers bright light and occasional water in the warm season, but other than that, the plants are fairly self-sufficient. You may still find white spots on the leaves of the Jade Plant in good condition, but if the plant's overall health is good, you should not worry too much. So what causes white spots on a Jade Plant? It may be a natural phenomenon or a bit of a fungal disease, but either way, there are easy methods to define and deal with the problem.
What Causes White Spots?
The actual cause of the white spots on the leaves of the Jade Plant might be powdery mildew or even a condition where the plant stores salts and "sweats" the excess out through its leaves. One cause has a quick fix, and the other requires some cultural adjustment and treatment. However, both are not all that harmful to your plant, and learning how to get rid of white spots on Jade Plants is a matter of some quick steps.
Powdery Mildew
Most gardeners are familiar with powdery mildew. It occurs when there is low light, improper circulation, cooler temperatures, and excess humidity. Overhead watering leaves foliage damp, which tends to stay moist for a long period in winter. This promotes the formation of fungal spores that cause powdery mildew.
Avoid overhead watering and use a fan to increase circulation. Pinch off affected foliage and discard it. Baking soda and vinegar solution is how to get rid of white spots on jade plants with powdery mildew. Spray on the leaves but ensure the leaves dry within a few hours.
Overhead watering may also leave hard water spots on the leaves.
Excess Salts
All plants uptake water through their roots, with a few rare exceptions. Jade Plants store water in their fleshy leaves, making them ideal species in arid zones. They capture infrequent rainwater and store it until they need it, much like a squirrel hoarding nuts. This gives the leaves their plump appearance.
Rain and groundwater alike capture salt from the air and soil. When you water with a salty solution, the trapped moisture will go through the leaves during transpiration, and the evaporated moisture will leave a salt residue on the leaf. Therefore, your Jade Plant has white spots on the surface of the pads. A soft, lightly moist cloth can easily wipe these away and restore the appearance of the foliage.
Other Reasons for White Spots
Jade Plants often get a condition called Oedema, where the roots take up water faster than the plant can use it. This causes corky blisters to form on the foliage. Reducing water should prevent the condition, but the blisters will remain.
Rarely may you find a Jade Plant with white spots, which are actually insects. For example, mealybugs have a whitish-silver fuzzy exterior. If your white spots are moving under close observation, take action, and seclude the Jade Plant from other plants.
The spots may also be a variety of scales with silvery bodies. Both can be conquered with a systemic insecticide formulated for houseplants or by dabbing them with a 70 percent solution of rubbing alcohol.
Jade Plant is not usually prone to insect infestations, but if you put the plant outdoors for the summer, take a good look at it before bringing it indoors and infecting your other flora.
Source: gardeningknowhow.com
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