House Plants Necrotic lesions and foliar tip burn are common on Parlor palms subjected to fluoridated water. Chinese evergreen, Peacock Plant, Spider Plant, Ti Plant, Dracaena, Dragon Plant, Peace Lilies, Cast Iron Plants, Prayer Plants, Easter Lilies, and Spineless Yucca are also sensitive to fluoride. Superphosphate fertilizer, perlite, fluoridated water, and some peats are sources of fluoride. Fluoride toxicity is seldom fatal. It can be managed by insuring that the soil pH is between 6.0-6.5, and avoiding the use of superphosphates.
Source: Sherrie Smith University of Arkansas Cooperative Extension
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