Fluoride Injury
Fluoride toxicity is a common problem that mars the appearance of many foliage plants including ']anet Craig', 'Warneckif, 'Massangeana' cane, spider plant, Cordyline, parlor palm, Calathea, Maranta and Yucca. Often fluoride injury is so severe that replacement is required. One of the sources of fluoride is fluoridated municipal water, added to water to prevent tooth decay. [...]