crystalline crust over the surface after removing the brown brittle leaves and leaving only the leaves that were yellow with black tips or green a plant rejuvenating mixture was made using 100 dhea tablets each containing 5 mg dhea 38 mg dicalcium phosphate and trace amounts of cellulose silica and magnesium stearate the tablets were added to 0 5 l water previously heated to 145 degrees fahrenheit the tablets were allowed to degrade for 10 minutes prior to adding 1 5 l cold water at about 55 to 60 degrees fahrenheit preferably at a temperature ranging from 40 to 75 degrees f the resulting plant rejuvenating mixture was then stirred and used to saturate the soil of the philodendron the remaining plant rejuvenating mixture was retained and administered monthly to the plant until the mixture was gone the plant rejuvenating mixture was re prepared in the same manner and applied monthly for the following twelve months although some of the yellow leaves died most of the leaves regained full color with a darker shade of green than originally observed the soil lost the white crust and the plant grew in size to the extent that it had to be transferred to a larger container after the transfer the philodendron was intentionally neglected by providing random amounts of water minimal sunlight low temperatures and winter transplantation four months later the original symptoms were again.