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Peace Lilly, Black Leaves

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From: B Zalud
City:
Harvard, IL
I have a two peace lilly plants. Leaves on both plants are turning black. Starting at the edges and consume the hole leave. When black, the leave is dry and crumbly. I usually water once a week or twice if the leaves start to droop. I use well water (nitrates could be high). One plant is about 3 years old and the other is less than a year. The older one may be root bound, but he younger one is definately not root bound and the younger one seems to have the problem worse. I've been fertalizing once a month with miracle grow (diluted) to see if it helps, but doesn't seem to be. Both get good light, but not direct light. Neither are exposed to heavy handling. Any suggestions?

 
Extension Message
From: Greg Stack
Extension Horticulturist
Office of Web Development
gstack@illinois.edu
Hi,

black margins and tips on foliage plants usually suggests the the plants are suffering from soluable salt build up in the soil. This happens because when watering is done one does not allow for proper leaching of the soil each time and as a result salts build up, burn roots and this translates to brown margins. It is suggested that each time you water put on enough water so water comes out the holes in the bottom of the pot. This results in leaching. I might suggest that you take the pot to the bath tub and run lots of clear water through it to first flush the soil. Wait until the top inch or so is dry and then water. I might also suggest you not use any fertilizer right now as that can contribute to salt build up. Hopefully with good leaching the new leaves coming out will not be affected as much if at all.

 
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