Peace lilies ( Spathiphyllum spp . ) make for well as houseplant because of their distinctive leaf and undemanding character . They produce outside only in the icing - free climates of U.S. Department of Agriculture plant hardiness zone 10 through 12 . Because they are most likely grow out of their tropic element , public security liliesmight modernise yellowing leaves — known as chlorosis — from a number of causes .
Environment
Step 1
Peace lilies issue forth from the tropics of Central and South America or the Malay archipelago , the island string between Southeast Asia and Australia . A rain forest floor indweller , pacification lilies develop best in moist , well - draining land rich in humus . Their plate surroundings is warm — between 65 and 90 degree Fahrenheit — with in high spirits humidity and fond to full tincture . A home ’s interior is no substitute for the rain woodland floor and the industrial plant signalise problems in several ways , including chlorosis .
Water
Peace lily leave-taking will yellow when the industrial plant bring forth too much water system . Water leaches quickly through its native soil , so the works can not stand firm soggy soil . yellow leaves let on the industrial plant ’s effort to compensate for engorged tissue and decompose roots by reducing its top growth . leaf may also yellow with too little piss although your first clue will be a general drooping of the plant . If left dry too long , the parting will begin rick xanthous as the plant starts to go dormant . If water is retained around roots , repot the works in a compost - heavy potting mix and let the plant to go dry to the point of offset to droop a scrap before tearing .
Fungal Root Rots
In addition to decay cause by too much water , peace lily support from two fungal ascendant rot disease . Cylindrocladium ascendant rot , triggered by the fungus Cylindrocladium spathiphylli , travel from plant to plant . Its first sign is yellowing lower leaves and , now and again , slight wilting . By the time chocolate-brown spots begin develop and scummy portions of the folio stalk begin rotting , the flora is a goner . The second fungus , Pythium parasitica , is a soil - borne fungus that thrive in stiff and waterlogged soils and can be spread by fungus gnats , a vulgar cuss in potting land that has spend the summertime outdoors . Its symptom let in chlorosis — yellowing leave and droop farewell . Both root rots play quickly to produce a dim , bathetic mussiness of roots and lower crown .
Other Causes
Yellowing leaves might be a sign your peace of mind lily lacks two micronutrient — iron and manganese , peculiarly in wintertime when the soil tingle . Try set the plant on a warm airfoil , such as a radiator thug , where the soil can warm up , before add together fertilizer with micronutrients at a rate of 1 teaspoonful per 1 gallon of water , or according to package guidance . whitefly may cause yellow spots on leaves , but are potential to look as the white cloud that rises when plant leave of absence are disturbed , long before they do enough damage to stimulate icteric spot . If only a few leaf yellowish and snuff it , your peace lily may be molt a few old leaves to make room for newfangled growth .
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