Answer: Regen San Jose, CA A.It could be too much water is causes your calla lily leaves to yellow and die. This is especially true if the soil is poorly drained. Try cutting back on watering, cultivating the soil a bit to "dry it out" and removing theyellowing leaves. I assume you used a soilless potting mix on your callas. If not, you should consider repotting them with this lighter mix. If it appears the soil isn't too wet and you are using soilless mix, then the other possibility is lack ofnitrogen. Try giving the plant a light does of a complete fertilizer such as Miracle Gro. Nitrogen helps keep leaves green. You might also consider moving them where they only get morning sun, which is less harsh on plants.
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