Common Issues and Solutions Something wrong with your Calla Lily? It could be suffering from improper watering, nutrient deficiencies, pests, diseases, or environmental stress. Calla lilies (Zantedeschia) are admired for their striking appearance and elegant flowers, but they can encounter various problems that may impact their health and.. Bacterial soft rot of Calla lily is caused by Erwinia carotovora . The soft rot infection begins in the upper portion of the corm and progresses upward into leaf and flower stalks or down into roots. Affected plants appear stunted and leaves turn yellow. The soft rot progresses throughout the tuber and plant eventually collapses and dies. The infected corm becomes soft, brown and watery.
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Soft rot may be secondary to many other diseases such as those caused by Pythium. The disease is favored by moist conditions. Frost can also cause a meltdown of the entire plant. The bacteria survive in old plant debris and infected rhizomes. Transplanting, irrigation water or cutting and digging tools can spread the bacteria.. However, like all plants, calla lilies are prone to various diseases that can affect their growth and appearance. In this article, we will discuss some common calla lily plant diseases, how to identify them, and the best treatment options.