Gardening Questions And Answers
Botrytis blight – Lantana leaves turning yellow can also be the sign of a serious disease like botrytis blight, also called gray mold. This happens in regions with high humidity and causes lantana leaf yellowing and wilting blossoms. In time, if your lantana has botrytis blight, the leaves and flowers rot.
When growing in pots, Lantana appreciate a consistently moist but well-drained soil. Constantly soggy soil can and often will cause root rot or other harmful or deadly plant diseases. Therefore, I suggest using a quality potting soil or potting mix, or a 50/50 combination thereof and a pot that has a drainage hole(s).
Lantana prefers warm temperatures, warm soil and direct sun. This happens in regions with high humidity and causes lantana leaf yellowing and wilting blossoms. If you use overhead watering, you may be making the problem worse. In time, if your lantana has botrytis blight, the leaves and flowers rot.
Known for its carefree nature, lantana is grown as an annual in northern regions, and a broadleaf evergreen shrub or ground cover in frost-free climates. Also known as Spanish flag, lantana thrives in hot, dry weather and is tolerant of salt and sandy soil, making it a popular choice for seaside landscapes.
The initial symptoms of lantana poisoning, weakness and appetite loss, are evident within the first 24 hours of consumption. More serious symptoms will begin to develop over the next several days, such as bloody diarrhea, paralysis, and jaundice (yellowing of the skin and eyes) from damage to the liver.
It should also be noted that the unripened berries are poisonous to humans, and the leaves are highly toxic to animals. Handling plants may cause skin irritation or allergic reactions. Both drought- and salt-tolerant, lantana is a low-maintenance perennial with brightly colored flowers that attract butterflies.