The stalks of corn plants turning black, developing fungal spots, or rotting could be due to excessive moisture, which exacerbates fungal issues.
Recommendation:
- Try to remove any rotten or yellowing parts of the leaves. Then, spray Mr Ganick Organic Plant Acid on the stalks and the canopy of the plant once a week, up to two times at most, to help reduce fungal issues.
- The blackened areas may not necessarily be removed, but the occurrence of fungal spots on the leaves, especially on new leaves, will decrease.
- Consider adding additional drainage channels to allow excess water to drain away. This prevents excessive moisture, which can lead to root and stalk rot.
