My hydrangeas look awful! Is this an insect or a fungus issue? We’ve recently received about 12-15 inches of rain in the last 3 weeks. Could that be the issue? I recently purchased chelated iron, but I’m nervous to apply it.
Certified GKH Gardening Expert
This is, most certainly, a soil born infection. This can be due to heavy rains, and excessive moisture, along with the fact that hurricanes are notorious for bringing in new pathogens that plants in a specific area are not acustomed to.
I would recommend dolomitic lime and wettable sulfur. Applying these together will help kill off anything infecting the soil, as well as condition the soil back to a more suitable pH. It also contributes nutrients such as sulfur, calcium, magnesium, carbonates and improves soil quality.
This article will give you a good breakdown of hydrangea care: https://www.gardeningknowhow.com/ornamental/shrubs/hydrangea/growing-hydrangeas-hydrangea-care-guide.htm