Mexican Sunflower – Dying Leaves

Question

We have several giant Mexican sunflowers. Leaves are constantly dying, which makes the bushes much less attractive. Do they need to be sprayed with something to counteract this? Thank you!

Answer 1

It may have a fungus. This could cause the leaves to brown and die. You can spray the shrub with a fungicide to treat this possibility.

It may also be getting too much water. It is a plant that likes it drier than wetter. If the soil is not drying out enough between watering, this can also cause brown leaves.