Q.Hibiscus Leaf Has Brown Spots, What Is It?
Brown spots on Hibiscus leaf, what should insecticide should I use?
Certified GKH Gardening Expert
Not insecticide- Fungicide!
This is a soil borne infection that happens, normally, from saturated soils. You will need to treat with a fungicide/bactericide, and adjust watering habits if possible.
Make sure to let the soil dry out, thoroughly, down to about 2 or 3 inches between watering. This can help to prevent future infections.
Here are some articles that will help:
https://www.gardeningknowhow.com/garden-how-to/info/using-fungicides-in-garden.htm
https://www.gardeningknowhow.com/special/organic/biofungicide-information.htm
https://www.gardeningknowhow.com/garden-how-to/info/homemade-fungicide.htm
https://www.gardeningknowhow.com/garden-how-to/info/applying-bactericide-to-plants.htm
https://www.gardeningknowhow.com/ornamental/flowers/hibiscus/how-to-care-for-hibiscus-plants.htm
