Getting Rid of Brown Spots From Gardenia Bush
Have sprayed bush w/Talstar insecticide per our landscape guy. Doesn't remove brown spots. Have tried cleaning leaves one at a time, very time consuming. HELP!
Certified GKH Gardening Expert
It is either fungus or scale. Neem oil can help with both. Here is more information: https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm
If the "spots" are on stems, they may be scale. If spots are on leaves, those will either have to be picked off or let them fall off.
Hopefully these articles will help: https://questions.gardeningknowhow.com/tag/gardenias/page/54
check additional articles at the end of this one: