Gardenia Leaves Are Spotted

Question

Hi! I have 2 gardenias, each in a big pot on a stand so they can drain. I bought them from a nursery last month and they bloomed beautifully. Now they aren’t blooming and many leaves are yellow or have dark spots, but many leaves look dark green and healthy. I have fed them coffee and a bit of vinegar one time each. They are facing east and get morning sun, afternoon shade. I just now cut all the damaged looking leaves in hopes it can be revived. Advice please?

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Answer 1

They can be very sensitive! I would change them out of that soil, and only feed them feeds labeled for Gardenias to avoid any issues. Be sure to keep soil test kits around to test soil, frequently.

https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/testing-soil.htm

https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/soil-ph-plants.htm

https://www.gardeningknowhow.com/ornamental/flowers/gardenia