Do a soil test. It is highly likely that the plant is suffering in a too alkaline soil. It likes acid (see above) and here: /content/soil-ph-levels
You can do a soil test with a kit from a local nursery/home store (that sells gardening things); it’s quick and easy, and you can see if/how the pH may be 鈥渙ff.鈥 And/or, you can contact your local cooperative extension service and do a more thorough one for a bit more time and money (but not a lot): /content/cooperative-extension-services
On the pH link page you will find guidance for changing the pH. While you’re there, notice the plants and what they like: rhodos and azaleas like acidic soil while lilac likes sweeter soil. Look around your property (if this applies) and see what else in this list is thriving and, possibly, what is fading and notice their pH number.
Do a soil test. It is highly likely that the plant is suffering in a too alkaline soil. It likes acid (see above) and here: /content/soil-ph-levels
You can do a soil test with a kit from a local nursery/home store (that sells gardening things); it’s quick and easy, and you can see if/how the pH may be 鈥渙ff.鈥 And/or, you can contact your local cooperative extension service and do a more thorough one for a bit more time and money (but not a lot): /content/cooperative-extension-services
On the pH link page you will find guidance for changing the pH. While you’re there, notice the plants and what they like: rhodos and azaleas like acidic soil while lilac likes sweeter soil. Look around your property (if this applies) and see what else in this list is thriving and, possibly, what is fading and notice their pH number.