Q.If A Few Of The Leaves On A Plant Turn Yellow All Year What Is It Lacking?
The plant is evergreen and has blue multi flowered flowers in summer
Certified GKH Gardening Expert
Unfortunately, your photos did not come through. I won't be able to see what type of plant it is, and I'm not able to see the conditions around, so there is a lot that we can't rule out. We can test for many of the causes, though. I'd do a soil test first. This will let you know what it is missing, has too much of, or if it has a pH imbalance. That rules out quite a bit of the potential problems. If everything checks out, there, then you can move on to soil moisture and texture. There is a chance that the soil could be too compact, depending on the species of plant. If this is in container, then it could be rootbound, or overwatered/underwatered. Also, depending on the plant, it could be too much/too little light.
Unfortunately, this isn't a straightforward answer. Fortunately, though, you can test for most of the answers.
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/testing-soil.htm
