Bermuda Hates Shade… Period
RULE #1… For Bermuda to grow well, it really needs 8 hours of full sun a day. END OF STORY. I’d love to tell you that some varieties do better than others, but honestly… it LOVES the sun and no one has TRULY created a shade tolerant Bermuda grass.
Again, I said for it to grow WELL.
If you have trees casting shadows on your Bermuda… trim them up VERY high. This is known as lifting the canopy. Keep trimming lower branches and go up HIGH to eliminate as much shade as possible. The next option… cut the tree down. (Sorry)
I have areas that get reduced sunlight and they are ALWAYS weaker. Fertilizer will NOT help the problem. You might see a LITTLE success by allowing shaded areas to grow a little taller, but go back to rule #1… Bermuda hates shade.