I’ve been getting lots of questions about yellowing grass, especially in St. Augustine lawns. I’m not surprised, considering how hot and dry it’s been. It’s yellowing that some refer to as chartreuse or a faded-out green.
Unfortunately, there is not a one-size-fits-all solution to yellowing grass in July and August. It could be caused by a number of things, but let’s hope it’s just one of a couple that are easy to fix.
It’s likely one of the following:
- Your irrigation is supplying too much chloramine.
- You didn’t do your summer fertilization.
- You have early-onset gray leaf spot. (See right)
- It’s early-onset of take all patch.
- You have nutrient lock-up.
- You have iron chlorosis (iron deficiency).