ᐅ Yellowing of the Lawn (Investigation of Causes: Lawn Mower, Fertilizer, etc.)

Hello everyone,

My previously very green and dense lawn has developed increasing yellowing over the past week (see pictures).
I would like to hear your opinions on the possible cause. In my view, it could be related to the following points:

1. Lawnmower (however, the blade was recently sharpened)
2. Fertilizer (the last fertilization was two months ago with a 3-month slow-release fertilizer)
3. Lack of water (although we had a lot of rainfall in the last few days)

As you can see, I am not sure what the cause might be and hope you can help.

Best regards,
Jörg

Hello Jörg, I’m experiencing similar issues. In my case, it’s a combination of intense sunlight and dry conditions. It has also been very windy over the past few days, which draws a lot of moisture from the soil.

If it starts at the tips, a dull lawn mower blade can also be the cause.

Of course, first rule out improper watering habits.

Same problem here. My guess is that the grass was cut too short and not with sharp blades. It could also be that the fertilizer wasn’t watered in enough at the time.

Another issue is that at this time of year, the Kentucky bluegrass (or smooth meadow grass) flowers, which makes the lawn look scruffy and unattractive. This is normal, though.

I think you should stay relaxed, and it should look better again in about four weeks. I would recommend watering thoroughly once a week for 1 to 1.5 hours.

This looks like a lack of water rather than dull blades.
Lawn needs about 15-20 liters of water per m2 (approximately 3-4 gallons per square yard) per week during dry periods.

Water shortage would not only turn the tips brown.