Can I fix leggy grass by mowing it shorter?

Mowing too short will stress the plant and make it more vulnerable to disease. Instead, gradually lower your mower height by no more than one third of the blade length at a time.

Does Red fescue naturally grow tall?

Red fescue is a bunching grass that can grow taller than other turf types, but it should still look dense. If it looks stringy, it is likely reaching for more light.

Why is my Red fescue growing so leggy? Causes and fixes

Check these first

Measure the hours of direct sunlight the area receives daily.
Inspect the soil for signs of over fertilization.
Check if the grass is being mowed too high for the species.

Likely causes

Insufficient Sunlight
Most likely
How to tell: The grass blades grow tall, thin, and sparse rather than forming a thick carpet. You will notice the grass stretching toward the light source.
What to do: Prune back overhanging tree branches to allow more direct sunlight to reach the lawn. If the area is permanently shaded, consider overseeding with a shade tolerant grass variety.
Excessive Nitrogen
Possible
How to tell: The grass grows very rapidly in height but lacks structural integrity and flops over. This often happens after applying a high nitrogen fertilizer in the spring.
What to do: Switch to a balanced, slow release fertilizer with a lower nitrogen ratio. Avoid over fertilizing during the peak of the growing season.

Leggy growth in other plants

Find out what's wrong with your red fescue

The list above covers the usual causes. Pocket Botanist looks at a photo of your actual plant and tells you the likely cause, how serious it is, and what to try first. Identification and a health check are free.

When to worry

It is normal for fescue to stretch slightly during very cloudy or rainy weeks. Worry if the grass becomes so thin that weeds begin to take over the bare patches.

Stopping it coming back

Ensure the lawn receives at least 4 to 6 hours of sunlight daily and maintain a consistent mowing schedule.

Red fescue: leggy growth? Check yours with a photo

Every plant is a little different. Take a photo of your red fescue and Pocket Botanist tells you which cause is most likely, how serious it is, and what to try first. A few checks a day are free. Save the plant and you get care reminders timed for it.

Get the app · Or check it from a photo now, free

Questions people ask

Can I fix leggy grass by mowing it shorter?: Mowing too short will stress the plant and make it more vulnerable to disease. Instead, gradually lower your mower height by no more than one third of the blade length at a time.
Does Red fescue naturally grow tall?: Red fescue is a bunching grass that can grow taller than other turf types, but it should still look dense. If it looks stringy, it is likely reaching for more light.

Why is my Red fescue growing so leggy?