Can I save grass with root rot?

If the damage is localized, you can improve drainage and allow the area to dry out. If the roots are completely black and slimy, you will likely need to reseed that patch.

How do I know if my soil is too compacted?

If you have trouble pushing a screwdriver into the soil, it is likely too compacted. Aeration is the best way to fix this.

Creeping bentgrass: root rot, causes and fixes

Check these first

Dig up a small plug of grass to inspect the roots.
Check for standing water in low areas of the lawn.
Test the soil compaction by pushing a screwdriver into the ground.

Likely causes

Poor Drainage
Most likely
How to tell: The grass feels spongy underfoot and the soil remains muddy hours after watering. The roots will look dark and mushy instead of white and firm.
What to do: Aerate your lawn to improve oxygen flow to the roots. If drainage is severe, you may need to install a French drain or regrade the area. Reduce your watering frequency until the soil dries out slightly.
Overwatering
Possible
How to tell: The grass turns a dull, off color and pulls up easily from the ground. The roots are decaying due to constant water saturation.
What to do: Adjust your irrigation schedule to allow the top half inch of soil to dry out between waterings. Ensure your sprinkler heads are not overlapping too much in low spots.

Root rot in other plants

Find out what's wrong with your creeping bentgrass

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

If you see large patches of grass that pull up like a carpet, the root system has failed. This is a serious condition that requires immediate drainage correction.

Stopping it coming back

Aerate your lawn once a year to prevent compaction and ensure your soil has good drainage.

Creeping bentgrass: root rot? Check yours with a photo

Every plant is a little different. Take a photo of your creeping bentgrass 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 save grass with root rot?: If the damage is localized, you can improve drainage and allow the area to dry out. If the roots are completely black and slimy, you will likely need to reseed that patch.
How do I know if my soil is too compacted?: If you have trouble pushing a screwdriver into the soil, it is likely too compacted. Aeration is the best way to fix this.

Is my creeping bentgrass suffering from root rot?