Troubleshooting
Prairie June Grass problems — and how to fix them
Prairie June Grass (Koeleria macrantha) is generally low-drama, but a few issues come up again and again. Here is what each one looks like, why it happens, and the fix.
Summer dormancy mistaken for death
Plants brown and appear dead during hot mid-summer periods — this is natural cool-season dormancy; do not remove or overwater, as plants will resume growth in cooler autumn weather.
Leaf streak fungus
In humid conditions, fungal leaf streak diseases (Dreschslera spp.) cause brown streaking on foliage; improve air circulation, avoid overhead irrigation, and remove affected leaves promptly.
Prevent prairie june grass problems before they start
Most prairie june grass issues are care-mismatch, not bad luck. Dial in the basics:
Prairie June Grass problems — FAQ
Why is my prairie june grass summer dormancy mistaken for death?
Plants brown and appear dead during hot mid-summer periods — this is natural cool-season dormancy; do not remove or overwater, as plants will resume growth in cooler autumn weather.
Why is my prairie june grass leaf streak fungus?
In humid conditions, fungal leaf streak diseases (Dreschslera spp.) cause brown streaking on foliage; improve air circulation, avoid overhead irrigation, and remove affected leaves promptly.