Troubleshooting
bluejoint reedgrass problems — and how to fix them
bluejoint reedgrass (Calamagrostis canadensis) is generally forgiving once you match its basics, but a few issues come up again and again. Here is what each one looks like, why it happens, and the fix.
Aggressive spreading
In moist, fertile conditions bluejoint spreads vigorously by rhizomes and can become invasive in small gardens; site only where spread is acceptable or install root barriers.
Rust disease
Calamagrostis species are susceptible to rust fungus; in dense stands improve airflow where possible and remove heavily infected foliage.
Summer decline
As a cool-season grass it may look tired in hot, humid summers; keep moisture levels high and it will recover with autumn's cooler temperatures.
Prevent bluejoint reedgrass problems before they start
Most bluejoint reedgrass issues are care-mismatch, not bad luck. Dial in the basics:
Looking for bluejoint reedgrass in general rather than its problems? Read the full bluejoint reedgrass care guide — light, water, soil and feeding.
bluejoint reedgrass problems — FAQ
Why is my bluejoint reedgrass aggressive spreading?
In moist, fertile conditions bluejoint spreads vigorously by rhizomes and can become invasive in small gardens; site only where spread is acceptable or install root barriers.
Why is my bluejoint reedgrass rust disease?
Calamagrostis species are susceptible to rust fungus; in dense stands improve airflow where possible and remove heavily infected foliage.
Why is my bluejoint reedgrass summer decline?
As a cool-season grass it may look tired in hot, humid summers; keep moisture levels high and it will recover with autumn's cooler temperatures.