Troubleshooting
Centennial Hops problems — and how to fix them
Centennial Hops (Humulus lupulus 'Centennial') 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.
Downy and powdery mildew
Crowded, humid growth shows yellow spotting, twisted shoots and browning cones. Strip the lower bine, increase spacing and airflow, water at the base, and cut out infected tissue early.
Spider mites and aphids
Hot, dry weather encourages spider mite stippling and dense aphid colonies on leaf undersides. Hose off, foster natural predators, and use insecticidal soap or miticides on serious infestations.
Lodging and tangling
Heavy, fast-growing bines pull down weak supports and tangle into a mat. Provide a robust 4-6 m string or trellis and train the 2-3 best shoots clockwise early in the season.
Sparse first-year cones
A young rhizome invests in establishing roots, so first-year cone yield is light. Expect a marked jump in vigour and harvest from the second and third years onward.
Prevent centennial hops problems before they start
Most centennial hops issues are care-mismatch, not bad luck. Dial in the basics:
Looking for centennial hops in general rather than its problems? Read the full centennial hops care guide — light, water, soil and feeding.
Centennial Hops problems — FAQ
Why is my centennial hops downy and powdery mildew?
Crowded, humid growth shows yellow spotting, twisted shoots and browning cones. Strip the lower bine, increase spacing and airflow, water at the base, and cut out infected tissue early.
Why is my centennial hops spider mites and aphids?
Hot, dry weather encourages spider mite stippling and dense aphid colonies on leaf undersides. Hose off, foster natural predators, and use insecticidal soap or miticides on serious infestations.
Why is my centennial hops lodging and tangling?
Heavy, fast-growing bines pull down weak supports and tangle into a mat. Provide a robust 4-6 m string or trellis and train the 2-3 best shoots clockwise early in the season.
Why is my centennial hops sparse first-year cones?
A young rhizome invests in establishing roots, so first-year cone yield is light. Expect a marked jump in vigour and harvest from the second and third years onward.