Troubleshooting
Geranium pratense problems — and how to fix them
Geranium pratense (Geranium pratense) 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.
Floppy stems after flowering
Tall stems often splay once the first flush fades. Shear the whole plant back hard to encourage compact regrowth and a second bloom.
Powdery mildew
Grey-white leaf coating in dry, crowded conditions. Improve airflow, avoid drought stress, and cut back affected foliage.
Vine weevil and sawfly larvae
Notched leaf margins or chewed foliage signal larvae. Remove by hand or use biological controls; cut back to push fresh growth.
Self-seeding
Sets abundant seed and can spread widely. Deadhead before seed ripens if you want to limit volunteers.
Prevent geranium pratense problems before they start
Most geranium pratense issues are care-mismatch, not bad luck. Dial in the basics:
Geranium pratense varieties: common problems
Looking for geranium pratense in general rather than its problems? Read the full geranium pratense care guide — light, water, soil and feeding.
Geranium pratense problems — FAQ
Why is my geranium pratense floppy stems after flowering?
Tall stems often splay once the first flush fades. Shear the whole plant back hard to encourage compact regrowth and a second bloom.
Why is my geranium pratense powdery mildew?
Grey-white leaf coating in dry, crowded conditions. Improve airflow, avoid drought stress, and cut back affected foliage.
Why is my geranium pratense vine weevil and sawfly larvae?
Notched leaf margins or chewed foliage signal larvae. Remove by hand or use biological controls; cut back to push fresh growth.
Why is my geranium pratense self-seeding?
Sets abundant seed and can spread widely. Deadhead before seed ripens if you want to limit volunteers.