Troubleshooting
Geranium maculatum problems — and how to fix them
Geranium maculatum (Geranium maculatum) 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.
Summer dormancy in drought
Foliage yellows and dies back early if soil dries out in summer. Keep moist and mulch; the plant is healthy and re-emerges, but loses its summer presence.
Powdery mildew
White powdery patches on leaves in dry, still late-summer air. Cut affected foliage to the base to encourage fresh, clean regrowth.
Rust
Orange-brown pustules on leaf undersides in humid conditions. Remove and dispose of infected leaves and improve air circulation around the clump.
Floppy, shy flowering in deep shade
Stretched, lax stems and sparse blooms where light is too low. Move to part shade or dappled light for sturdier, free-flowering growth.
Prevent geranium maculatum problems before they start
Most geranium maculatum issues are care-mismatch, not bad luck. Dial in the basics:
Geranium maculatum varieties: common problems
Looking for geranium maculatum in general rather than its problems? Read the full geranium maculatum care guide — light, water, soil and feeding.
Geranium maculatum problems — FAQ
Why is my geranium maculatum summer dormancy in drought?
Foliage yellows and dies back early if soil dries out in summer. Keep moist and mulch; the plant is healthy and re-emerges, but loses its summer presence.
Why is my geranium maculatum powdery mildew?
White powdery patches on leaves in dry, still late-summer air. Cut affected foliage to the base to encourage fresh, clean regrowth.
Why is my geranium maculatum rust?
Orange-brown pustules on leaf undersides in humid conditions. Remove and dispose of infected leaves and improve air circulation around the clump.
Why is my geranium maculatum floppy, shy flowering in deep shade?
Stretched, lax stems and sparse blooms where light is too low. Move to part shade or dappled light for sturdier, free-flowering growth.