Troubleshooting
Pyrenean Heron's Bill problems — and how to fix them
Pyrenean Heron's Bill (Erodium manescavii) 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.
Crown rot in wet winters
The most common cause of plant death; soggy soil around the crown in cold weather leads to fungal rot and rapid plant collapse — always plant in sharply drained soil and consider a gravel mulch around the crown in high-rainfall gardens.
Self-seeding
Erodium manescavii can seed prolifically around the garden; deadhead spent flowers before the coiled seed awns mature and disperse to prevent unwanted seedlings in nearby borders.
Vine weevil
Root-feeding larvae are occasionally problematic in container-grown plants; apply nematode biological controls in late summer when soil temperature is above 5 °C.
Prevent pyrenean heron's bill problems before they start
Most pyrenean heron's bill issues are care-mismatch, not bad luck. Dial in the basics:
Pyrenean Heron's Bill problems — FAQ
Why is my pyrenean heron's bill crown rot in wet winters?
The most common cause of plant death; soggy soil around the crown in cold weather leads to fungal rot and rapid plant collapse — always plant in sharply drained soil and consider a gravel mulch around the crown in high-rainfall gardens.
Why is my pyrenean heron's bill self-seeding?
Erodium manescavii can seed prolifically around the garden; deadhead spent flowers before the coiled seed awns mature and disperse to prevent unwanted seedlings in nearby borders.
Why is my pyrenean heron's bill vine weevil?
Root-feeding larvae are occasionally problematic in container-grown plants; apply nematode biological controls in late summer when soil temperature is above 5 °C.