Troubleshooting
Hairy Woodrush problems — and how to fix them
Hairy Woodrush (Luzula pilosa) is generally low-drama, but a few issues come up again and again. Here is what each one looks like, why it happens, and the fix.
Invasive self-seeding
Can colonise adjacent plantings via self-seeded seedlings; remove unwanted seedlings promptly when small or deadhead before seeds ripen to maintain control.
Vine weevil larvae
In container culture, vine weevil grubs may attack the roots, causing sudden plant collapse; apply nematode biological control (Steinernema kraussei) to pots in late summer.
Prevent hairy woodrush problems before they start
Most hairy woodrush issues are care-mismatch, not bad luck. Dial in the basics:
Hairy Woodrush problems — FAQ
Why is my hairy woodrush invasive self-seeding?
Can colonise adjacent plantings via self-seeded seedlings; remove unwanted seedlings promptly when small or deadhead before seeds ripen to maintain control.
Why is my hairy woodrush vine weevil larvae?
In container culture, vine weevil grubs may attack the roots, causing sudden plant collapse; apply nematode biological control (Steinernema kraussei) to pots in late summer.