Troubleshooting
Harebell problems — and how to fix them
Harebell (Campanula rotundifolia) 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.
Crown and root rot
The leading killer of harebells in cultivation; ensure the crown sits above any compacted layer and amend heavy soils with grit before planting.
Vine weevil grubs
Larvae feed on the slender rhizomes and roots, causing sudden wilting; apply nematode drench (Steinernema kraussei) in late summer to early autumn.
Prevent harebell problems before they start
Most harebell issues are care-mismatch, not bad luck. Dial in the basics:
Harebell problems — FAQ
Why is my harebell crown and root rot?
The leading killer of harebells in cultivation; ensure the crown sits above any compacted layer and amend heavy soils with grit before planting.
Why is my harebell vine weevil grubs?
Larvae feed on the slender rhizomes and roots, causing sudden wilting; apply nematode drench (Steinernema kraussei) in late summer to early autumn.