Troubleshooting
Silver Shamrock problems — and how to fix them
Silver Shamrock (Oxalis adenophylla) 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.
Corm rot
The most common problem; caused by overly wet or poorly drained soil, especially in winter dormancy. Lift and store corms in dry sand if growing in a wet climate.
Vine weevil
Vine weevil larvae feed on corms underground, causing the plant to collapse. Check corms when lifting and treat containers with nematodes (Steinernema kraussei) in autumn.
Prevent silver shamrock problems before they start
Most silver shamrock issues are care-mismatch, not bad luck. Dial in the basics:
Silver Shamrock problems — FAQ
Why is my silver shamrock corm rot?
The most common problem; caused by overly wet or poorly drained soil, especially in winter dormancy. Lift and store corms in dry sand if growing in a wet climate.
Why is my silver shamrock vine weevil?
Vine weevil larvae feed on corms underground, causing the plant to collapse. Check corms when lifting and treat containers with nematodes (Steinernema kraussei) in autumn.