Troubleshooting
Three-yoked Sage problems — and how to fix them
Three-yoked Sage (Salvia trijuga) 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 rot from winter wet
Mountain sages are particularly vulnerable to the combination of cold and waterlogged soil; ensure the crown sits above the surrounding soil level and that drainage is rapid, especially through autumn and winter.
Rosemary beetle (Chrysolina americana)
This invasive beetle, now widespread in the UK, targets aromatic-leaved plants in the sage family; adults and larvae should be removed by hand, particularly in late summer through autumn.
Prevent three-yoked sage problems before they start
Most three-yoked sage issues are care-mismatch, not bad luck. Dial in the basics:
Three-yoked Sage problems — FAQ
Why is my three-yoked sage crown rot from winter wet?
Mountain sages are particularly vulnerable to the combination of cold and waterlogged soil; ensure the crown sits above the surrounding soil level and that drainage is rapid, especially through autumn and winter.
Why is my three-yoked sage rosemary beetle (chrysolina americana)?
This invasive beetle, now widespread in the UK, targets aromatic-leaved plants in the sage family; adults and larvae should be removed by hand, particularly in late summer through autumn.