Troubleshooting
Chalk Milkwort problems — and how to fix them
Chalk Milkwort (Polygala calcarea) 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.
Failure to establish or sudden dieback
Almost always caused by soil that is too fertile, acidic, or waterlogged. This is an obligate calcicole — check soil pH before planting and ensure sharp drainage.
Slug and snail damage
Young plants and new growth in spring can be eaten by slugs. Use gritty limestone mulch around the crowns, which deters molluscs and improves drainage simultaneously.
Prevent chalk milkwort problems before they start
Most chalk milkwort issues are care-mismatch, not bad luck. Dial in the basics:
Chalk Milkwort problems — FAQ
Why is my chalk milkwort failure to establish or sudden dieback?
Almost always caused by soil that is too fertile, acidic, or waterlogged. This is an obligate calcicole — check soil pH before planting and ensure sharp drainage.
Why is my chalk milkwort slug and snail damage?
Young plants and new growth in spring can be eaten by slugs. Use gritty limestone mulch around the crowns, which deters molluscs and improves drainage simultaneously.