Troubleshooting
Golden St. John's Wort problems — and how to fix them
Golden St. John's Wort (Hypericum frondosum) is generally forgiving once you match its basics, but a few issues come up again and again. Here is what each one looks like, why it happens, and the fix.
Root rot in clay or wet soils
Standing water kills roots quickly. Plant on slopes, raised beds, or amend heavy soils with grit. Symptoms include sudden wilting and crown blackening.
Phytophthora dieback
Wet soil combined with warm temperatures can trigger Phytophthora root and collar rot. No chemical cure; prevention via drainage is critical. Remove infected plants.
Deer browsing
Generally deer-resistant but young plants may be browsed. Protect with temporary fencing in deer-pressure areas until established.
Prevent golden st. john's wort problems before they start
Most golden st. john's wort issues are care-mismatch, not bad luck. Dial in the basics:
Golden St. John's Wort problems — FAQ
Why is my golden st. john's wort root rot in clay or wet soils?
Standing water kills roots quickly. Plant on slopes, raised beds, or amend heavy soils with grit. Symptoms include sudden wilting and crown blackening.
Why is my golden st. john's wort phytophthora dieback?
Wet soil combined with warm temperatures can trigger Phytophthora root and collar rot. No chemical cure; prevention via drainage is critical. Remove infected plants.
Why is my golden st. john's wort deer browsing?
Generally deer-resistant but young plants may be browsed. Protect with temporary fencing in deer-pressure areas until established.