Troubleshooting
Japanese Solomon's Seal problems — and how to fix them
Japanese Solomon's Seal (Polygonatum falcatum) 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.
Solomon's Seal Sawfly
Phymatocera aterrima larvae strip leaves to the midrib in late spring and early summer. Remove by hand or treat with a pyrethrin-based insecticide at dusk. A single defoliation rarely kills established plants.
Slugs
Young emerging stems are vulnerable to slug damage in spring. Apply iron-phosphate pellets around emerging shoots, or use a grit mulch around the crown.
Drought Stress
This species is fairly drought-tolerant when established but dislikes heat. Wilting and early dormancy indicate insufficient moisture or excessive sun. Mulch generously and ensure a cool, shaded site.
Prevent japanese solomon's seal problems before they start
Most japanese solomon's seal issues are care-mismatch, not bad luck. Dial in the basics:
Japanese Solomon's Seal problems — FAQ
Why is my japanese solomon's seal solomon's seal sawfly?
Phymatocera aterrima larvae strip leaves to the midrib in late spring and early summer. Remove by hand or treat with a pyrethrin-based insecticide at dusk. A single defoliation rarely kills established plants.
Why is my japanese solomon's seal slugs?
Young emerging stems are vulnerable to slug damage in spring. Apply iron-phosphate pellets around emerging shoots, or use a grit mulch around the crown.
Why is my japanese solomon's seal drought stress?
This species is fairly drought-tolerant when established but dislikes heat. Wilting and early dormancy indicate insufficient moisture or excessive sun. Mulch generously and ensure a cool, shaded site.