Troubleshooting
Fragrant Solomon's Seal problems — and how to fix them
Fragrant Solomon's Seal (Polygonatum odoratum) 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 rapidly defoliate stems in early summer. Check undersides of leaves from late spring. Hand-pick larvae or use a contact organic insecticide. Plants recover fully the following season.
Slug damage on new growth
Emerging shoots in early spring are susceptible to slug feeding. Apply ferric phosphate pellets or set beer traps around emerging crowns. Damage manifests as ragged holes in young leaves and notched shoot tips.
Failure to spread in dry soil
Unlike P. multiflorum, P. odoratum spreads more slowly even in ideal conditions. In dry, compacted soils rhizome expansion is negligible. Improve soil with compost, maintain consistent moisture, and divide every 3-4 years to reinvigorate.
Prevent fragrant solomon's seal problems before they start
Most fragrant solomon's seal issues are care-mismatch, not bad luck. Dial in the basics:
Fragrant Solomon's Seal problems — FAQ
Why is my fragrant solomon's seal solomon's seal sawfly (phymatocera aterrima)?
Larvae rapidly defoliate stems in early summer. Check undersides of leaves from late spring. Hand-pick larvae or use a contact organic insecticide. Plants recover fully the following season.
Why is my fragrant solomon's seal slug damage on new growth?
Emerging shoots in early spring are susceptible to slug feeding. Apply ferric phosphate pellets or set beer traps around emerging crowns. Damage manifests as ragged holes in young leaves and notched shoot tips.
Why is my fragrant solomon's seal failure to spread in dry soil?
Unlike P. multiflorum, P. odoratum spreads more slowly even in ideal conditions. In dry, compacted soils rhizome expansion is negligible. Improve soil with compost, maintain consistent moisture, and divide every 3-4 years to reinvigorate.