Parsleyworms
Parsleyworms: Friend or Foe in the Garden?
Parsleyworms are large, colorful caterpillars that can grow up to two inches long. They are bright green with black bands and small yellow spots across each segment, making them easy to recognize. When startled, parsleyworms display an interesting defense by releasing a strong odor and extending small orange horn-like structures called osmeteria to deter predators.
These caterpillars feed aggressively on parsley, fennel, dill, and other plants in the carrot family. Their feeding habits can quickly strip plants of foliage, sometimes leaving only bare stems behind. While this damage can be frustrating for gardeners growing herbs for harvest, parsleyworms play an important role in the garden ecosystem.
Parsleyworms eventually transform into the beautiful black swallowtail butterfly, an important pollinator that supports healthy gardens and natural habitats. Because of this, many gardeners choose to relocate parsleyworms instead of destroying them.
If you want to protect your herbs while preserving these beneficial insects, try gently moving parsleyworms to other host plants you may have available. Suitable options include dill, carrot tops, parsnips, fennel, or even wild plants like Queen Anne’s lace. By sharing a few plants, you can support pollinators while still enjoying a productive herb garden.