Check these first
- Go out at night with a flashlight to see what is feeding.
- Look for silvery slime trails on the leaves or soil.
- Check under the leaves and in the mulch for hiding pests.
Likely causes
Slugs
Most likelyHow to tell: You will see irregular holes in the leaves and shiny slime trails on the soil or foliage. They often target young, tender growth in early spring.
What to do: Hand pick the slugs off the plant at night using a flashlight. You can also place shallow dishes of beer near the base of the plant to trap them. Use iron phosphate slug bait around the perimeter if the infestation is heavy.
Snails
PossibleHow to tell: Similar to slugs, snails leave behind ragged holes and slime trails. You might find them hiding under the leaves or in the mulch during the day.
What to do: Clear away mulch or debris near the base of the plant where they hide. Hand pick them off during the evening hours. Use copper tape around the base of the plant to deter them from climbing up.
Find out what's wrong with your jack-in-the-pulpit
The list above covers the usual causes. Pocket Botanist looks at a photo of your actual plant and tells you the likely cause, how serious it is, and what to try first. Identification and a health check are free.
Scan with your phone's camera to get the app
Or go to pocketbotanist.app/get on your phone
When to worry
Worry if the plant is being defoliated so quickly that it cannot photosynthesize. Minor nibbling is common and rarely fatal to an established plant.
Stopping it coming back
Maintain a tidy garden bed and remove hiding spots like piles of leaves or wood near your plants.
Jack-in-the-pulpit: pests? Check yours with a photo
Every plant is a little different. Take a photo of your jack-in-the-pulpit and Pocket Botanist tells you which cause is most likely, how serious it is, and what to try first. A few checks a day are free. Save the plant and you get care reminders timed for it.
Scan with your phone's camera to get the app
Or go to pocketbotanist.app/get on your phone
Get the app · Or check it from a photo now, free
Questions people ask
- Can I use salt to kill the slugs?
- No, salt will damage your soil and harm your plant. Stick to physical barriers or safe baits.
- Do I need to spray chemicals?
- Usually not. Physical removal and simple traps are very effective for this plant.
Guides to these causes
More problems with Jack-in-the-pulpit
- Why are there spots on my Jack-in-the-pulpit leaves?
- Why is my Jack in the pulpit losing its leaves?
- How do I fix root rot in my Jack in the pulpit?
- Why is my Jack-in-the-pulpit drooping?
- Why are my Jack in the pulpit's leaves turning yellow?
- Why are my Jack in the pulpit leaves getting brown tips?
- Why is my Jack in the pulpit not flowering?
Back to the Jack-in-the-pulpit guide
This article was generated with AI on from the plant’s care profile and is general information, not horticultural advice. Read about how we build these guides.

