Pocket Botanist
Check these first
- Measure the hours of direct sun the plant gets.
- Check if nearby plants are shading it.
- Look for signs of new growth at the base.
Likely causes
Insufficient Light
Most likelyHow to tell: The stems are long and thin with large gaps between the leaves.
What to do: Move the plant to a location that receives at least 6 to 8 hours of direct sunlight daily. If it is in a shaded area, it will continue to stretch.
Lack of Pruning
PossibleHow to tell: The plant is tall and sparse after the first flush of flowers.
What to do: Pinch back the growing tips in late spring to encourage bushier growth. You can trim the plant back by one third to promote new stems.
Find out what's wrong with your swamp milkweed
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.
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When to worry
If the stems are so weak they fall over, the plant needs more light immediately. Some height is natural, but it should not be floppy.
Stopping it coming back
Ensure the plant has full sun exposure from the start of the growing season.
Swamp milkweed: leggy growth? Check yours with a photo
Every plant is a little different. Take a photo of your swamp milkweed 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
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Questions people ask
- Can I grow it in partial shade?
- It will survive, but it will likely become leggy and produce fewer flowers.
- Will pinching hurt the flowers?
- Pinching early in the season actually helps the plant produce more stems, which leads to more flowers later.
More problems with Swamp milkweed
- Why is my swamp milkweed drooping?
- What are the bugs on my swamp milkweed?
- Why are my Swamp Milkweed leaves turning yellow?
- Why are my Swamp Milkweed leaf tips turning brown?
- Why is my Swamp Milkweed dropping its leaves?
- Why does my swamp milkweed have spots on its leaves?
- Why is my swamp milkweed not blooming?
- Why are my swamp milkweed leaves curling?
Back to the Swamp milkweed 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.