Check these first
- Smell the soil for a sour or rotten odor.
- Inspect the roots for a dark, mushy appearance.
- Verify that the pot has functional drainage holes.
Likely causes
Overwatering
Most likelyHow to tell: The soil stays constantly muddy and the base of the stem feels soft or mushy.
What to do: Stop watering immediately and let the top 2 inches of soil dry out completely. If the plant is in a pot without holes, repot it into a container with proper drainage.
Poor drainage
Most likelyHow to tell: Water pools on the surface of the soil for a long time after watering.
What to do: Mix perlite or coarse sand into your potting soil to improve aeration. Ensure the pot has at least one large hole at the bottom.
Find out what's wrong with your siberian rocket
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
If the stems are turning black or mushy at the base, the rot is advanced and the plant may not survive. It is normal for lower leaves to drop occasionally as the plant grows.
Stopping it coming back
Only water when the top inch of soil is dry and never let the plant sit in a saucer of standing water.
Siberian rocket: root rot? Check yours with a photo
Every plant is a little different. Take a photo of your siberian rocket 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 save a plant with root rot?
- You can try by trimming away the black, mushy roots and repotting in fresh, dry soil. If the stem is already mushy, the plant is likely beyond saving.
- How often should I check the soil?
- Check the soil every 3 days to ensure you are not watering too frequently.
More problems with Siberian rocket
- What are these spots on my Siberian rocket?
- Why is my Siberian rocket getting so leggy?
- Why is my Siberian rocket drooping?
- Why are my Siberian rocket leaves turning yellow?
- Why are the tips of my Siberian rocket turning brown?
- Why is my Siberian rocket losing its leaves?
- Why is my Siberian rocket not blooming?
- What are these bugs on my Siberian rocket?
Back to the Siberian rocket 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.

