Can I save a plant with root rot?

If you catch it early, you can trim away the damaged roots and repot the plant in fresh, dry soil. If the stem is already mushy, it is usually too late.

How often should I water my Arabidopsis?

Check the soil every 2 to 4 days. Only water when the top inch feels slightly dry to the touch.

Thale cress: root rot, causes and fixes

Check these first

Check the soil moisture at the top inch.
Inspect the drainage holes for blockages.
Smell the soil for any signs of decay.

Likely causes

Overwatering
Most likely
How to tell: The leaves may look wilted or yellow even when the soil is wet. You might also notice a musty smell coming from the pot.
What to do: Stop watering immediately and let the top 2 inches of soil dry out completely. If the plant does not perk up, gently remove it from the pot to inspect the roots for mushy or dark sections.
Poor Drainage
Possible
How to tell: The soil remains wet for more than 4 days after watering. The pot might lack holes or the soil mix is too dense.
What to do: Repot the plant into a container with adequate drainage holes. Use a well draining potting mix that allows air to reach the roots.

Root rot in other plants

Find out what's wrong with your thale cress

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.

When to worry

If the base of the stem turns black or mushy, the rot has likely spread too far to save the plant. It is normal for the oldest bottom leaves to fade as the plant matures.

Stopping it coming back

Always wait until the top inch of soil is slightly dry before adding more water. Ensure your pot has plenty of drainage holes to let excess water escape.

Thale cress: root rot? Check yours with a photo

Every plant is a little different. Take a photo of your thale cress 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.

Get the app · Or check it from a photo now, free

Questions people ask

Can I save a plant with root rot?: If you catch it early, you can trim away the damaged roots and repot the plant in fresh, dry soil. If the stem is already mushy, it is usually too late.
How often should I water my Arabidopsis?: Check the soil every 2 to 4 days. Only water when the top inch feels slightly dry to the touch.

Why is my Arabidopsis thaliana showing signs of root rot?