Can I save a plant with root rot?

If the rot has not reached the main stem, you can save it by trimming the dead roots and repotting. If the stem is mushy, the plant likely cannot be saved.

How often should I water to prevent rot?

Water every 7 to 14 days, but only after checking that the top few inches of soil are dry.

Why does my Globe Thistle have root rot? Causes and fixes

Check these first

Check if the soil feels heavy or waterlogged.
Inspect the drainage holes to ensure they are not blocked.
Smell the soil for a sour or rotten odor.

Likely causes

Poor soil drainage
Most likely
How to tell: The leaves turn yellow or brown and the base of the stem feels mushy. The soil stays wet for more than 2 weeks after watering.
What to do: Stop watering immediately and allow the soil to dry out completely. If the plant is in a pot, repot it into fresh, well draining soil and trim away any black, slimy roots.
Overwatering
Possible
How to tell: The plant shows signs of decline despite regular watering. The roots appear dark and smell unpleasant when examined.
What to do: Adjust your schedule to water only when the top 3 inches of soil are dry. Ensure your container has plenty of holes for excess water to escape.

Find out what's wrong with your globe thistle

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

Worry if the stem base is soft or mushy, as this indicates the rot has spread. It is normal for the plant to lose a few lower leaves as it grows.

Stopping it coming back

Use a gritty, well draining soil mix and never let the plant sit in a saucer of standing water.

Keep your globe thistle healthy from here

Save your plant in Pocket Botanist and you get care reminders timed for this plant, plus a care history that shows what worked. Identification and a health check are free.

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

Questions people ask

Can I save a plant with root rot?: If the rot has not reached the main stem, you can save it by trimming the dead roots and repotting. If the stem is mushy, the plant likely cannot be saved.
How often should I water to prevent rot?: Water every 7 to 14 days, but only after checking that the top few inches of soil are dry.

Why does my Globe Thistle have root rot?