Can I save a plant with mushy roots?

If you catch it early, you can trim the bad roots and let the plant dry out before repotting. If the rot has reached the main stem, it is usually fatal.

How often should I water to avoid this?

Water every 14 to 30 days during the growing season, but only when the soil is completely dry.

How do I fix root rot on my Boojum tree?

Check these first

Gently pull the plant from its pot to inspect the roots.
Smell the soil for a sour or rotten odor.
Check that your pot has large drainage holes.

Likely causes

Poor Drainage
Most likely
How to tell: The soil stays wet for weeks and the plant base feels soft or squishy.
What to do: Remove the plant from the pot and trim away any black or mushy roots. Replant in a gritty, inorganic soil mix that drains instantly.
Excessive Watering
Most likely
How to tell: The plant shows signs of decline despite being in a sunny spot.
What to do: Wait until the soil is completely bone dry before adding any water. In winter, skip watering entirely.

When to worry

If the trunk itself feels soft or hollow, the rot may have already traveled too far to save the plant. Healthy plants should feel firm and woody.

Stopping it coming back

Use a specialized cactus and succulent soil mix with plenty of pumice or perlite. Always ensure the pot has excellent drainage.

Not sure which one it is? Photograph your boojum tree.

This page lists the usual causes. Pocket Botanist looks at your actual leaf 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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Questions people ask

Can I save a plant with mushy roots?: If you catch it early, you can trim the bad roots and let the plant dry out before repotting. If the rot has reached the main stem, it is usually fatal.
How often should I water to avoid this?: Water every 14 to 30 days during the growing season, but only when the soil is completely dry.