Should I cut off yellow leaves?

Wait until they are completely brown and dry. The bulb pulls energy from the leaves as they fade.

Will my plant die if it turns yellow?

Not if it is just going dormant. It will return next season if you keep the bulb dry.

Why are my Chilean Blue Crocus leaves turning yellow?

Check these first

Check the current season to see if it is time for dormancy.
Feel the soil to see if it is soggy.
Inspect the bulb for firmness.

Likely causes

Natural Dormancy
Most likely
How to tell: The foliage yellows gradually as the weather warms in late spring. This is a normal part of the life cycle.
What to do: Stop watering entirely once the leaves begin to yellow. Allow the foliage to die back completely before removing it.
Overwatering
Possible
How to tell: Leaves turn yellow and mushy while the soil remains wet for too long. This often happens if the drainage is poor.
What to do: Check that your pot has drainage holes. Reduce watering frequency to every 14 days and ensure the soil dries out between waterings.

When to worry

It is only a problem if the leaves yellow during the peak growing season while the soil is dry.

Stopping it coming back

Maintain a strict dry period during the summer months to keep the bulb healthy.

Not sure which one it is? Photograph your chilean blue crocus.

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

Should I cut off yellow leaves?: Wait until they are completely brown and dry. The bulb pulls energy from the leaves as they fade.
Will my plant die if it turns yellow?: Not if it is just going dormant. It will return next season if you keep the bulb dry.