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Spanish dagger · Yucca gloriosa

Why are my Yucca gloriosa leaves turning yellow?

It is less common for a healthy Spanish dagger to have yellow leaves, as they are tough desert plants. This usually happens because the soil is staying too wet for too long, which stresses the roots.

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yellow leaves on a plant
Photo: Trio3D, CC BY-SA 4.0

Check these first

  1. Check the soil moisture by sticking your finger 2 to 3 inches deep.
  2. Inspect the base of the stem for any signs of softness or rot.
  3. Evaluate the amount of direct sunlight the plant receives daily.

Likely causes

  1. Overwatering

    Most likely

    How to tell: The lower leaves turn yellow and feel soft or mushy to the touch. You might also notice the soil stays damp for more than a few days after watering.

    What to do: Stop watering immediately and let the soil dry out completely. If the soil is heavy or holds too much water, repot the plant into a mix with plenty of perlite or sand for better drainage.

  2. Low light

    Possible

    How to tell: The leaves lose their deep green color and start to yellow while the plant looks stretched out. This happens when the plant is kept in a dark corner or away from a sunny window.

    What to do: Move your yucca to a spot that gets at least 6 to 8 hours of direct sun every day. If you cannot provide enough natural light, consider using a high output grow light.

Yellow leaves on other plants

Find out what's wrong with your spanish dagger

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.

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When to worry

Worry if the yellowing spreads rapidly to the upper leaves or if the stem feels squishy. It is normal for the very bottom, oldest leaves to turn yellow and dry up as the plant grows.

Stopping it coming back

Only water your yucca every 14 to 21 days, and always ensure the soil is bone dry before adding more water.

Spanish dagger: yellow leaves? Check yours with a photo

Every plant is a little different. Take a photo of your spanish dagger 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.

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Questions people ask

Should I cut off the yellow leaves?
Yes, you can trim them off with clean, sharp shears once they have turned completely brown and crispy. This helps the plant look tidy.
Can yellow leaves turn green again?
No, once a leaf has turned yellow, it will not return to green. It is best to focus on keeping the new growth healthy.

More problems with Spanish dagger

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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.