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Black Mondo Grass · Ophiopogon planiscapus 'Nigrescens'

Why is my Black Mondo Grass turning yellow?

Yellowing leaves on Black Mondo Grass are often a sign of water stress or poor drainage. Check the soil moisture first to see if you are overwatering.

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

Check these first

  1. Feel the soil to see if it is waterlogged.
  2. Check that the pot has proper drainage holes.
  3. Look for signs of root rot like a foul smell.

Likely causes

  1. Overwatering

    Most likely

    How to tell: The leaves turn yellow and the soil feels constantly soggy or swampy.

    What to do: Allow the top inch of soil to dry out completely before watering again. Ensure your pot has drainage holes to let excess water escape.

  2. Nutrient deficiency

    Possible

    How to tell: The leaves turn a pale yellow color uniformly across the plant.

    What to do: Apply a balanced liquid fertilizer diluted to half strength during the growing season. Do not overfeed as this can burn the roots.

Yellow leaves on other plants

Find out what's wrong with your black mondo grass

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

If the yellowing spreads rapidly across the whole plant, it is a sign of a serious issue. A single yellow leaf at the base is often just natural aging.

Stopping it coming back

Only water when the top inch of soil is dry and never let the plant sit in standing water.

Black Mondo Grass: yellow leaves? Check yours with a photo

Every plant is a little different. Take a photo of your black mondo grass 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

Does too much sun cause yellowing?
Yes, while they like bright light, too much intense, direct sun can bleach the leaves. Move the plant to a spot with partial shade.
Should I cut off the yellow leaves?
Yes, removing yellow leaves helps the plant focus its energy on healthy growth. Use clean, sharp shears.

More problems with Black Mondo Grass

Back to the Black Mondo Grass guide

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.