Why Are My Plant’s Leaves Turning Yellow

Yellow leaves on houseplants can feel like a sign of failure. But don’t worry — this is one of the most common indoor plant problems, and it’s usually easy to fix.

In this guide, we’ll explain why yellow leaves on houseplants happen and how to bring your plants back to vibrant health.

1. Yellow Leaves from Overwatering or Underwatering

Water stress is the #1 cause of yellowing leaves on houseplants. Too much water leads to root rot, while too little causes dehydration. Both disrupt nutrient uptake.

How to fix it:

Stick your finger in the soil. If it’s soggy, hold off watering.
Use pots with drainage holes.
Try bottom watering for consistent moisture control.

💡 Learn more about how to water houseplants properly (The Spruce).

2. Lack of Light Can Cause Yellowing

Without enough sunlight, chlorophyll production drops, and leaves lose their green color.

What to do:

Move your plant closer to a window (east/south-facing is ideal).
Supplement with a grow light if your room is dim.

📍 Related: Light requirements for common indoor plants (Houseplant411).

3. Nutrient Deficiency = Fading Leaves

A shortage of nitrogen or magnesium can result in yellowing, especially when the veins stay green (a sign of chlorosis).

Solution:

Use a balanced liquid houseplant fertilizer monthly (e.g., 10-10-10).
If symptoms persist, test your soil or try a magnesium-rich product like Epsom salts.

4. Yellow Leaves Can Be Natural

Sometimes, old leaves just die off as part of the plant’s growth cycle. If only lower, older leaves turn yellow, your plant may just be renewing itself.

Tip:
Gently prune yellow leaves to redirect energy to new growth. Avoid cutting healthy leaves.

5. Pests or Root Rot May Be to Blame

Spider mites, fungus gnats, or mealybugs can stress your plant. Root rot is another silent killer.

Fix it:

Inspect leaves (especially underneath) and stems weekly.
Wipe pests off with neem oil or insecticidal soap.
If roots are mushy or smell bad, repot in fresh soil.

📍 Related: How to treat common houseplant pests (Gardener’s Supply).