At a glance
- Most common cause: Overwatering; check soil moisture first
- Lower/oldest leaves only: Likely natural aging; normal if slow and infrequent
- Multiple leaves at once: Overwatering, root rot, or sudden environmental change
- New growth yellowing: Nutrient deficiency or very low light
- Yellow leaves recover: They do not turn green again; remove them and fix the cause
- Quick check: Wet soil + yellow = overwatering; dry soil + yellow = underwatering or light
Start with the soil
Before diagnosing anything else, check the soil moisture. Push your finger 1 to 2 inches into the soil. The moisture level is the single best indicator for distinguishing the most common causes:
Wet or damp soil with yellow leaves almost always points to overwatering or root rot. Dry soil with yellow leaves suggests underwatering, very low light, or nutrient deficiency. Correct moisture with multiple yellowing leaves may indicate a sudden environmental change or a nutrient issue.
Cause 1: Overwatering (most common)
Signs: Soil feels wet or damp. The pot feels heavy. Multiple leaves yellowing, often across different parts of the plant simultaneously. Soft or mushy stem base. Possibly fungus gnats flying around the soil. A sour smell from the pot.
Why it happens: Consistently wet soil suffocates roots, which begin to rot. Rotted roots cannot deliver nutrients or water to leaves, which yellow and drop. The cycle accelerates as more roots die and less of the plant can be supported.
What to do: Stop watering immediately. Let the soil dry out significantly before watering again. Check roots for rot: if the roots are brown and mushy, trim the rotted portions, repot in fresh dry soil, and adjust watering frequency. Going forward, only water when the top 2 inches of soil are dry to the touch.
Cause 2: Natural aging of oldest leaves
Signs: Only the oldest leaves (at the lowest point of each vine, furthest from the growing tip) are yellowing. The rate is slow: one or two leaves per month per vine at most. New growth at the vine tips is healthy and green.
Why it happens: As pothos vines grow, the oldest leaves at the base naturally age out. The plant reallocates nutrients from old leaves to support new growth. This is normal and not a sign of a problem.
What to do: Nothing, unless the rate is rapid. Remove yellowed leaves to keep the plant tidy. If the rate of aging seems excessive (many leaves yellowing quickly across all parts of the plant), look for an additional cause.
Cause 3: Too little light
Signs: Yellowing leaves combined with slow growth and increasingly long, bare vines with few leaves (legginess). The plant is in a dark corner or far from any window. New leaves are small and pale.
Why it happens: Chlorophyll requires light to be produced and maintained. In very low light, the plant cannot produce enough chlorophyll to keep leaves green and will sacrifice older leaves to support what little photosynthesis is possible.
What to do: Move the plant closer to a window with bright indirect light. Pothos tolerates low light but thrives and produces its best color in medium to bright indirect light. Results take several weeks: new growth will be noticeably greener and denser, but existing yellow leaves will not recover.
Cause 4: Underwatering
Signs: Dry soil well below the surface. The pot feels light. Leaves may also be slightly wilted or limp. Yellowing typically starts at the tips or edges rather than spreading across the whole leaf.
Why it happens: Severely drought-stressed plants drop leaves to reduce water demand. Before dropping, leaves yellow. Unlike overwatering yellowing which tends to affect multiple leaves uniformly, underwatering often affects leaves at the tip of a wilting vine.
What to do: Water thoroughly, ensuring water runs from the drainage hole. If the soil has become very dry and hydrophobic (water runs off the surface rather than absorbing), bottom-water for 20 to 30 minutes to rehydrate from below. Adjust the watering interval to prevent the soil from completely drying out for extended periods.
Cause 5: Nutrient deficiency
Signs: Yellowing particularly in new or mid-vine growth rather than just the oldest leaves. The yellowing may have a specific pattern: interveinal chlorosis (yellow between leaf veins with veins remaining green) suggests magnesium or iron deficiency. Overall pale, washed-out new growth suggests nitrogen deficiency.
When it happens: Plants in the same potting mix for more than a year or two have depleted the available nutrients. Plants that are heavily watered can have nutrients leached from the soil over time.
What to do: Feed with a balanced liquid fertilizer (such as a 20-20-20 or similar) monthly during spring and summer. If the plant has been in the same soil for more than 2 years, consider repotting in fresh potting mix, which will replenish nutrients. Do not fertilize in autumn or winter when growth is slow.
Cause 6: Root rot (advanced overwatering)
If overwatering has gone on long enough to cause significant root rot, yellowing will be rapid and widespread and will not slow down even if you stop watering. The plant may also drop leaves. At this stage, inspect the roots directly by removing the plant from its pot. Treat root rot by trimming dead roots and repotting in fresh dry mix.