Pocket BotanistPothos (Epipremnum aureum, sometimes called devil's ivy or golden pothos) is one of the most popular houseplants for a reason: it grows almost anywhere and tolerates almost any treatment. When yellow leaves appear, it is the plant telling you that one of its basic needs is off. The good news is the list of likely causes is short.
1. Overwatering (the usual suspect)
Roughly two-thirds of yellowing pothos cases are overwatering. The pattern: lower leaves yellow first, often whole-leaf rather than tip-first; the soil feels wet several days after watering; the plant looks limp despite being damp.
What to do: stop watering. Let the soil dry out almost completely (top 2 to 3 inches dry to the touch). If the plant does not perk up within a week or two, slide the pot off and inspect the roots. Healthy pothos roots are white to pale tan and firm. Mushy, brown, or smelly roots are rotting. Trim affected roots with clean scissors, dust the cuts with cinnamon or rooting hormone, and repot in fresh soil.
2. Underwatering
The opposite pattern: leaves go limp first, then turn pale yellow with crispy brown tips. Soil pulls away from the edges of the pot. The whole plant looks droopy.
What to do: water thoroughly until water runs out the drainage holes. If the soil has shrunk away from the pot, water in stages so it has time to absorb (otherwise the water runs straight through). Most plants bounce back within 24 hours.
3. Too much direct sun
Pothos evolved as a tropical understory plant; in the wild it climbs other trees in dappled light. Direct sun, especially through a south-facing window in summer, bleaches the leaves to a pale yellow-green and can cause crispy brown patches.
What to do: move the plant a few feet back from the brightest window, or add a sheer curtain. New growth should come in a healthy green within a few weeks.
4. Not enough light
Pothos tolerates very low light but loses its variegation and slows down dramatically. In near-darkness, lower leaves yellow and drop as the plant pulls resources to the growing tip. Variegated cultivars (Marble Queen, Manjula, Snow Queen) need brighter light than plain green ones to maintain their white patches.
What to do: move closer to a window, or add a small grow light on a timer. A few hours of bright indirect light a day is enough to keep most pothos varieties happy.
5. Nutrient deficiency
Pothos that have lived in the same pot for several years often run low on nitrogen and iron. The pattern is distinctive: yellowing between the leaf veins, with the veins themselves staying green. This is called interveinal chlorosis.
What to do: feed with a balanced liquid houseplant fertilizer at half strength every 4 to 6 weeks during spring and summer. If the plant has been in the same pot for more than two years, repot into fresh mix one size up.
6. Cold air or sudden stress
Pothos hates temperatures below about 12°C (55°F). A draft from an open window in winter, or a quick move from a warm room to a cold porch, can cause widespread yellowing within days. The same goes for sudden moves from low-light spots to bright ones (or the other way around).
What to do: move the plant to a stable warm spot, away from drafts. Affected leaves may not recover; new growth should come in normally once the plant settles.
When yellow is normal
Pothos drop their oldest leaves periodically as part of normal growth. One or two yellow leaves at the bottom of the plant every few months, with healthy new growth at the growing tip, is not a problem. The plant is just shedding leaves it no longer needs.
A safety note
Pothos is toxic to cats, dogs, and humans if chewed, according to the ASPCA. The toxic compound is the same calcium oxalate that Monstera deliciosa carries: it causes oral irritation, drooling, and difficulty swallowing. Keep pothos hanging or out of reach of pets that chew.
Use the diagnosis tool
If you are not sure which of these causes you are looking at, open Pocket Botanist and use the diagnosis feature. Take a photo of the affected leaves and the model returns the most likely cause and the smallest correction to try first. The full app is free on iPhone and Android and you do not need an account to start.
Sources
- ASPCA, "Toxic and Non-Toxic Plants: Devil's Ivy." aspca.org
- Royal Botanic Gardens, Kew, "Plants of the World Online: Epipremnum aureum (Linden & André) G.S.Bunting." powo.science.kew.org