Heartleaf philodendron leaves turning yellow: causes and what to do
17 results in the diagnosis tree begin with yellowing leaves, 7 of them marked likely when the answers fit. They are ordered here for Heartleaf philodendron (Philodendron hederaceum), using what its sources say about soil moisture, light, soil, watering and feeding and one problem recorded for it.
Sources last read 14 September 2026.
Philodendron hederaceum, the heartleaf philodendron is a species of flowering plant in the family Araceae, native to Central America and the Caribbean which is common in the houseplant trade. Philodendron hederaceum var. Wikipedia, CC BY-SA 4.0
Native range: Mexico to Trop. America (wet tropical). Also sold as Parlor Ivy, Philodendron, Sweetheart Plant and vilevine.
What Heartleaf philodendron’s sources say that bears on this
- Soil moisture
- Moist but well-drainedRHS · read 11 September 2026
- Light
- Medium lightClemson Extension · read 11 September 2026Partial shadeRHS · read 11 September 2026
- Soil
- Loam; pH Acid or NeutralRHS · read 11 September 2026
- Watering
- Keep the soil a little moist, and water less in winter.NC State Extension · read 13 September 2026In the growing season, let the compost surface get just dry, then water the compost thoroughly. Do not leave plants standing in water, as this can rot the roots. In winter, when growth slows greatly, water less often and pause feeding until spring.RHS · read 13 September 2026
- Feeding
- From April to September, feed monthly with a liquid houseplant fertiliser. In winter, as growth slows greatly, water less often and stop feeding until spring.RHS · read 13 September 2026
How this shows up on a Heartleaf philodendron
The leaves nearest the soil turn yellow and hang
The lowest leaf blades of the heartleaf philodendron go yellow and translucent at the stalk and drop with a light pull, while the compost stays wet.
Kept wetter than the moist but well-drained its source describes, the root tips die back. A plant with fewer working roots cannot drink, which looks from above exactly like one that has not been watered.
Telling it apart: The smell. Healthy compost smells of earth; compost that has been wet too long does not.
RHS · read 11 September 2026Possible causes, likeliest first for a Heartleaf philodendron
Most likely too much water
Ranked higher because Heartleaf philodendron's recorded problems point this way.
- Moist but well-drained RHS · read 11 September 2026
- Loam; pH Acid or Neutral RHS · read 11 September 2026
Why: Soil that is wet two inches down, under leaves that are yellowing from the bottom or falling, points at roots that cannot breathe.
What to try:
- Hold off watering until the top two inches of soil are dry, and check again with a finger rather than by the calendar.Useful: moisture meter
- Empty any water standing in the saucer or the outer pot within half an hour of watering.Useful: pot with drainage holes
What would settle it: Lift the heartleaf philodendron out of its pot. Healthy roots are firm and pale; roots that have been wet too long are brown, soft and smell sour.
Most likely cold
Ranked higher for Heartleaf philodendron because of what its sources say.
Its RHS hardiness rating puts this plant's cold floor at 15°C or above, so a cold windowsill at night is a strong explanation.
- H1A — warmer than 15°C RHS · read 11 September 2026
Why: Soft, dark patches rather than crisp ones are damaged tissue rather than dried tissue.
What to try:
- Move it away from the glass at night, or keep the curtain on the room side of the heartleaf philodendron.
- Leave damaged leaves until new growth appears, then remove the worst of them.
What would settle it: Where the heartleaf philodendron sits at night, and what the glass feels like at that hour. Damage that appeared after one cold night, on the side facing the window, is the pattern.
Most likely too little water
- Moist but well-drained RHS · read 11 September 2026
Why: Soil dry two inches down, under lower leaves that are yellowing or leaves that are falling, is a heartleaf philodendron shedding what it cannot support.
What to try:
- Water until it runs from the drainage hole, then let the pot drain.Useful: pot with drainage holes
- If the water runs straight through a shrunken rootball, stand the pot in water for twenty minutes so the compost can take it up.
What would settle it: Water it thoroughly and look again the same evening. A thirsty plant firms up fast. One that does not has a root problem rather than a water problem.
Less likely for a Heartleaf philodendron, still possible
- Most likely not enough light
- Most likely short of nutrients
- Most likely a build-up of salts in the soil
- Nutrients are an unlikely explanation here
- Possibly root rot, in a pot that has stopped draining
- Probably too much water, but this is not settled
- Probably too much water
- Possibly too much direct sun
- Possibly too much direct sun, or feeding
- This may be ordinary leaf loss
- Light and feeding are both plausible, and this does not separate them
- Possibly dry air
- The answers do not point at one cause
Questions
- What usually causes yellowing leaves on a Heartleaf philodendron?
- For Heartleaf philodendron: most likely too much water, most likely cold and most likely too little water.
- How can I tell which one it is on my Heartleaf philodendron?
- Where is the yellowing? The lowest leaves, working upward; New growth at the top, while older leaves stay green; Between the veins, the veins themselves still green; At the leaf tips and edges, browning as it goes; Patchy, only on the side facing the window.
- What do Heartleaf philodendron's sources say about its soil moisture?
- RHS: Moist but well-drained.
- What does this look like on a Heartleaf philodendron?
- The lowest leaf blades of the heartleaf philodendron go yellow and translucent at the stalk and drop with a light pull, while the compost stays wet. Telling it apart: The smell. Healthy compost smells of earth; compost that has been wet too long does not.
- Is Heartleaf philodendron safe to handle while I check it?
- Its sources list it as toxic to cats, dogs and people. Wash your hands after handling the roots or sap, and keep trimmings away from pets.
Other plants that show yellowing leaves
AlocasiaThe crown yellows from below and the pot stays heavy
Arrowhead plantNew leaf blades arrive smaller and paler than the ones below
Dumb caneLower leaves collapse and yellow within days of a watering
Elephant earThe older part of the crown yellows while the compost stays soaked
- No photograph yetLacy tree philodendronPale, undersized leaf blades at the tips of the stems
MonsteraSoft yellow leaves low on the plant, soil still wet
Something else wrong with the Heartleaf philodendron?
What this does not cover
This page orders a decision tree's results using a plant's sourced care. It has not seen your plant, its pot or its window, and two problems at once are common: that is the usual reason a confident answer turns out wrong. The questions in the diagnosis tool narrow it further than a list can.