Avocado 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 Avocado (Persea americana), 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.
The avocado, alligator pear or avocado pear is an evergreen tree in the laurel family (Lauraceae). It is native to the Americas, with archaeological evidence of early human avocado use dating back thousands of years across various regions of Central and South America. Wikipedia, CC BY-SA 4.0
Native range: C. Mexico to Costa Rica (seasonally dry tropical). Also sold as aguacate, alligator pear, avocado pear, midshipman's butter, palta and vegetable marrow.
What Avocado’s sources say that bears on this
- Soil moisture
- Moist but well-drained or Well-drainedRHS · read 13 September 2026
- Light
- Full sun, Partial shadeRHS · read 13 September 2026
- Soil
- Loam; pH NeutralRHS · read 13 September 2026
- Watering
- Avocado can also be kept as a houseplant, particularly where the climate is less suitable, starting from a seed that has sprouted in water or one sown straight into soil. Its seeds sprout fast and easily, with or without toothpicks crossed over a glass of water to hold them.NC State Extension · read 13 September 2026
- Feeding
- Once the seed cracks and roots show (2 to 6 weeks), move it into a pot of potting soil in a sunny window and feed regularly through spring and summer.NC State Extension · read 13 September 2026Every 2-3 weeks, give a balanced liquid feed.RHS · read 13 September 2026
How this shows up on a Avocado
Yellowing that begins at the leaves deepest inside the canopy
On a avocado the yellowing climbs from below. Affected leaves feel limp rather than papery, and water sits in the saucer long after it drains through.
Its source describes soil that is moist but well-drained or well-drained. Roots held below that are short of air, and roots short of air stop moving water, so the canopy wilts in a wet pot.
Telling it apart: Whether new growth is affected too. Root damage shows up everywhere at once; ordinary leaf loss shows only in the oldest leaves.
RHS · read 13 September 2026Possible causes, likeliest first for a Avocado
Most likely too much water
Ranked higher because Avocado's recorded problems point this way.
- Moist but well-drained or Well-drained RHS · read 13 September 2026
- Loam; pH Neutral RHS · read 13 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 avocado 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 too little water
- Moist but well-drained or Well-drained RHS · read 13 September 2026
Why: Soil dry two inches down, under lower leaves that are yellowing or leaves that are falling, is a avocado 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.
Most likely not enough light
- Full sun, Partial shade RHS · read 13 September 2026
Why: Far from a bright window, a avocado builds leaves it cannot afford.
What to try:
- Move it closer to the brightest window you have, over a week or two rather than in one step.Useful: grow light
- Water less while it is in low light; a avocado that is barely growing uses little.
What would settle it: Compare a new leaf with one from last year. Smaller and paler, with a longer gap below it, is the reaching pattern rather than a nutrient one.
Less likely for a Avocado, still possible
- Most likely short of nutrients
- Most likely a build-up of salts in the soil
- Most likely cold
- 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
- 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
- Possibly too much direct sun
- Possibly too much direct sun, or feeding
Questions
- What usually causes yellowing leaves on a Avocado?
- For Avocado: most likely too much water, most likely too little water and most likely not enough light.
- How can I tell which one it is on my Avocado?
- 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 Avocado's sources say about its soil moisture?
- RHS: Moist but well-drained or Well-drained.
- What does this look like on a Avocado?
- On a avocado the yellowing climbs from below. Affected leaves feel limp rather than papery, and water sits in the saucer long after it drains through. Telling it apart: Whether new growth is affected too. Root damage shows up everywhere at once; ordinary leaf loss shows only in the oldest leaves.
Other plants that show yellowing leaves
Chinese banyanFaded, yellow-white areas on the sunny side of the canopy
Coffee plantPale dry areas across the upper leaves only
Common figThe leaves deepest inside the canopy turn yellow and hang
Crape myrtlePale dry areas across the upper leaves only
Japanese mapleYellowing that begins at the leaves deepest inside the canopy
LemonSoft yellow leaves low on the plant, soil still wet
Something else wrong with the Avocado?
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.