Troubleshooting · Yellow leaves
Leaves turning pale yellow from the tips, the veins, or all at once. Each pattern points to a different cause, from nitrogen to overwatering to pH.
Yellowing leaves are the single most common complaint across every plant category. The pattern of yellowing (which leaves, which parts of each leaf) is what tells you the cause.
Care profile
Likely causes
Each cause below has a quick check you can do in about thirty seconds. Stop as soon as one matches. You’ve found your answer.
The oldest leaves on a healthy plant will always yellow and drop over time. If it's the lowest one or two leaves and the rest of the plant looks fine, there is no problem.
Quick check
Are only the oldest, lowest leaves yellowing while new growth is healthy and green? That's normal.
What to do
Prune off the yellow leaves at the stem and stop worrying.
Soggy soil starves roots of oxygen, which shuts down nitrogen uptake, which turns leaves yellow from the bottom up.
Quick check
Is the soil wet more than an inch down, and are the yellow leaves soft and limp (not crisp)?
What to do
Let the soil dry to the midpoint of the pot before watering again. Reduce watering frequency. Most plants want less water than beginners give them.
A plant running low on nitrogen will turn pale green, then yellow, starting with the oldest leaves, because nitrogen is mobile inside the plant and gets pulled toward new growth.
Quick check
Is the yellowing uniform across the leaf (not just the veins) and affecting older leaves first?
What to do
Apply a balanced liquid fertilizer at half strength. Improvement should be visible in new growth within two weeks.
When soil pH is too high, plants can't absorb iron even if it's present. The classic sign is young leaves yellowing while the veins stay dark green.
Quick check
Are the newest leaves yellow with darker green veins? That's iron chlorosis.
What to do
Apply chelated iron as a foliar spray for a quick fix, then address the pH with an acidifying amendment over the long term.
This page is beginner-friendly general guidance, not professional horticultural, medical, or veterinary advice. For pet-exposure questions, contact the ASPCA Animal Poison Control Center at (888) 426-4435. For persistent plant-health issues, your local university cooperative extension office is the best free expert in the country. See our full disclaimer for details.