Bay Laurel Yellow Leaves: Causes and How to Fix It
Yellowing leaves on a bay laurel almost always trace back to the roots — usually too much water or a pot that won't drain. Here are the likely causes, ranked, with how to tell them apart and fix each one.
Overwatering or poor drainage (the usual culprit)
What's happening
Bay laurel hates wet feet. Sitting in soggy soil, the roots can't get oxygen, begin to rot, and stop moving water and nutrients up to the leaves — which yellow, often starting low on the plant, sometimes with brown soft patches.
How to confirm
Push a finger into the mix: still wet several days after watering? Lift the pot — heavy and waterlogged? Slip the plant out: healthy roots are firm and pale, rotting roots are brown, mushy, and sour-smelling. Check that the drainage holes aren't blocked and the pot isn't standing in a full saucer.
How to fix it
Stop watering and let the mix dry. If roots are mushy, trim the rotten ones with clean snips and repot into fresh, gritty, fast-draining mix in a pot with open drainage holes. Going forward, water only when the top inch is dry and never let the pot sit in standing water.
Prevent it
Use a free-draining mix cut with perlite or grit, a pot with drainage, and the finger test before every watering.
Cold damage or a sudden chill
What's happening
Bay laurel is hardy only to about 20°F. A hard frost, a freezing draft, or a sharp temperature swing can yellow and brown the foliage, sometimes followed by leaf drop, especially on plants left out too late or parked by a cold window.
How to confirm
Yellowing or browning appears after a cold snap, on the side facing a drafty window or door, and often across many leaves at once rather than just the oldest. The plant may have been outdoors past the first frost or next to a single-pane window.
How to fix it
Move the plant to a cool but frost-free, bright spot away from cold drafts. Don't overcorrect by drowning or over-feeding it — just let it stabilize, and trim badly damaged leaves once new spring growth shows it has recovered.
Prevent it
Bring potted plants indoors before the first hard frost and keep them away from icy glass; use frost cloth on borderline nights.
Nutrient shortage
What's happening
Bay laurel is a light feeder, but a plant that's gone years in the same tired mix with no feeding can yellow on its newer leaves and fade to an overall pale, listless green.
How to confirm
Growth is slow and generally pale, newer leaves look washed-out rather than just the oldest, watering and light are fine, and it hasn't been fed or top-dressed in a long time.
How to fix it
Resume a balanced liquid fertilizer at half strength once a month through spring and summer, and top-dress the surface with fresh mix. Don't overdo it — too much feed harms more than it helps this slow grower.
Prevent it
Feed lightly through the growing season and refresh the top inch of mix each spring.
Natural aging
What's happening
An occasional yellow leaf low on an otherwise healthy, growing bay laurel is normal — the evergreen quietly retires its oldest leaves as it pushes new ones.
How to confirm
Just one or two of the oldest, lowest leaves are affected, the rest of the plant looks healthy, and new growth at the tips is green and firm.
How to fix it
Nothing to fix. Pick or snip the spent leaf off if you like — and dry the good ones for the kitchen.
Prevent it
No action needed — this is the plant working normally.
When to worry (and when not to)
A stray yellow lower leaf now and then is completely normal on an evergreen. Worry when many leaves yellow at once, when yellowing climbs to the newer growth, or when it comes with soft brown spots and soggy soil — a sign of root rot that needs action. Caught early, an overwatered bay laurel usually recovers once the roots dry out and can breathe again.