Camellia: lower leaves turning yellow

What it is likely to be on camellia

1. Lime-induced chlorosis

   Candidate 1very common on this plant

   ·source

   Sourced guidancehigh confidence

   • Royal Horticultural Society: Lime-induced chlorosis

   Checked 2026-08-13

   Yellowing between the veins of the YOUNGEST leaves while the veins stay green. The soil usually contains plenty of iron; what is wrong is that the pH is too high for the plant to take it up. Adding iron to the soil without correcting the pH changes nothing.

   Points towards it

   • · iron cannot be moved around the plant, so the yellowing appears between the veins of the YOUNGEST leaves while the veins stay green
   • · on an acid-loving plant this is the tell: iron shortage strikes new growth first, where nitrogen shortage strikes old growth first
   • · it follows the soil, and is far commoner in the ground than in ericaceous compost

   Argues against it

   • · yellowing confined to the oldest leaves points to nitrogen or to normal ageing. Iron is immobile, so a shortage cannot show on old leaves while new ones stay green — this rules it out entirely.

   Check this next

   Look at which leaves are yellow and test the soil pH. Youngest leaves yellow with green veins, on a plant that wants pH 4.5–5.5, is lime-induced chlorosis — and it will keep happening on alkaline soil however much you feed it.

   What to do now

   Test the pH before doing anything else. If it is above about 6, the long-term answer is to grow it in a container of ericaceous compost rather than to keep treating the ground — feeding does not fix a plant that cannot take up what is already there.

   ·source

   Sourced guidancehigh confidence

   • Royal Horticultural Society: Lime-induced chlorosis

   Checked 2026-08-13

2. Normal leaf ageing

   May be normalcommon on this plant

   ·source

   Sourced guidancemoderate confidence

   • Royal Horticultural Society: Camellia — cultivation

   Checked 2026-08-13

   Not a problem, and included as a candidate because it is one of the commonest explanations for a single yellow leaf on an otherwise healthy plant. Every plant sheds its oldest leaves; a differential that cannot return 'nothing is wrong' will always find something to blame.

   Points towards it

   • · the leaves being shed are two or three years old and sit inside the bush, while the new flush on the outside is unaffected
   • · it is confined to the shaded interior of the plant rather than spread across the canopy
   • · nothing changed, which is what you would expect of an annual process

   Argues against it

   • · the newest leaves are the ones yellowing, and a camellia never sheds this year's flush as part of ordinary renewal — that pattern belongs to iron lock-out — this rules it out entirely.
   • · green veins against yellow tissue is a nutrient-availability signature, and an ageing leaf goes yellow all through

   Check this next

   Part the branches and look at where the yellow leaves actually are. A camellia renewing itself yellows old leaves DEEP INSIDE the bush in late spring while the outside is covered in glossy new growth — if the plant is flushing well at the tips, the yellow leaves within are last year's being cashed in, not a deficiency.

   What to do now

   Leave it alone and check again in a fortnight. The leaves will drop of their own accord and the plant will be denser afterwards, not thinner. Resist feeding it: the reflex here is an ericaceous or sequestered-iron feed, and applying one to a camellia that is simply renewing its foliage teaches you nothing about whether the plant needed it.

   ·source

   Sourced guidancemoderate confidence

   • Royal Horticultural Society: Camellia — problems

   Checked 2026-08-13

Narrow it down

This page lists everything at once, which is the right shape for reading and the wrong shape for deciding. The interactive tool asks one question at a time, starting with whichever would separate these causes fastest, and stops as soon as further answers would not help.

Opens with the plant and the symptom already set. Nothing you answer is stored or sent anywhere — the answers live in the address bar and nowhere else.

What this does not cover

These are the causes GrowingHQ holds rules for on camellia — not every cause there is. Where several problems look alike, the honest answer is often that they cannot be told apart by eye, and a page that named one would be guessing. If none of the above fits, the general lower leaves turning yellow page lists causes across all plants, and the Camellia profile lists the problems it is prone to.