Pear: lower leaves turning yellow
2 causes GrowingHQ holds specifically for pear, what separates them, and what is safe to do before you are sure.
What you are looking at
The oldest leaves — those nearest the base — losing their green while the growing tip stays healthy. Extremely common on tomatoes and peppers, and one of the least specific signs in growing: at least four unrelated things produce it, and one of them is the plant behaving perfectly normally.
It may be nothing
One of the causes below is a normal process rather than a problem. Read that one first: treating a healthy plant does more harm than leaving an unhealthy one a day longer.
Described view
A pear shoot on the tree in summer showing lime-induced chlorosis: the youngest leaves bright yellow with a fine green net of veins still standing out against them, older leaves further down the shoot progressively greener, and the leaf margins beginning to scorch brown on the worst-affected leaves
What it is likely to be on pear
Normal autumn leaf fall
May be normalvery common on this plantsource
Sourced guidancehigh confidence
- Royal Horticultural Society: Trees and shrubs — seasonal change
Checked 2026-08-13
A deciduous tree, shrub or cane turning yellow through autumn before dropping its leaves. The plant is withdrawing nitrogen and magnesium out of the foliage and storing them in wood for next spring, which is precisely why the leaves go yellow — the green is being taken back. Diagnosing it as a deficiency inverts what is happening, and the feed that follows arrives at the one time of year the plant has no use for it.
Points towards it
- · senescence runs through the entire canopy at once, because it is triggered by day length rather than by anything local to a branch
- · nothing was done to the tree, and it grew normally all season — which is evidence FOR a seasonal process rather than against it
- · it is driven by shortening days and cold nights outdoors
- · old and new wood colour together rather than one ahead of the other
Argues against it
- · one branch or one side yellowing while the rest of the tree stays green is not seasonal — nothing about autumn reaches half a tree — this rules it out entirely.
- · autumn colour takes the veins with the rest of the leaf, so a green vein network held against yellow tissue means something else is going on underneath it
- · a tree that was recently moved or planted has a much better explanation available for a general yellowing
Check this next
Check the date and then check the hedgerow. A fruit tree colouring evenly from September onwards, at the same time as everything else deciduous around it, is doing what it does every year — the yellow is the tree taking its nitrogen and magnesium back out of the leaves and into the wood, which is why a deficiency is the one thing it is NOT evidence for.
What to do now
Do nothing, and specifically do not feed — autumn nitrogen on a woody plant pushes soft growth that will be killed by the first hard frost. If the tree carries scab or leaf spot, rake the fallen leaves up and remove them rather than composting them in place, which is a sanitation job rather than a treatment for the colour.
source
Sourced guidancehigh confidence
- Royal Horticultural Society: Feeding trees and shrubs
Checked 2026-08-13
Lime-induced chlorosis
Candidate 2occasional on this plantsource
Sourced guidancemoderate confidence
- Royal Horticultural Society: Lime-induced chlorosis
- Cornell Fruit Resources — Cornell University, College of Agriculture and Life Sciences: Pear nutrition
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 and manganese are immobile, so shortage leaves a green vein network on yellow tissue
- · the youngest leaves at the shoot tips are affected first, which is the pattern that distinguishes a lock-out from a shortage
- · it follows the pH of the ground the tree is standing in
Argues against it
- · yellowing confined to older leaves is a mobile-nutrient or seasonal pattern, and iron cannot produce it — this rules it out entirely.
- · a whole tree colouring uniformly in autumn is seasonal; chlorosis concentrates in the newest growth at the ends of the shoots
Check this next
Walk to the ends of this year's shoots and compare them with the leaves further back. Pears are more prone to this than apples on chalky ground, and the signature is the youngest leaves at the shoot tips being the yellowest with their veins still picked out in green — the reverse of the pattern you would see in autumn, when the oldest leaves go first and the veins go with them.
What to do now
Test the soil pH before treating anything. Mulch generously with composted bark or well-rotted manure each spring to build organic matter, which holds iron in a form the roots can reach — and treat a sequestered iron feed as a stopgap that buys a season rather than as a cure, because it does not change the pH that caused it.
source
Sourced guidancemoderate confidence
- Royal Horticultural Society: Lime-induced chlorosis
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.
Work through it for your pearOpens 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 pear — 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 Pear profile lists the problems it is prone to.