Monstera: lower leaves turning yellow

What it is likely to be on monstera

1. Not enough light

   Candidate 1common on this plant

   ·source

   Sourced guidancemoderate confidence

   • Royal Horticultural Society: Monstera — cultivation

   Checked 2026-08-13

   Shows as stretched growth with long gaps between leaves, small pale new leaves, loss of variegation, leaning hard towards a window, and — in flowering plants — foliage without flowers. It is the commonest reason an indoor plant fails to thrive while appearing to be watered and fed correctly.

   Points towards it

   • · a monstera in dim light drops its lowest leaves to fund the new ones, working steadily up a bare stem
   • · an indoor light problem
   • · the decline usually starts within a month or two of being moved further from a window

   Argues against it

   • · wet compost is the commoner cause of a yellow monstera leaf and needs ruling out before light is blamed
   • · patchy cream and pale sectors on a variegated monstera are the plant's own markings, not yellowing, and they are present from the moment the leaf unfurls

   Check this next

   Look at the newest leaf to open and count its splits. A monstera makes fenestrated leaves only when it has the light to afford them, so a new leaf arriving whole and heart-shaped on a plant whose older leaves are deeply cut is the plant telling you the light has dropped — and that is a far better reading than the colour of the leaf it is shedding at the bottom.

   What to do now

   Move it within a metre or two of a bright window rather than leaving it in the middle of the room, and give it something to climb. A monstera on a moss pole in good light makes progressively larger and more deeply cut leaves; the same plant trailing in low light makes smaller solid ones and drops the bottom of the stem bare.

   ·source

   Sourced guidancemoderate confidence

   • Royal Horticultural Society: Houseplants — light

   Checked 2026-08-13

2. Normal leaf ageing

   May be normalcommon on this plant

   ·source

   Sourced guidancemoderate confidence

   • Royal Horticultural Society: Houseplant problems

   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

   • · exactly one leaf is involved, and it is the oldest one on the plant
   • · the yellowing is confined to the lowest leaf while the crown is unaffected
   • · nothing was done to it, which fits an ordinary process rather than an insult

   Argues against it

   • · several leaves going at once across the plant is not renewal — renewal costs one leaf at a time — this rules it out entirely.

   Check this next

   Check whether a new leaf is on its way up while the old one goes down. A healthy monstera trades one for one: an unfurling spear at the top and a single yellowing leaf at the bottom is a plant paying for growth, and the giveaway is that the count of green leaves stays the same or rises rather than falling.

   What to do now

   Cut the yellow leaf off close to the main stem once it has gone fully soft, and change nothing else about the watering or the position. If a second and third leaf follow within a fortnight while no new growth appears, stop treating it as renewal and look at the compost and the roots instead.

   ·source

   Sourced guidancemoderate confidence

   • Royal Horticultural Society: Houseplant 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 monstera — 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 Monstera profile lists the problems it is prone to.