How many lux does a monstera need?

In our scoring it takes a full hundred anywhere from roughly 2,800 lux to about 10,000. That band covers most of a normal home, which is why so much of the published advice is technically correct and still unhelpful.

Can a monstera get too much light indoors?

Pressed against south glass at around 13,000 lux it comes back flagged as bright rather than ideal. One metre back from the same window scores a full hundred, so the fix is a metre rather than a different room.

How far from a window can a monstera go?

It depends on the window. A metre in from a north window still scores a full hundred, two metres reads as getting dim, and a corner four metres from any window is not enough. From an east or west window it holds much further back.

Is bright indirect light enough for a monstera?

Usually yes, and that phrase is the problem rather than the answer. Bright indirect describes a north sill at 3,640 lux and also a spot two metres into the same room at 1,764, and only one of those scores a full hundred.

Why is my variegated monstera turning green?

The white sectors of a variegated monstera hold no chlorophyll, so the same light feeds it less than it feeds an all-green plant. In a dim spot the plant responds by pushing out greener growth, and reverted shoots outgrow the patterned ones. The lever you control is the one this page measures: keep it at the bright end of the band above. When the cause is the mutation itself being unstable, more light will not reverse it; pruning reverted stems is how growers keep the pattern.

How Much Light a Monstera Needs, in Lux

Ask this question and the answers arrive in different units:

Six to twelve hours a day. Hours, with no intensity attached.
Five to eight hours of dappled light. Fewer hours, plus an adjective.
Twelve to sixteen hours under a lamp. Hours again, measured against hardware you would have to buy first.
As much bright indirect light as the plant can possibly get. A direction with no end to it.
5,000 to 7,000 lux for a young plant. The only one you can hold up against a particular spot.

Near the top of the results sits a post from someone who has read all of these, titled with the complaint that the answers keep conflicting, and the first reply predicts it will collect more of the same. The lux figure is the one worth testing, because a number can be wrong in a way that hours and adjectives cannot.

Worked example: Swiss cheese plant (Monstera) right against the glass of a south window, the one spot in the table that is too bright, air 22.5 °C and 50% humidity, medium airflow. Your spot will score differently. Run it for your own spot →

Ten spots, scored

Before our own scoring says anything: we gathered every published figure we could find for a monstera. 9 of them, from 5 separate sources, in 3 different units. They are reproduced below exactly as each source writes them, and nothing here is converted.

Who publishes it	What it says a monstera needs	What the figure is
theplantrunner.com	800–2,000+ lux	Standard foliage plants (pothos, Philodendron, Monstera deliciosa …) — a general band, not a single-species figure
theplantrunner.com	1,500–5,000 lux	Light-hungry aroids & Ficus divas (Fiddle Leaf Fig, variegated Monstera)
growlightmeter.com	8 – 12 PPFD / DLI	Monstera
houseplantjournal.com	100 FC (20 µmol) foot-candles	minimum indirect light level
houseplantjournal.com	200 FC (40 µmol) foot-candles	good indirect light level
houseplantsnook.com	50–100 foot-candles	chart fc level
houseplantsnook.com	200–400 foot-candles	chart fc level
soltech.com	around 288–325 PPFD / DLI	Monstera FAQ — large / extra-large plant PPFD
soltech.com	80–500 PPFD / DLI	Monstera — Photone's published PPFD range, cited by Soltech

The published figures we collected for a monstera, one row per figure, in the unit each one uses. They came out of a corpus of 433 light figures gathered from 34 sources across ten separate populations, and they were not selected for agreement. 9 figures transcribed from 5 sources, read end to end on 29 August 2026. Units are copied exactly as each source writes them; nothing here is converted, and nothing here is our own measurement. All of them, from every page, are one free download.

A monstera in a terracotta pot on a windowsill, the city outside blown out white by the light coming through the glass — On the sill, which for this species is above what it asks for. The question is how far back that stops being true.

These are our estimates for indoor spots on a clear day, scored by the same engine that runs in the free spot checker, with temperature, humidity and airflow set to the plant's own preferences so that the only thing changing between rows is light.

Every row, one plant each (10)

Spot	Estimated light	What the light is doing	Verdict
South sill, against the glass	13,000 lux	A bit bright, but workable	Worth a try, 67/100
1 m in from a south window	10,000 lux	Just the right amount of light	Great fit, 99/100
West sill	7,800 lux	Just the right amount of light	Great fit, 100/100
East sill	6,500 lux	Just the right amount of light	Great fit, 100/100
1 m in from an east window	5,000 lux	Just the right amount of light	Great fit, 100/100
North sill	3,640 lux	Just the right amount of light	Great fit, 100/100
1 m in from a north window	2,800 lux	Just the right amount of light	Great fit, 99/100
2 m in from a north window	1,764 lux	A little dim, but workable	Worth a try, 68/100
3 m in from a north window	1,111 lux	A little dim, but workable	Worth a try, 65/100
A corner 4 m from any window	125 lux	Too dim here	Not the best fit right now, 45/100

Ten indoor spots at typical clear-day conditions, scored for the same monstera. The spot is what moves here. What does not: the same plant, the same home on the same clear day, with 22.5 °C, 50% humidity and medium airflow on every row. The middle column is only what the light is doing. The verdict is the whole spot, so a plant can have the light it wants and still lose points on warmth, humidity or airflow.

The published range is correct and too narrow to use

Take the 5,000 to 7,000 lux figure to the table. Both ends land on a full hundred, so nothing about it is wrong. But the light reads as just right from 2,800 lux and stays that way past 10,000, which means the published range describes roughly a quarter of the band where this plant is comfortable.

Both the published range and our band are lux figures about rooms that nobody in the argument has measured, which is why we also publish 204 readings taken at real spots: indoors their middle half runs 420 to 6,200 lux, wide enough to hold most of the disagreement.

That matters because of what a narrow range makes you do. A reader who takes 5,000 to 7,000 as the requirement will look at a north sill reading 3,640 and conclude it falls short. It does not. It scores a full hundred, the same as the east sill nearly twice as bright. Told the wider truth, that reader keeps a perfectly good spot instead of buying a lamp for it.

Where it actually stops, at both ends

A monstera on a moss pole reaching one leaf toward a window, snow and bare trees outside — The same plant at the other end of the year, and on this species the winter costs it less than the metres do.

The flagged rows at either end are the content of this page, because everything between them is the same answer.

Too bright: pressed against south glass at 13,000 lux, the light reads as bright rather than ideal. Not dangerous, and not a reason to move the plant to another room. One metre back from that same window is a great fit at 99, so the correction is a metre.

Too dim: a north window holds full marks to about a metre in, then drops to flagged at two metres and stays there. A corner four metres from any window is not enough at all. The dim edge sits at a different distance for every orientation, which is easiest to see by standing in one place and changing the wall the window is in:

The window it is three metres from	Estimated light	Verdict
North window	1,111 lux	Worth a try, 65/100
East window	1,984 lux	Worth a try, 69/100
West window	2,381 lux	Great fit, 99/100
South window	3,969 lux	Great fit, 100/100

One position, four different walls to put the window in. Three metres into the room is a different proposition depending on which one it is. The spot is what moves here. What does not: the same plant, three metres back from the glass, with 22.5 °C, 50% humidity and medium airflow on every row.

Three metres is flagged as dim from a north or an east window and comfortable from a west or a south one. That is the same shape our monstera in a north window page finds from the other direction, and the south-window page covers the bright edge in more detail.

The number is not the answer, and here is the proof

A south sill at 13,000 lux scores 67 for a monstera. On our jade plant page the identical spot, at the identical reading, also scores 67. The pothos page refuses the same sill at 45, and the fiddle leaf fig page gives it 100.

The two verdicts have nothing in common. The monstera is flagged because the light is on the bright side of what it wants. The jade is flagged because the light is on the dim side of what it wants. Same window, same lux, same score out of a hundred, opposite problems, and opposite fixes: move the monstera back a metre, move the jade outdoors.

That is the case against reading light figures on their own. A reading describes a place. Whether the place works is a question about the pairing, and there is no lux value you can memorise that answers it for every plant you own.

A monstera scored 66 out of 100 in the GrowSpot app and called Worth a try, with light, temperature, humidity and airflow each marked on its own scale — The same wording as the table above, because it is the same scoring. The four separate scales are why two spots can share a number and mean opposite things: only one of the four is the light.

The advice to summer it outside

It circulates every year and it is aimed at the wrong plant. Take the same south exposure with and without the glass: at the window, 13,000 lux and a score of 67; on a balcony at 45,000 and outdoors at 80,000, 42 both times.

The window is doing useful work here rather than getting in the way. This plant evolved under a canopy, and an unshaded balcony hands it several times more light than its band tops out at, which is the reverse of the situation a jade is in.

What to do with a spot you already have

The practical version: if your monstera is anywhere between a north sill and a metre back from a south window, light is not your problem, and whatever is bothering the plant is something else. If it sits against south glass, pull it back an arm's length. If it is more than a metre into a north room, it is on the dim side, and the symptom to watch for is the one on our page about fenestration, where new leaves come in without holes.

If you would rather check the exact place the pot sits, the free spot checker reads it in your browser, and you can lay the phone down where the plant would go.

By GrowSpot · Published August 12, 2026 · Last updated August 30, 2026

Plant photo credits