Reads the spot, not the room.

Plant placement, spot by spot

Plants don’t live in rooms. They live in spots. These guides sort out what actually grows where: by window, by spot, by light situation, plus how to read the light at any spot yourself.

Start here

By window direction

North, south, east and west, and what each one actually gives you.4

By plant and window

One plant, one window, one answer, with the distance that decides it.21
By plant

Snake plant in a west window

Ideal, lethal, or ten feet back? The answer is a distance.

By plant

Monstera in a north window

Best window or nowhere near enough? Both, one metre apart.

By plant

Pothos in an east window

Everyone agrees it works. Nobody says how far it reaches.

By plant

Monstera in an east window

Seven feet: thriving, or far too far? One of them is wrong.

By plant

Fiddle leaf fig in a south window

The scorch warnings point at the wrong end of the room.

By plant

Philodendron in a south window

Four guides, four distances. Ours is three metres.

By plant

Peace lily in a south window

“Avoid south windows” is useless if south is all you have.

By plant

Spider plant in a west window

The argument is about light. Heat is the actual limit.

By plant

ZZ plant in a north window

A full score on the sill, and no, not in a closet.

By plant

Rubber plant in an east window

Every guide says “near.” It has to mean near.

By plant

Prayer plant in an east window

Nine guides about the window. None about the air.

By plant

Orchid in a south window

One society says best window. The summary says never. Both, two metres apart.

By plant

Monstera in a south window

The advice is a range. The data is a step, drawn at the glass.

By plant

Snake plant in a south window

Every distance anyone recommends is short of the one that scores.

By plant

Peace lily in a west window

Three to five feet is the number everyone gives. It is a metre short.

By plant

Jade plant in a north window

The sill and the far wall are one point apart. There is no spot.

By plant

Jade plant in a south window

Yes, and three metres in you are back at a north window.

By plant

Rubber plant in a west window

Three claims about this window. One of them aims the wrong way.

By plant

Golden pothos in a west window

Four contradictory answers, and every one of them works.

By plant

Fiddle leaf fig in a north window

Identical light to the monstera page. Opposite verdict.

By plant

Parlor palm in an east window

The spot everyone recommends is the one that gets flagged.

By spot

The rooms people ask about most.9

By timing

Not where the plant goes, but when to do the thing: water, repot, feed, bring it in.6

By light situation

When you know what the light is like but not what will live in it.5

Measure your light

How to read a spot, what the numbers mean, and why the published ones disagree.26
Interactive

How many lux do plants need?

Type your reading, get the tier it lands in and the plants that live there.

Interactive

Which way does my window face?

One question about where the sun lands answers it. No compass needed.

Method

How to measure light for plants

Your eyes can’t judge it; your phone can. In ten seconds.

Method

How far from a window can a plant live?

Light doesn’t fade. It falls off a cliff. Where the edge is.

Method

The shadow test (no app)

Hold your hand over the spot. The shadow tells you the tier.

Method

Are light meter apps accurate?

Our two rounds scored 65 and 93 for the same plant. Where that matters.

Method

Why iPhone light meter apps disagree

No app can read the iPhone’s light sensor. They read the camera.

Pet safety

Cat-safe plants for low light

Six of the popular low-light picks are on the ASPCA toxic list.

Pet safety

Cat-safe hanging plants

The default hanging trio is toxic, and the hook moves the score from 94 to 66.

Species

How much light a snake plant needs

In lux. Its best spots are not the sill, and not the dark corner.

Species

How much light a jade plant needs

In lux. Nine indoor spots, and not one of them clears the bar.

Species

How much light a monstera needs

In lux. The published range is right, and about a quarter of the answer.

Temperature

Minimum temperature, by plant

Six sources, eleven degrees apart. The plants are only six.

Humidity

Ideal humidity, by plant

A jade and a prayer plant share no comfortable level at all.

Humidity

Plants for dry air

At 30%, six of the eleven list regulars are outside their own band.

Airflow

Plants that tolerate cold drafts

The four usual names are identical on the air and nine degrees apart on the cold.

Airflow

Do plants need air circulation?

Not one species in our care data prefers still air. Most don’t want a fan either.

Temperature

Plants near a radiator

The heat costs nothing until 30 °C. The dry air is what takes the peace lily out.

Measuring

Bright indirect light, in foot-candles

Published bands run from 90 to 2,000 fc, and the two extremes do not overlap.

Diagnose

Leggy houseplants

The stretch is a light reading. Here is how much closer to move it.

Diagnose

Why plants die in winter

Four things change at once, and nobody moved the pot.

Diagnose

Why a plant leans to one side

The lean is a direction reading. Rotating changes the shape, not the spot.

Diagnose

Alive, but not growing

Every list gives ten causes. One of them answers to a measurement.

Diagnose

Monstera leaves not splitting

Three real causes. And the only one you can settle today.

Troubleshoot

Why your plant is dying in a bright room

“Bright room” describes the window, not your plant’s shelf.

The evidence

How bright is the middle of a room?

Six spots, one room: 20,000 lux to 18. The data essay.

Older guides

Kept for reference. Thinner than the rest, and not where we are putting the work.1

Find the right spot.

Free to start. Honest all the way through.

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