Every plant care guide talks about north, south, east, and west windows as if you already know which is which. Most people do not. Here is how to figure it out quickly, and what each direction means for choosing where to put your plants.
Why window direction matters
The sun moves across the southern half of the sky in the northern hemisphere. That means a south-facing window gets the most sun across the day, and a north-facing window gets the least. A west window gets warm, direct afternoon sun; an east window gets cooler morning sun. The same plant placed in each of those four windows will have a completely different life.
Direction is the starting point. What you place in front of a window, and how far back from the glass the plant sits, also matters. But knowing the direction first gives you the framework.
Method 1: use your phone's compass (fastest)
Every iPhone and Android phone has a built-in compass app. Open it, stand at the window, and point the phone toward the outside (toward the glass). The compass needle shows which direction you are facing. That is the direction the window faces. You do not need to be perfectly still or precisely centered; within about 20 degrees is close enough to know what category of light you are dealing with.
Method 2: watch where the sun appears
If you spend time at home during the day, this one is almost automatic:
- Direct sun through the window in the morning (before noon): east-facing
- Direct sun through the window in the afternoon (after noon): west-facing
- Direct sun through the window for most of the day: south-facing
- Window that never gets direct sun: north-facing
The catch is that this takes a few days to observe, and clouds or trees can make it ambiguous. It works well as a cross-check against the compass reading.
Method 3: check a map
Open Google Maps or Apple Maps. Search for your address and switch to satellite view. Find your building and pick a window. Trace an imaginary line outward from that window and use the compass rose on the map to read the direction. This works for any window in the building and does not require you to be there in person.
What each direction means for your plants
Once you know the direction, here is what to expect from each window:
- South-facingMost light and most direct sun of any window. Great for sun-loving plants, herbs, cacti, succulents, and most fruiting vegetables.
- East-facingGentle morning sun, indirect light in the afternoon. A comfortable middle ground that suits a huge range of houseplants.
- West-facingStrong afternoon and evening sun, which can be intense in summer. Good for plants that like heat and direct light but may stress the most tender ones.
- North-facingSoft, consistent indirect light all day, no direct sun. Best for low-light plants that would scorch in a south or west window.
Let the app do it automatically
Plant Compass Lite reads the sun's position for the exact direction you point your phone and tells you which of your plants will thrive, cope, or should go somewhere else. No compass reading or map needed.
Get Plant Compass LiteWhat about windows that face between directions?
Most windows face somewhere between the four cardinal points. A southeast window gets morning sun and some midday sun, which is generous. A southwest window gets afternoon sun, which can be the strongest sun of the day in summer. A northeast or northwest window is closer to low light than bright. When in doubt, round to whichever cardinal direction is closer: 20 degrees off south is still essentially a south window.
Frequently asked
Does window direction really matter for plants?
Yes, a great deal. A south-facing window can receive six or more hours of direct sun on a clear day. A north-facing window in the same house gets almost none. That difference determines whether a sun-loving plant thrives or slowly fades.
What is the best window direction for houseplants?
South windows get the most total light and suit the widest range of plants. East and west give you direct sun for part of the day. North is best for low-light plants. The right answer depends on the plant, not the window.
Does this work in the southern hemisphere?
The directions flip. In the southern hemisphere a south-facing window is the bright, sunny one. Plant Compass accounts for your hemisphere automatically, so ratings stay correct.
My window faces north but I still see sun through it sometimes. Why?
Near midsummer the sun rises and sets far to the north, so a window near-north can catch a sliver of low angled sun early morning or late evening. It is not the same quality or intensity as midday sun. That window still counts as low light for plant purposes.
Can I just use my phone's built-in compass for this?
Yes. The iPhone Compass app and most Android compass apps are accurate enough for plant placement. Just hold the phone level and point it toward the outside of the window.
Go deeper: best plants for north-facing windows, east-facing windows, south-facing windows, or west-facing windows.