How do you find the right light for a houseplant?
In short
Match the plant’s requirements to the light at its actual position. A room can feel bright while a shelf receives little daylight. Check the spot at different times, note direct sun, and compare what changes before moving the plant or adjusting care.
In this guide
Choose for the available conditions
Maryland Extension recommends choosing a plant that fits the indoor conditions rather than assuming every room suits every species. Tolerating low light is different from growing strongly there. Start with the species requirements, then assess the window, shelf, or corner you want to use.
Source: University of Maryland Extension: Selecting indoor plants
Look at the leaf position throughout the day
The RHS notes that light changes through the day and year, and strong direct summer sun can scorch susceptible plants. Look for sunbeams reaching the leaves, curtains that filter them, and daylight at the actual spot. The window direction alone does not describe all those conditions.
Read growth together with the light
Minnesota Extension describes long, thin stems and widely spaced leaf nodes as possible signs of insufficient light. Excess light can scorch or bleach leaves. Treat those observations as clues rather than a complete diagnosis: record the affected growth and compare it with the conditions you observed.
Source: University of Minnesota Extension: Lighting for indoor plants
Make a repeatable comparison
Write down two candidate spots with a date, time, and weather note. For example: “shelf beside the window, curtain open, morning” and “desk opposite the window, same morning”. Keep those descriptions with the plant instead of simply naming the room.
If you compare phone light readings, use the same phone, position, and conditions. A momentary comparison does not capture the whole day or guarantee a suitable growing location. Add a photo before changing the spot and later note what happened, including the date of any move.
Your checklist
Tick off what you have already checked. Nothing is saved.
Frequently asked questions
Does a bright-looking room guarantee enough plant light?
No. Evaluate the actual spot, not just the room. Windows, obstructions, and the time of day affect what reaches the leaves.
Does a low-light plant grow without any light?
No. Plants require light. Low-light tolerance does not mean a plant can grow indefinitely without suitable daylight or supplemental plant lighting.
Connect light checks with a real location
Use Plantly light checks to compare spots, then assign the plant to its room and exact place. Keep the observation and any move in the journal. A phone check supports comparison; it does not replace the plant’s requirements or its growth history.
Explore the related Plantly feature
Sources
- University of Maryland Extension: Selecting indoor plantsextension.umd.edu
- RHS: Choosing the best houseplantsrhs.org.uk
- University of Minnesota Extension: Lighting for indoor plantsextension.umn.edu
Checked on 12 October 2026. This guide does not replace advice for your individual plant.
