A Burgundy rubber plant on a north sill scores 65 out of 100, worth a try. At 3,640 lux the light reads a little dim, while warmth, humidity and airflow sit where it likes them at 22 °C and 50% humidity. A metre back it scores 64, a metre and a half back 63, and at 1.8 metres the light gives out and the score drops to 47.
Read on 14 October 2026, the top results disagree about this window. Big Plants Chicago says an unobstructed north window will be fine, anywhere within six to eight feet of it. Bababerry rates north as tolerated, where the plant survives but grows slower and duller. JOMO Studio lists the spot against north glass as the least light a rubber plant will take. A Penn State Master Gardener, asked about a north room, decided it might be “worth a try”. Clemson’s extension sheet calls it adaptable to low light; Rural Sprout says it gets leggy there.
That Penn State guess is our verdict, word for word, and it’s also the ceiling: no spot at this window and no month we scored gets the plant past it.
Worth a try
It can work here with a little care.
A little dim, but workable
Comfortable temperature
Humidity suits it
Airflow suits it
Can a rubber plant survive in a north-facing window?
On the sill, yes. The card above flags one dimension of the four, and it’s light. The other three read fine at these settings, so the plant is short of light and nothing else. It can hold its leaves in that state for years, which is why people with a north window often call theirs healthy. What it won’t do is put on much new growth. Worth a try sits one rung under good fit and one above not the best fit right now, and at this window that rung is as high as the plant gets.
Here is what other sources publish for this tree, each in its own unit:
| Who publishes it | What it says a rubber plant 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 |
| bbg.org | as little as 250 foot-candles | India Rubber Tree (Ficus elastica) |
| bbg.org | 4,000 to 8,000 foot-candles | India Rubber Tree (Ficus elastica) |
| extension.arizona.edu | 75–150 foot-candles | listed under the heading "Medium Light (75–150 fc)" |
| houseplantjournal.com | 400 FC (80 µmol) foot-candles | minimum indirect light level |
| houseplantjournal.com | 800 FC (160 µmol) foot-candles | good indirect light level |
| houseplantsnook.com | 200–400 foot-candles | chart fc level |
Brooklyn Botanic Garden gives two figures for the same tree: the least light that will sustain it, and a far higher range for much better growth. A north sill sits much nearer the first of those.
How far from a north window can a rubber plant go?
Less than six feet. One of the results above allows six to eight, so both are in this table, as 1.8 and 2.4 metres. The lux column is an estimate from the window direction, the distance and a clear day, not a meter reading, and a tree or a balcony outside takes off more than this window has to spare:
| Distance from the glass | Estimated light | What the light is doing | Verdict |
|---|---|---|---|
| 0.3 m, against the glass | 3,640 lux | A little dim, but workable | Worth a try, 65/100 |
| 1 m back | 2,800 lux | A little dim, but workable | Worth a try, 64/100 |
| 1.5 m back | 2,222 lux | A little dim, but workable | Worth a try, 63/100 |
| 1.8 m back | 1,935 lux | Too dim here | Not the best fit right now, 47/100 |
| 2.4 m back | 1,466 lux | Too dim here | Not the best fit right now, 47/100 |
| 3 m back | 1,111 lux | Too dim here | Not the best fit right now, 46/100 |
Out to a metre and a half the score hardly moves, 65 down to 63, with the light a little dim on every row. Then it steps. Between 1.5 and 1.8 metres the estimate falls from 2,222 to 1,935 lux, the light column turns to too dim, and the score drops to 47. Six feet is just past the edge. Eight feet is well past it.
Six feet is sound advice for a south room, where this plant keeps a great fit out to two metres. At north glass the same six feet puts the pot on the wrong side of the step, one row into the too-dim part of the table.
If the table looks familiar, a fiddle leaf fig at the same north glass has nearly the same one, and that page works through why owners on both sides of the argument are telling the truth.
Does a north window get better for a rubber plant in summer?
By a point. Given a date and a latitude, the engine allows for how high the sun climbs. This is the sill from the card at latitude 51, around London or Calgary:
| The month it is | Estimated light | What the light is doing | Verdict |
|---|---|---|---|
| January | 1,870 lux | Too dim here | Not the best fit right now, 47/100 |
| February | 2,695 lux | A little dim, but workable | Worth a try, 64/100 |
| June | 4,368 lux | A little dim, but workable | Worth a try, 66/100 |
| October | 2,648 lux | A little dim, but workable | Worth a try, 64/100 |
| November | 1,841 lux | Too dim here | Not the best fit right now, 47/100 |
| December | 1,820 lux | Too dim here | Not the best fit right now, 47/100 |
June is as bright as the sill gets, 4,368 lux, and the score rises to 66. Still worth a try. Summer stretches the usable strip to about two metres and leaves the verdict where it was.
Winter is where it bites. From November to January the sill reads 1,820 to 1,870 lux, darker than the 1.8-metre row of the distance table, and the sill itself scores 47. For those three months nowhere in a north room at this latitude suits the plant. At 40 degrees, New York or Madrid, the sill holds at worth a try through December, but the usable strip narrows to about half a metre.
Pulling it right up to the glass for winter has a cost of its own on cold nights, which the winter guide covers.
Isn’t a north sill bright, indirect light?
By the label, yes. Our care data asks for lots of bright, indirect light for this plant, and so do several of the care pages above. The app’s light meter calls anything from 2,500 to under 10,000 lux bright, indirect, so a north sill on a clear day qualifies, and so does the spot a metre back.
The label is met and the plant is still short. Its light reads as right only well above anything a north sill delivers; even June’s 4,368 lux falls short. Bright, indirect is a span four times wide, and this plant needs more of it than a north window has.
Which window suits a rubber plant better?
Any of the other three, kept close. At an east window the sill is a great fit and a metre back is already flagged. A west window holds a great fit out to about a metre. South reaches about two metres. Two metres back from an east or west window lands on the same verdict as this north sill, much as JOMO Studio groups them.
What if north is the only window you have?
Then the sill, as close to the glass as the frame allows, and patience, because growth there is slow. The north window guide pairs this plant with the African violet as the two names its source lists shouldn’t have carried. A grow light would close the gap; we haven’t scored one here. For your own window, set the phone where the pot would go and the free spot checker reads that spot.
Published October 14, 2026
