Right against south glass, an areca palm scores 100 out of 100. That’s at 22 °C and 50% humidity, with an estimated 13,000 lux on the spot, and the card rates the light just right. A metre back the score is still 100, and two metres back it’s 98. Half a metre further it drops to 67 as the light turns a little dim, and at five metres, flagged too dim, it reads 47.
Read on 14 October 2026, the care pages near the top of Google’s results agree about the window. The Spruce, Adams Fairacre Farms, Warner Companies, rouge ’n’ love and Dahing Plants each send an areca to a south or west window, and The Spruce asks for “bright, filtered sunlight” there. The hedging sits in the answer box at the top of the page. It wants filtered light rather than harsh midday sun, warns that unfiltered rays through glass can burn the fronds, and suggests a few feet of distance or a sheer curtain. None of them says where in the room the palm starts to go short.
Great fit
This plant should be happy in this spot.
Just the right amount of light
Comfortable temperature
Humidity suits it
Airflow suits it
On the window, our scores back the care pages. We probed the same palm a metre from each of the four windows, and south and west both hold it at a great fit there. Two metres back, only south still does. East keeps a great fit within half a metre of the glass and loses it by one metre. At a north window even the sill rates only worth a try, and the north page follows the palm from there.
Is a south window too much sun for an areca palm?
Not by our scoring. The published figures are split on how much light it wants; here they are as each source prints them, units unchanged:
| Who publishes it | What it says an areca palm needs | What the figure is |
|---|---|---|
| getgrowli.app | 4,000–8,000 lux | Areca palm, filed under the site's "Bright Indirect" tier; the site prints this same band for several plants |
| getgrowli.app | 400–800 fc | The same tier, given in foot-candles on the same page |
| foliage-factory.com | approx. 10,000–20,000 lux | Shop product page, under Chrysalidocarpus lutescens (another name for the same palm), labelled bright indirect |
| mrec.ifas.ufl.edu | 5,000 to 6,000 foot-candles | UF/IFAS commercial production level, "about 50% shade"; the live page is gone, read from a 13 August 2025 archived copy |
Two sources put this palm in different parts of a south room. Foliage Factory’s 10,000 to 20,000 lux covers the sill and the one-metre row, both full hundreds in our table. Growli’s 4,000 to 8,000 lux starts somewhere behind one metre and stops just short of three, a stretch holding the 98 at two metres and the 67 at two and a half. Our care data agrees with Foliage Factory about the glass and stops rating the light ideal between the 6,300 and 5,000 lux rows, well inside Growli’s band. The UF/IFAS number is a production level for nurseries growing the palm under about half shade, brighter than any spot in our table.
The burn the answer box warns about is a question our score can’t answer. It rates how much light reaches a spot against the plant’s band, and it has no input for a frond that went from a dim shop floor to a midday beam in one day. On the amount alone, 13,000 lux sits inside this palm’s band.
How far back from a south window can an areca palm go?
About two metres. Same plant, same south window, nothing changed but the distance:
| Distance from the glass | Estimated light | What the light is doing | Verdict |
|---|---|---|---|
| 0.3 m, against the glass | 13,000 lux | Just the right amount of light | Great fit, 100/100 |
| 1 m back | 10,000 lux | Just the right amount of light | Great fit, 100/100 |
| 2 m back | 6,300 lux | Just the right amount of light | Great fit, 98/100 |
| 2.5 m back | 5,000 lux | A little dim, but workable | Worth a try, 67/100 |
| 3 m back | 3,969 lux | A little dim, but workable | Worth a try, 66/100 |
| 4 m back | 2,500 lux | A little dim, but workable | Worth a try, 63/100 |
| 5 m back | 1,575 lux | Too dim here | Not the best fit right now, 47/100 |
The score barely moves for two metres and then steps down. Probing between the rows, the step sits between 2.1 and 2.2 metres, about seven feet, with a great fit on one side and worth a try on the other. Behind it the light keeps thinning until it’s flagged as too dim.
So the answer box’s few feet cost nothing. Six feet back still rates a great fit. The risk at a south window is the back of the room, which matches what the hallway page found three metres down a corridor, where the areca was one of the high-light plants that didn’t clear the spot.
A parlor palm at the same glass runs the other way, flagged on the sill and a great fit only from about two and a half metres back. Probing between, the two never share a great-fit spot: from about 2.2 to 2.4 metres both rate worth a try. That page scores six palms a metre from south glass, and the kentia is a great fit at one metre and at two and a half.
Is bright indirect light the right target for an areca?
Only its brighter end. Several of the care pages ask for bright indirect light, and the app’s meter gives that label to anything from 2,500 lux up to just under 10,000. Set that range against the distance table and most of the floor it covers lies behind the step. The two-metre row falls inside it and is a great fit. So do the rows at two and a half, three and four metres, and each of those is only worth a try. The two spots that score a full hundred, the sill and one metre, sit at or past the top of the label.
Our lux column is an estimate worked out from the window’s direction, the pot’s distance and a clear sky. It isn’t a meter reading, which is why a real reading at your spot is worth taking before the pot goes down.
Does a hot south sill bother an areca palm?
Past 28 °C, yes. Keep the pot on the sill, change only the air temperature, and the light reading never moves:
| Air temperature at the sill | Verdict |
|---|---|
| 16 °C | Worth a try, 64/100 |
| 19 °C | Great fit, 99/100 |
| 24 °C | Great fit, 100/100 |
| 28 °C | Great fit, 99/100 |
| 29 °C | Worth a try, 68/100 |
| 33 °C | Not the best fit right now, 48/100 |
From 19 to 28 °C the sill holds 99 or 100. At 29 °C it drops to 68, and at 33 °C to 48. Every row gets the same 13,000 lux, so the points lost at the warm end are all heat.
A south sill in full sun with the window shut can run well above the thermostat. The table fixes the temperature per row and can’t tell you how far; a thermometer left there one bright afternoon can. The answer box’s note that the soil dries faster on that sill is the same warmth reaching the pot.
The cold end reads 64 at 16 °C. Dry air costs less than either end: at 30% humidity the sill still rates a great fit, and it slips to a good fit at 26% and to worth a try at 24%.
All of this assumes an open south window and a clear day. Shade outside the glass takes light off every row and shortens the great-fit run from the back. The south window guide covers what else takes the full beam, and the free spot checker scores your own spot with local weather.
Published October 14, 2026
