The Light You Actually Have
Window direction, how to measure your light without buying anything, what "low light" really means on a plant tag, and when it is time to stop pretending and add a lamp.
Light is where most apartment plant problems actually begin, and it is the hardest thing in this subject to judge by eye. Your vision adapts to a dim room within minutes and then tells you the room is fine. The plant gets no such adjustment.
Start with the light estimator: answer six questions about your window and get a foot-candle range and a band, built on the scale published by University of Illinois Extension. It will also tell you which of your answers is holding the spot back, which is usually not the one people expect.
Which Window Direction Is Best for Houseplants? Ranked in Foot-Candles
The best window direction for houseplants, ranked: south gives the most light, east and west read identical on a meter, north gives the least.
9 min readNorth-Facing Window Plants: What Actually Grows There
North facing window plants get about 150 foot-candles at the glass. Which grow in that, which only survive it, and why the low light lists disagree.
10 min readEast vs West Facing Windows: Same Number, Different Day
East vs west facing windows sit in the same band on every light chart. The foot-candles match, the heat does not, and that decides what survives.
10 min readSouth Facing Window Plants: The Most Variable Light You Own
South facing window plants live in the most changeable light in the apartment. It swings by hour, by season, and by whatever is above the glass outside.
10 min readBathroom Plants for Low Light: The Humidity Is Not the Point
Bathroom plants low light guides sell humidity as the selling point. The light is what decides, and the shower steam is gone before it counts.
8 min readDo Plants Need Darkness? For Some, It Is the Trigger
Do plants need darkness, or just light? Sixteen hours is the published ceiling, and for a few common plants an uninterrupted night is what makes them bloom.
9 min readHouseplant Winter Care: The Light Goes First
Houseplant winter care starts in September, not December. Half the year's daylight is gone by the equinox, and here are the changes that follow it.
10 min readSpring Light Changes for Houseplants: Your South Window Is About to Rearrange Itself
Spring light changes houseplants live in more than people expect. A south window does not just get brighter. It changes shape, and some spots lose light.
9 min read