AnĂșncios
Walk through any garden centre and you’ll see the same three phrases on every plant label: full sun, partial shade, shade. They sound self-explanatory. They are not. “Full sun” doesn’t mean “sometime during the day”; it has a specific definition that surprises most new gardeners. And the difference between “partial shade” and “shade” is the difference between a thriving plant and a slowly-failing one.
This guide covers what those labels actually mean, how to assess your own space, and the rough light needs of the most common beginner plants.
AnĂșncios
The labels, defined
| Label | Direct sun per day | What it looks like |
|---|---|---|
| Full sun | 6+ hours | Open ground, south-facing wall, sunny balcony |
| Partial sun / partial shade | 3-6 hours | East-facing balcony, dappled morning sun, the edge of a garden |
| Shade | Less than 3 hours direct | Under a tree, north-facing wall, deep corner of a balcony |
| Bright indirect (indoor) | No direct sun, but a window in view | Near a sunny window but not in the sunbeam |
| Low light (indoor) | Daylight only, no sky visible | Hallway, north-facing room, several feet from any window |
The trick is the words “direct sun.” Direct sun means the sun is shining on the plant unfiltered – no cloud, no curtain, no leaf canopy in the way. Diffuse daylight is not direct sun, no matter how bright the room feels.
How to measure what your space gets
You can’t outsource this. The only reliable way is to spend one sunny day actually watching your space.
- Pick a sunny weekend. Cloudy days won’t give you usable data.
- Every two hours from sunrise to sunset, note whether the spot you care about is in direct sun, partial sun, or shade.
- Tally up the hours of direct sun. That’s the number that matters.
It sounds tedious; it isn’t. You can do it while doing other things around the house. By evening you’ll know whether your “sunny window” is really a 4-hour partial-sun spot or an honest 7-hour full-sun spot. The difference matters enormously.
AnĂșncios
The shorthand for indoor light
Indoor light labels work a little differently because they assume you’re growing through a window. The key concepts:
Direct sun indoors: the sun is literally hitting the leaves through the window. This is what a south- or west-facing window gets for part of the day in summer. Many houseplants don’t actually like this – too much.
Bright indirect light: the room is full of daylight but the sun is not falling directly on the plant. This is what most houseplant labels mean by “bright light” – a plant a few feet back from a sunny window, or one beside a window without sun streaming on it.
Medium light: a few feet from a window, or directly beside a north-facing window. Bright enough to read comfortably during the day.
Low light: daylight reaches the spot but the sky isn’t visible from the plant’s position. A hallway. A corner.
For indoor plants specifically built for these tougher conditions, see our roundup of the best low-light indoor plants.
Window directions and what they actually offer
In the northern hemisphere (where most readers will be):
- South-facing window: the most light. Long hours of direct sun. Great for sun-loving plants – basil, succulents, citrus. Too much for ferns, peace lilies, calatheas.
- West-facing window: strong afternoon sun. Can get hot. Good for most herbs, fruiting plants, and bright-light houseplants.
- East-facing window: gentle morning sun, then bright indirect light for the rest of the day. A sweet spot for many houseplants.
- North-facing window: no direct sun. Only bright indirect or medium light. Good for ferns, pothos, peace lilies, snake plants.
(In the southern hemisphere, swap south and north.)
Common beginner plants and their actual light needs
| Plant | Wants | Where to put it |
|---|---|---|
| Basil | Full sun (6+ hours) | South or west window, sunny balcony |
| Tomato | Full sun (6-8 hours) | Sunniest outdoor spot |
| Lettuce | Partial sun (4-5 hours) | East-facing balcony or shaded summer garden |
| Mint | Partial sun to shade | Almost anywhere |
| Snake plant | Low to bright indirect | Anywhere indoors |
| Pothos | Low to medium indirect | Most indoor spots; avoid direct sun |
| Succulents | Bright direct sun | South window, sunny shelf |
| Peace lily | Medium to low indirect | Anywhere but direct sun |
| Marigolds (annual) | Full sun | Open, sunny outdoor spot |
Signs a plant isn’t getting enough light
- Tall, leggy growth – long stems with widely-spaced leaves, as the plant stretches toward whatever light it can find.
- Smaller new leaves than older ones.
- Pale or yellowish leaves on a normally green plant.
- Variegated leaves losing their pattern – the plant is dropping the white/silver parts to maximize photosynthesis.
- Few or no flowers on a flowering plant.
The fix is usually to move the plant closer to a window. If that’s not an option, a small LED grow bulb in a regular lamp is a surprisingly effective upgrade. Aim for 8-12 hours per day on a timer.
Signs a plant is getting too much light
- Crispy, brown, or bleached patches on leaves – especially the side facing the sun.
- Wilting in the heat of the day even though the soil is moist.
- Fading colour, especially on dark-leaved tropicals.
The fix: move the plant a few feet back from the window, or filter the light with a sheer curtain. Direct midday sun in summer is rougher than direct sun in winter.
What about grow lights?
Grow lights have come a long way. Modern LED full-spectrum bulbs are inexpensive ($10-25 for a basic bulb that fits a regular lamp), low-heat, and energy-efficient. For dim apartments or growing herbs through winter, they’re a small upgrade that makes a real difference.
The basic rules:
- Position the light 6-18 inches above the plant (closer for low-power bulbs, farther for high-power).
- Run it 8-14 hours per day on a timer.
- For most herbs and houseplants, full-spectrum white light works fine. The pink/purple “blurple” lights are slightly more efficient for flowering plants but uglier in a living room.
The takeaway
Light is the easiest factor to get wrong because it’s invisible and we’re bad at estimating it. The fix is also the simplest: measure rather than guess. Spend one sunny day watching your space. Read the label carefully when you buy plants. Match the plant to the spot, not the other way around.
Once you do, almost every other beginner plant problem – leggy growth, pale leaves, lack of flowers, refusal to thrive – quietly resolves itself. Light is the foundation. Everything else builds on top.
If you’re still picking which first plants to bring home, our guide to the 7 easiest plants for absolute beginners includes specific light recommendations for each one. And for the related skill of figuring out when to water based on light conditions, our how often to water plants guide is the natural next read.
See also: a quick reference cheat sheet of sun vs shade plants.
