What Light Does a Northwest Window Get?
A northwest window sits between the north and west orientations, and its light character reflects both. For most of the year it receives no direct sun at all. The sun rises in the east, arcs through the southern half of the sky in the northern hemisphere, and sets in the west. From autumn through spring, the sun's setting point is far enough south that it never reaches the northwest quadrant, so a northwest window sees nothing but indirect light during those months.
In summer the story changes slightly. As the days lengthen and the sun's setting point shifts northward, it briefly touches the northwest. This typically means a window may receive 30 to 90 minutes of low-angle direct sun on clear summer evenings. That sun is softer and less intense than midday south-facing direct sun, and it arrives at an angle that means it skims across rather than pours into the room. Plants right at the glass will feel it; anything a metre back will not.
In lux terms, a northwest window on a bright day delivers around 500 to 1,500 lux during peak daylight hours. On overcast days in winter those numbers can drop below 300 to 500 lux, which is below the threshold for sustaining growth in most plants. Compare that to a south window at midday in summer, which can reach 10,000 to 50,000 lux of direct sun, and the gap becomes clear. Northwest is a low-light environment by any houseplant standard.
The indirect light quality is cool and diffuse. Because the northwest window faces away from the sun's main path, light entering it is reflected off the sky, clouds, and surrounding surfaces rather than arriving directly from the sun. This makes it gentler and more even than light in south or west windows, with less risk of burning sensitive foliage, but also less usable energy for photosynthesis.
Best Plants for Northwest Windows
The plants that reliably succeed in northwest windows are those that evolved under a forest canopy, where receiving filtered, low-intensity light is normal. These species have efficient photosynthetic systems tuned to make the most of limited light.
Pothos (Epipremnum aureum) is probably the most forgiving plant for a northwest window. It can tolerate light levels as low as 100 to 200 lux and will grow, if slowly, even in quite dim conditions. In a northwest window it stays healthy and produces new leaves at a modest pace. The golden and neon varieties retain more color in low light than heavily variegated types, which need more brightness to maintain their markings.
Snake plant (Sansevieria, now reclassified as Dracaena trifasciata) is one of the most light-adaptable houseplants sold. It survives and maintains its appearance in the 200 to 800 lux range a northwest window provides. Growth will be slow, but the plant will not decline. It is also drought-tolerant, which matters in low-light situations where soil stays wet longer than expected and overwatering becomes a risk.
ZZ plant (Zamioculcas zamiifolia) stores energy in its rhizomes, which allows it to withstand long periods of low light without visible decline. It is one of the best choices for consistently dim northwest windows, especially in autumn and winter. It grows slowly regardless of conditions, so the reduced growth rate in low light is less noticeable than with faster-growing species.
Peace lily (Spathiphyllum) is a natural understory plant that handles indirect light well. In a northwest window it will maintain its foliage and may still flower, though flowering is more reliable in brighter conditions. It signals its displeasure at low light by drooping slightly before the soil is dry, which is a useful cue without being catastrophic.
Chinese evergreen (Aglaonema) comes in a range of varieties, and the darker green types are the most tolerant of low light. Varieties like Aglaonema commutatum with deep green leaves perform better in northwest windows than the pink, red, or highly variegated cultivars, which need more light to stay vibrant. A dark green Chinese evergreen in a northwest window will hold its color well and grow steadily.
Heartleaf philodendron (Philodendron hederaceum) is a fast grower in bright conditions that adapts well to lower light. In a northwest window it will slow down but remain healthy and continue producing leaves. It is more accepting of the cool indirect light in a northwest window than the more light-hungry pothos varieties.
Cast iron plant (Aspidistra elatior) earns its name. It tolerates neglect, low humidity, temperature swings, and very low light. Light levels that would stress most houseplants are unremarkable to an aspidistra. It will not grow quickly in a northwest window, but it will persist without complaint in conditions that would defeat most other plants.
Dracaena (particularly Dracaena marginata and Dracaena fragrans) handles low to moderate indirect light without significant decline. The cane-type dracaenas are slower growing but stable in northwest windows. Avoid the colorful, high-contrast varieties in the dimmest windows, since those need more light to maintain their leaf patterns.
Plants to Avoid in Northwest Windows
Some plants need far more light than a northwest window provides and will decline regardless of how well you care for them in other respects. Placing a high-light plant in a northwest window does not just slow its growth; it sets it on a path toward leaf loss, root rot from soil staying too wet, and eventual death.
Succulents of all types, including echeveria, haworthia (though haworthia tolerates more shade than most), aloe, and jade, need sustained bright light to maintain their compact form and stay healthy. In a northwest window they etiolate quickly, stretching toward the light and losing the tight rosette or upright form that makes them attractive. The low light also means soil stays moist far longer than succulents can tolerate, making root rot almost inevitable.
Cacti share the same problem. They are adapted to extremely high light environments, often 10,000 lux or more in their natural desert habitats. A northwest window in winter delivering 300 to 500 lux is the equivalent of placing them in near darkness. They will not grow and may begin to soften or discolor within months.
Fiddle leaf fig (Ficus lyrata) is a high-light ficus that drops leaves rapidly when unhappy with its conditions. It needs at least 1,000 to 2,000 lux of consistent indirect light to hold its leaves, and it prefers considerably more. A northwest window, particularly in winter, regularly falls below that minimum. Fiddle leaf figs are also sensitive to being moved, so placing one in a northwest window and then trying to fix the situation by moving it often triggers a second round of leaf drop.
Citrus trees, including indoor Meyer lemon and calamondin varieties, need very high light levels and ideally some direct sun to produce fruit and stay healthy. A northwest window cannot support citrus long-term. The plants may limp along but will not fruit and will gradually decline over winter.
Culinary herbs, including basil, rosemary, thyme, chives, and mint, are grown for their edible foliage and need the photosynthetic output of at least a moderately bright window to keep producing. Basil in particular collapses quickly in low light. Even the more tolerant herbs like mint will become leggy and flavorless in a northwest window without supplemental lighting.
How Northwest Windows Compare to North and Northeast
Understanding where northwest sits relative to the other low-light orientations helps you calibrate expectations and make good decisions when choosing between rooms or window positions.
A true north window is the dimmest orientation year-round. In the northern hemisphere the sun never directly faces north, so north windows receive only reflected skylight. In summer a bright north window might deliver 500 to 800 lux; in winter that can drop to 200 to 400 lux. There is no direct sun at any point in the year. Plants that survive in north windows are the genuinely shadow-tolerant ones: pothos, ZZ plant, cast iron plant, and very little else.
A northwest window is slightly better than north because of the summer evening sun. That brief period of direct light, even if low in angle and limited to a few months, adds meaningfully to the total light energy the window delivers in summer. A plant in a northwest window in June or July is in a meaningfully brighter environment than the same plant in a north window. In winter, the difference between northwest and north narrows considerably, since the summer sun angle disappears.
A northeast window is a different character entirely. Northeast windows receive direct morning sun year-round in the northern hemisphere, because the sun rises roughly in the northeast from spring through autumn and only dips toward the east-southeast in deep winter. That morning sun, while gentle and cool, is consistent across more of the year than the summer-only evening sun a northwest window gets. A northeast window in November will still catch some early-morning sun on clear days; a northwest window in November receives no direct sun at all.
For the widest range of plant success without supplemental lighting, northeast ranks above northwest. Both rank above north. If you have the choice between a northeast and northwest window for a light-sensitive plant, the northeast window is the better option outside of summer. In summer the gap closes significantly and both orientations become viable for a similar range of plants.
Tips to Maximize Northwest Light
The northwest window itself is fixed, but the environment around it is not. Several practical changes can meaningfully increase how much usable light your plants receive, particularly in the lower-light months.
Wall color has a larger effect than most people expect. A white or very light neutral wall reflects available light back into the room and toward your plants. Dark walls absorb light that would otherwise bounce around the space. If the walls nearest your northwest window are painted a deep color, even repainting the window wall and the wall opposite it a lighter shade will increase ambient light levels noticeably. This is a low-cost change that compounds over months.
Mirrors and reflective surfaces can be positioned to direct available light toward plant displays. A large mirror on the wall opposite a northwest window acts as a second, indirect light source by bouncing the incoming light back across the room. This works best when the mirror can see the sky through the window directly. Metallic plant trays, light-colored ceramic pots, and glossy tiles around a plant shelf all contribute in smaller ways.
Keeping windows clean is underrated. Dust, grime, and condensation residue on glass can reduce light transmission by a meaningful percentage. A clean window in a northwest exposure delivers noticeably more light than a dirty one. Clean both sides of the glass if accessible, and check for any net curtains or frosted film that may be reducing transmission without you realizing it.
Grow lights are the most reliable solution for a northwest window in winter. A full-spectrum LED grow light positioned 20 to 40 cm above the plant canopy and run for 12 to 14 hours per day can fully compensate for the reduced natural light from October through February. Modern LED grow lights are energy-efficient and do not produce the excessive heat of older fluorescent or incandescent grow lights. Even a small clip-on model pointed at a single plant can make a meaningful difference. A smart plug with a timer removes the need to remember to switch it on and off.
Plant rotation helps if you have multiple windows with different orientations. Moving plants between a northwest window in summer, when the light is at its best, and a south or east window in winter can give them the best of both conditions. Many houseplants handle moderate repositioning well as long as the transition is not abrupt.
FAQ
What plants grow best in a northwest window?
The best plants for northwest windows are low-to-moderate light houseplants that evolved under canopy cover. Pothos, snake plant, ZZ plant, peace lily, Chinese evergreen, heartleaf philodendron, cast iron plant, and dracaena all perform well. These plants can sustain healthy growth in the 500 to 1,500 lux range that a northwest window typically delivers, and some will tolerate the occasional cooler temperatures that northwest-facing rooms can experience in winter.
Is a northwest facing window good for plants?
A northwest window is a workable spot for the right plants, but it is not a good location for most. The window delivers low indirect light for most of the year, with a brief window of direct sun in summer evenings. Plants that need bright light, including succulents, cacti, fiddle leaf figs, and most herbs, will decline. Low-light specialists like pothos, snake plant, and ZZ plant are the reliable choices. Adding a grow light in winter significantly expands what you can successfully keep in a northwest window.
What is the light like in a northwest window?
Northwest windows deliver mostly cool indirect light throughout the year, typically in the 500 to 1,500 lux range during daytime hours. In summer, they may receive a small amount of direct sun in the late afternoon or evening as the sun sets toward the northwest, but this is brief and lower in intensity than what a south or west window gets. In winter, the sun's path shifts further south, meaning northwest windows receive no direct sun at all and light levels can drop below 500 lux on overcast days. This makes northwest windows one of the dimmer orientations, sitting just slightly above true north in the overall ranking.
Can succulents grow in a northwest window?
No, succulents need a minimum of 3,000 to 5,000 lux of bright direct or intense indirect light to maintain their compact form and stay healthy. A northwest window cannot deliver that consistently. Succulents placed in northwest windows typically etiolate within weeks, meaning they stretch toward the light source, become leggy and pale, and eventually rot from overwatering because the low light means the soil stays moist far longer than the plant expects. A south or west window is the minimum requirement for most succulent varieties indoors.
How can I help plants grow better in a northwest window?
The most effective improvement is adding a dedicated grow light, particularly in the autumn and winter months when natural light in a northwest window drops to its lowest levels. Position the grow light 20 to 40 cm above the foliage and run it for 12 to 14 hours per day. Beyond artificial light, paint nearby walls white or a light neutral color to maximize light reflection toward the plant. Place a mirror or other reflective surface on the wall opposite the window to bounce available light back into the room. Keep the window glass clean, remove any net curtains, and place plants as close to the glass as possible without touching it.