Most succulents want bright light, not deep shade, but they do not always want the harsh afternoon sun that bakes a hot window. The simple succulent sun requirements are at least 6 hours of bright light a day, with some shelter when the sun turns brutal. So the real answer is both: lots of light, just not always the strongest rays.
You see this play out on your own sills. Two windows a few feet apart can grow very different plants, since the light drops off fast as you move away from the glass. A rosette right at a sunny pane stays tight and colorful. The same plant on a side table a few steps back goes pale and floppy. The glass is the line between thriving and slowly fading, and it is closer than most people think.
This is the question of how much light do succulents need to look their best. Succulents grew up in sunny, dry places like deserts and rocky hills. Strong light keeps them compact and brings out their reds, pinks, and purples. In weak light they stretch toward the window and turn a flat green instead.
University extension teams put a number on it. West Virginia University and Iowa State both point to at least 6 hours of bright light each day for healthy growth. Texas A&M gardeners say to use the brightest window in your home for indoor plants. Hit that 6-hour mark and most types will hold their shape and color through the year.
But there is a catch with very strong sun. A plant grown soft indoors has tender leaves that are not toughened to direct rays. Move it into hot afternoon sun all at once and you get succulent sunburn, which shows up as pale or brown scorched patches. UC Master Gardeners say many succulents like shelter from hot afternoon sun. Outdoor plants in full sun face the same risk during a heat wave.
The fix is to bring up the light slowly so the leaves can harden off. Start a plant in a spot with a few hours of gentle morning sun. Add an hour or two each day over a week or two until it sits in full light. Skip to scorching midday sun in one jump and you trade strong color for damaged leaves. This slow build is the part of healthy succulent sun requirements that people miss most often.
Where you put each plant depends on your window and the season. Here is a quick map of common spots and what each one suits best.
For most homes the brightest window you have is the right home for your succulents. A south-facing window gives the strongest indoor light through the day. In peak summer, hang a sheer curtain to soften the worst midday glare on tender plants.
Let the plants tell you when the light is off. Stretching and reaching mean too little light, so move the pot closer to the glass or to a brighter window. Brown or bleached patches mean too much sun too fast, so pull the plant back and shade it during the hottest hours. Read those two signs and you will match nearly any succulent to the right spot.
Read the full article: Succulent Plants: Complete Care Guide
