I had a beautiful echeveria rosette with burgundy tips, but now it's turned completely green and looks kind of droopy. It's on a south-facing window, and I water it rarely. Is it because there's not enough light, or could it be overwatering?
I had a similar situation - my echeveria turned green precisely from too much water, even though it was in a bright spot. The red pigment appears under stress (bright light, cold, drought), but excess water actually relaxes the plant and it loses its color. Try cutting back on watering even more - only water when the soil is completely dry, and if possible move the pot closer to the window glass so it gets maximum light. If the roots have rotted, you'll need to take it out of the pot and check - healthy roots are white, rotted ones are brown and soft.
Most likely it's overwatering after all - echeveria loses its red pigment specifically from too much moisture, even if it's getting enough light. Check if the base of the rosette has softened, and try repotting it into dry soil if the roots look suspicious. After that, water only when the soil is completely dry, or better yet, make it harder for water to stick around - add more sand or perlite to your soil mix so moisture drains through faster. The red color should come back within a month or two, as long as the plant hasn't started rotting.
Don't rush to water it hoping to restore the color - that'll only make things worse. If the rosette has already lost its firmness, extra water can lead to rot. First check the condition of the roots and base: if it's soft there and smells bad, you need an urgent repot into fresh, dry soil.
The thing is, red and burgundy tones in succulents are a stress response: bright sun, cold, lack of moisture. When the plant gets too comfortable and wet, it loses this "battle colors" and becomes uniformly green and limp. I had the exact same situation at my dacha - a rosette with beautiful red tips slowly turned green, and I also thought at first it wasn't getting enough sun, even though the window faced south. Turns out I was watering it too often, even less frequently than recommended - the soil just wasn't drying out completely between waterings.
The solution is simple: let the soil dry out completely, water even less often (literally once every month or so in summer, barely touch it in winter), and the red pigment will gradually come back. If the rosette has completely lost its turgor, repot it into cactus soil, pressing it slightly higher so the base doesn't touch the wet soil. You'll see results in 2 - 3 weeks 🌵
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