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My succulent has developed some weird disease, first it only looked as if something was eating it but then the leaves started turning pale and yellow.. I never fertilize it and I irrigate it once a week. Does anyone has an idea what the disease is about and how to treat it? enter image description here second angle

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To me it looks like over watering or poor drainage. If this is a cactus/succulent pot then don't water it on a schedule. Water it when the soil has a chance to go dry.

  • I see overwatering, plus the leaves are being digested (by the plant, to keep it alive), which is a sign of low light, NOT low soil nutrition. I'd say less water, much more intense light. – J. Musser Dec 30 '15 at 19:07
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The problem does look likely to be environmental rather than an infestation or disease. Jade plants (Crassula argentea) like plenty of sunlight, particularly in winter, and good air flow around them, so if it's in the house, near an open window in summer is helpful. You haven't said where you're keeping your plants but I think that's a Haworthia I can see in the background, off to the left, which appears to be in the same container. Haworthia do not like direct sun, they just need strong daylight, so the two plants are somewhat incompatible in terms of light requirements. They like average temperatures, but much prefer a good differentiation between day and night temperatures, rather than its being even all the time. It doesn't seem as if you're overwatering particularly, but all succulents should have reduced watering in winter, only sparingly watered, and once a week may be too often if it's winter where you are.

At this stage, I'd suggest you take it out of the container it's currently in and pot it up separately, giving it the conditions it requires, to see if it recovers and grows normally.

  • Thank you for the informative answer! It is a Haworthia next to the Jade, I grow both of them outside on the sunny side, although most of the day the place is shaded and does not get direct sun. But I will transfer the Haworthia to a lighted spot but not in the direct sunlight, if I understand correctly. It is winter now but it doesn't rain every week. On rainy weeks or if the soil is still wet, I don't water them at all. I'll try to move the Jade to a sunny spot and see if it gets better. Again, thank you very much! Marina – Marina Jan 1 '16 at 17:29

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