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For me it has been more about direction than intensity. They need strong light to grow well, otherwise they grow tall and the sides are exposed,...
New leaves grew the next year.
Yes, it has happened to mine when the leaves have been hit by direct sunlight from the side.
If the flowers are large (a few inches wide), then it is likely one of the many hybrids between Epiphyllum and similar genera (these hybrids are...
What do you mean with "got worse"? There is something going on with the skin, but the plant looks dry too. Are the roots healthy?
Thanks! Just be careful, it might get sunburned if exposed to too strong light too quickly.
I cannot rule out Peanut Cactus as a possibility, but I do not believe I have seen them growing aerial roots. BTW, the central stem in the last...
Aerial root. Can be cut off if you find it unsightly. I guess this is an epiphytic cactus?
Does that mean that the side with the blotches was facing southwest in its original location too?
No.
I don't think it has to do with the roots, this looks like a fungal infection. I would cut off all diseased parts and perhaps take a spare cutting...
This looks both familiar and unfamiliar at the same time. There is webbing and white ... things that makes me think mite or mealy bug attack, but...
It could be a virus, but the pattern is not distinctive enough for definite diagnosis.
My first guess would be overheating or ultraviolet radiation. Try some kind of shading and/or ventilation. If it spreads despite that it could be...
This plant has too few spines for grahamii, IMO. Growth rate varies hugely between different species and growing conditions, but in general I...
Yes, that is a Mammillaria. I cannot say exactly what it is, there are so many species and forms of Mammillaria, but I see similarities to...
Definitely Echinocereus, my guess is viereckii ssp. morricalii.
An areole does not need to be present (it could have been damaged or removed, for example), but the vascular tissue that transports...
Dead tissue should preferably be removed before repotting (and the rest allowed to heal before repotting). I found living roots inside my...
Looks like a Hatiora salicornioides ("Drunkard's dream"), but I need a close-up of the stems to be sure.