I've had this on my M saboe . I'm not sure either, but intuition tells me that if damage is occurring at the far reaches of the plant ie tips of the tubercles then the conditions in that area are not suitable to sustain growth ie too hot or too dry, or both. The plant has to be healthy enough take u...

Lovely plants, mine's just coming into flower now, nothing like as good as yours though

I have no idea how you manage to grow cacti in Sweden! At least you're guaranteed a cold winter. Good luck is all I can say!

Or you could try growing more free flowering genera eg Rebutia, Lobivia, Mammillaria, Gymnocalycium etc

I must admit I do give them all a greeting in the morning when I begin the daily greenhouse tour, but not much more than that. Perhaps I should have a bit more of a chat with them, according to this: http://www.discovery.com/tv-shows/mythbusters/mythbusters-database/talking-to-plants.htm Anybody els...

Certainly one of the best "small body:large flower" Mammillarias there is!

I'm on the lookout for one if anyone has a spare

I've been away for a few days and despite the automatic vent opening in the roof of the greenhouse the temp at one point reached just over 50°C. I don't think anything has suffered too badly but then I noticed this C magnifica looking decidedly off colour, with dull yellow blotches: 2014-06-10 11.49...

Never seen a greenhouse like that before! What challenges does the climate have for you as a grower? I don't suppose you get cold winters for starters.

But great news if you're buying