I have had a similar problem. Early last year I bought a Notocactus submammulosus from a store. It was growing in peat so I decided to report it in cactus compost. I was getting the wet peat from the roots when the whole rootball came away leaving a bare plant. I let it dry for 2 weeks then planted ...

In my experience in the UK, RSM only appear in very hot dry conditions- they seem to disappear when the humidity inceases.

Last year I was repotting a Notocactus submammulosus & in clearing the old compost the whole rootball came away leaving the bare base of the plant. I let it dry for 2weeks & then inserted it into a dry very gritty mix. I left it for another 2 weeks then sat the pot in a little water for a fe...

Thanks guys. I guess I'll just have to wait for them to drop off.

Hi guys Could somebody give me some advice please? The Selenicereus volidus seedlings (as attached photo) we're sown July 1 & are growing well-the longest stems are about 11/2 inches long-but they still have their cotyledon leaves attached. You might just be able to see them. Will these drop off...

Parodia cardenasiana?

Having studied Melocactus ernestii I think it might be ssp longicarpa. Anyone concur?

Melocactus sp?

I would agree oxygona eleestephane. It's almost identical to mine except mine hasn't got offsets

Thank you teo, elieestephane, tofterigen, jfabiao & aiko. I will study Tricocereus species. The spines are at least 75mm long

I bought this fierce fellow yesterday. Is it a Ferocacus? If not, can anyone identify it please?

Thanks Wilk- I'll watch out for that

Thanks Salazar & jfabiao for your help

Thanks Spence. How long should I leave them in the bag?

I keep buying these unidentified cacti but it seems to be impulsive. Can anyone identify them please? Thanks for any help