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Hi there.
I live in England, and I have been growing some cacti for about four years now, but I don’t know what they are. They have never flowered, and I was wondering if you could identify them?
I know that the one on the far left is Astophytum ornatum, and that the one one in from the right is Opuntia subulata. I have only had these for about two months.

Wiltshire-20130704-00637 (1)

Also, could you please give me some tips as to how to make them all flower?
Thanks very much.
Helena

Helena,
The Opuntia subulata looks likes it’s probably a O. subulata monstrose, which means it won’t get as tall, which is probably a good thing. The one on the far right could be a Cereus, but I wouldn’t be sure of the species until it blooms, which could be many years depending on the species – they often won’t bloom until they’re 6 ft. tall or more! The one on the left looks like it’s not getting enough sun, so it’s hard to tell for sure what it is, but either a Mammillaria or a Rebutia.

As for flowering, the Astrophytum looks large enough to flower, as well as the Mammillaria/Rebutia. However the other two wouldn’t bloom for many years. To help the first two along in blooming I recommend a lot of sun and a bloom food – Bone Meal, and we prefer Fish Bone Meal, works well.

Depending on where you live in England the sun could be a problem, in which case you might want to try a full-spectrum UV light.

Peter


    
    
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