Cactus / horstii

Several grafted Discocactus horstiis were in flower yesterday.
I like this species and sow seeds every year.
The growing speed of own-rooted plant is very slow and I do not have any flowering size plants yet.
When you grafted young seelings, scions will be in flower aroung 3 years old.
The photo is 3 years old one. The scent of flower is very nice.