Beautiful looks like a Mammillaria what do you use for fertilizer? Larry

I use a general liquid cactus fertilizer from time to time,
or 8-7-6.

Wazungy

Very, very nice! The flower is great, and I really like the body on that one, too!
Does it take very warm temps to get that one to open up? I've got a couple Matucanas that suffer bud blast if the night temps are too low.

This one grew indoors under fluorescent and then sodium vapour lighting where it flowered. The temp gets up to about 30 deg C in the room they grow in. Night time must gradually die to about 23 - 25 deg C

Waz