Rebutia fulviseta

While I was going through my eBay binge, I became enamored with the genus Rebutia and Sulcorebutia for their crazy thorns, moundy growth habit (I like moundy things), and GORGEOUS flowers.  I'm currently enjoying the flowers of Rebutia fulviseta.

There are more buds on this cactus, and I'm hoping that I'll get an awesome cluster of flowers blooming at once rather than this single flower which is nice but who wouldn't want more?

From what I've read online, I am dangerously likely to kill this cactus with water, and apparently a lot of people do just that.  I made the potting mix very coarse with lots of rocks, sand, perlite, decomposed granite, etc. with a thin matrix of coconut coir and some fertilizer.  I also hedged my bets with a terracotta pot just in case.

For the record, you can find this plant from sources other than eBay, but there is a dizzying array of this genus available on eBay.  I could easily have continued to buy more, but I managed to stop myself because at some point, logic kicked in and I realized I'd never grown any of these plants before.  Still I wound up with 3 Sulcorebutia plants in addition to this single Rebutia, but it could have been worse.  Much worse.