Blooming cactus - Sulcorebutia langerii

I consider myself super lucky to be able to get this beauty in a regular supermarket. Only two pots were left when I got there. The price was also very good for this size cactus with so many little heads. Maybe it is not a rare or super hard to grow cactus, but I definitely don't see them much in regular sale.
I am still not sure of the name (i bought it without a tag as always), so unless proven otherwise, it will stay as it is :)

Native to Bolivia and often found on higher altitudes. It not a big cactus and instead of growing up, will spread sideways pushing more and more new heads filling up the pot. Since it has a fat taproot it is prone to rot and has to be watered carefully. It also needs dry and cooler winter rest to induce flowers. It will lose some of its size in that time, but the root should store enough water and nutrients to help it survive and start again when it gets warmer in spring.

I wasn't sure what colour the flowers will have, since it has no photo or any leftovers of past blooms. I gotta say that I am very pleasantly surprised! I love yellow flowers in general and most of my cacti have pink or red/orange blooms. I am more than happy to get the yellow one. And boy, it is so intensive and bright!

I bought it in January and repoted it straight away to a bigger pot. I left some room on the sides for it to grow and I was hoping it will be enough for this year. But look, this is the photo I took right after repoting...

...and this is from today. It is already touching the sides!

And this one is gonna be next!

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_{Shot with Nikon D5500 + Sigma 105mm lens
All photos and text are my own.}

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