Looks like Gymnocalycium quehlianum. But I think it is better to wait blooming and check with flowers.

First ones are G.friedrichii and G.anisitsii.

Mrs.Green wrote: ↑Thu Sep 02, 2021 2:43 pm Very nice plants and photos!

Thank you

It is 16°С outside. So, I think that growing season is ending
A few cacti (two S.mirabilis and one T.swobodae) have buds and looks like they will not grow to flowers.

Some photos of this summer: https://sun9-68.userapi.com/impg/iwzo_8HVdFVjnutOxu8BMpgYTI5tNIg3k_p5GQ/VjLW618ZS_s.jpg?size=701x1080&quality=96&sign=e4f7a5f78e8a6825fd861fcb1f95e624&type=album https://sun9-83.userapi.com/impg/eIhA9x_8tE7a9PXhg0LH_EK_7_CIVzXUeC2ORA/DvMsfx0WRp4.jpg?size=807x1...

Mammillaria was blooming last autumn-winter. But it is blooming in summer time this year for some reason.

Blooming of Echinopsis subdenudata https://sun9-34.userapi.com/impg/TIggihSS4xzomFJkUdrTPEA8fubJYZ-3XK99Jw/dznKF7aT4GM.jpg?size=1280x960&quality=96&sign=fa990a30876b119cb4ee1e5be81b48fa&type=album https://sun9-28.userapi.com/impg/K_XLI0C_OqiOqB_UPvcuSAJEvwfEcgl_5eHSVA/cdxXexQqBBw.jpg?siz...

New flowers: Gymnocalycium calochlorum https://sun9-15.userapi.com/impg/97d17L-a9tuK8_N_tg8ZtNSyVQmJwPCLnfJhQA/gBqih4RcahA.jpg?size=910x1080&quality=96&sign=9e5db00233e7347711fdd96910943c3c&type=album https://sun9-52.userapi.com/impg/9K19zzq8zXstS3lmHM4lviKl8nnz9Z9YfN_xMA/xKW8lGkcjeU.jpg...

I have one more question regarding field numbers and selection. Let imagine that someone has a few cacti with one number. Hi or she pollinate these and select subjects with some distinctive features, i.e. longest spines. Is it possible to get some cultivar with really long spines compare to initial ...

#16 Some Thelocactus.

I agree with first ID and I'm not sure regarding second plant. But second plant looks not healthy.

The weather is mainly cloudy today. But Mammillaria haageana opened almost all flowers!

The average temp in my greenhouse is 95 f/ 35c. 10% humidity. I have been watering all my 4" and smaller pots every other day. 6" and larger every 4 to 5 day. Thanks for information. Much more water than my cacti was getting last summer (whole collection)! I don't know regarding humidity,...

Today my Mammillaria surculosa opened three flowers at once.



There is one more bud but very small.

The larger has already bloomed 4 times over the last 14 days. Wow! :o That is amazing! I thought that they bloom a few time per year. What about watering? Is such blooming require constantly watering? I learned about the "don't turn a light on" thing the first night when I turned on the p...

K.W. wrote: ↑Wed Apr 14, 2021 9:07 pm Even though I'm not Mike - yes!

Thanks!

I saw pictures of flowers before I bought them. Look really cool!