Here's this year's update for the seedlings I haven't shown yet, now nearly 2.5 years old. Lots of pictures incoming
Cochemiea macdougallii. (=Ortegocactus)
Copiapoa calderana 'lembckei' KK 70.
Gymnocalycium schickendantzii P 17A. I am really liking the spines.
Back in February I repotted several plants, including some seedlings. Most, like the Gymno above, were unaffected, but some plants did complain. I think I was too heavy-handed with the water during a cooler than normal spring.
Here are some casualties:
Geohintonia mexicana. Survivors and dead seedlings. I am waiting on Pereskiopsis cuttings to be ready so I can graft the survivors.
Frailea cataphracta subsp. duchii CS668.1 334OR. Just before unpotting.
Clean roots. None survived.
Thankfully, those set fruit last year and the seeds I sowed are now working on the next generation themselves. They will be 1 year old in August.
I also repotted my Frailea castanea parent plants, and all 3 died. I am thinking Frailea don't like to be disturbed in the winter, so future repottings will be done in the spring.
More casualties.
Rapicactus booleanus Galeana, NL, Mexico. Pic from February. I was so proud of them with their odd growing habit.
...and a couple months later
Only one seedling survived, and of course it was the smallest one.
I was quite sorry to lose these, but I do have one degrafted plant and one more grafted plant, so I have the material to try again without needing to buy more seed.
in the pic with the dead seedlings, you can see a dead Echinocactus horizonthalonius. I lost two seedlings, but repotted and trimmed off the rotted roots from 3 other seedlings. I think I caught the rot in time to save them.
Similar story with the seedling on the far left:
Mammillaria lasiacantha SB 1063. Unpotted in February.
2 died before I unpotted again. One more I tried to graft, but it failed because the Pereskiopsis was not yet actively growing. The last seedling I cut off the roots and let it be to see if it would root. And to my surprise it actually did. A tiny little thing, not even 1cm in diameter.
This was the most upsetting loss.
Eriosyce villicumensis DJF 362. These were not repotted. Very odd decline. Almost overnight, there was discoloration of the epidermis. If it wasn't overcast at the time, I would have assumed they were sunburned.
The stems were firm. I removed the top dressing to take a peek at the roots. The top of the taproots were all firm, but were an odd pink color and appeared to have bled some red fluid.
after several weeks, the plants shriveled up.
Doubly upsetting is that Mesa Garden just increased the price for these from $3 to $8 for 10 seeds (and believe or not, they're now sold out!)
Not pictured is Aztekium ritteri. The seedlings just kept dying one by one until none were left. Anyway, enough with death and on to more livelier things...
The next two species were hitchhikers that came together with the M. lasiacantha seeds from Mesa Garden.
Mammillaria sp. (aff. karwinskiana?) 2 plants, 1 double-stemmed.
and what I believe to be
Mammillaria spinosissima 'rubrispina'.
and a larger one
Funny how these were sown together and received the exact same care.
I also repotted these in February,
Gymnocalycium spegazzinii 'recii' JO 820. Nice parsnip roots.
Now starting to grow big spines.
Unlike the Rapicactus, these didn't complain!
Kadenicarpus pseudomacrochele subsp. minimus FO 259. Fat roots.
here they are currently
These were untouched.
Frailea mammifera 'atrobella' VoS 08-322.
and their offspring at 1 year old (with grandchildren
)
size comparison between 2 and 1 year old plants
Leuchtenbergia principis 'trachythele'. I think they're due for a repot...
Aylostera pygmaea 'albidula' RH 1098.
Weingartia kargliana M 48. W. neumanniana? Some say it's W. fidana now
You can tell the two above have large taproots because they are pushing out the pot walls that should be square.
I repotted the seedlings and they've recovered now, but no more flowers. 
