Nice haul! 1. Echinopsis ancistrophora/lobivia arachnacantha i guess 2. definitely melocactus but not matanzanus. Maybe neryii or warasii 3. Echinopsis/lobivia. Post it when it flowers 4. Mammillaria, could me many things... karwinskiana, compressa, magnimamma.... 5. An echinocereus. Not sure which ...

That's an euphorbia resinifera and what's happened is called corking. The base turns woody with age and it's completely normal

Reminds me of stenopleurum

1. Is a notocactus, most probably uebelmannianus
2. Gymnocalycium pflanzii (saglionis is generally more spiny)
3. I guess you are correct
4. Mammillaria of the elegans bunch
The first two could take some excess water i guess but you want to plant them in a fast draining mix

Most of these are here: http://cactiguide.com/forum/viewtopic.php?f=3&t=39213 i'm gonna try my hand at identification: 1. Gymnocalycium anisitii 2. Echinopsis, most probably eyriesii/oxygona 3. Mammillaria vetula fragilis 4. Mammillaria, i have it but no idea what it is 5. Cereus monstrose 6. Ma...

In your last post, the branching one is trichocereus terscheckii or one of the very closely related species/subspecies and the second is pachycereus pringlei - though i've never seen one so blue and with little spines. Maybe the lack of spines makes it receive more sun and become bluer

Rachel.

DaveW wrote: ↑Sun Feb 17, 2019 10:23 am Surprised they were selling such small plants commercially

I posted these photos before and i'll post them again. These were sold in 8.5cm pots with their cotyledon still present. They can't be older than a year:

It's euphorbia milii or one of its hybrids. It's known here as crown of christ

Rachel.

Reminds me of melanostele too

Rachel.

Most likely echinocereus pentalophus

Rachel.

What about using rich potting soil with porous clay? Seems to me you get the best of both worlds

Rachel.

It looks like a beautiful garden. Can you please post more photos?

I was waiting for someone to ID this. Now i can add it to my wanted list. Love those spines

If you get flowers or buds on your plants you are usually doing everything right. There looks to be an awful lot of tubercles on that plant for 1cm (less than half an inch) in diameter and 1.5cm (under 3/4 inch) tall. Mammillaria tubercles are usually about 1cm apart? For a sense of scale, these ar...

This is what i'm talking about. 2 of the 3 tiny seedlings in this pot have buds. The plant (without spines) is around 1cm in diameter and 1.5cm tall. I know the big flowers are fake, i'm only wondering if it's usual for seedlings to flower that small or it's the results of too much fertilizer, water...