Trichocereus seedlings

Information

Trichocereus are tall, fast-growing columnar cacti. Most with lovely sharp spines. Very showy flowers are scattered up and down the plant. 

These are one of the easiest cacti to grow, because they take a lot of abuse.  They are generally cold hardy, down to -10°

I have read that they seem to enjoy having their heads cut off, that they bounce back quickly and that it actually toughens them up.

These are a mix of named varieties, but I cannot see any differences in them, yet.  They include Andy Blue, Martin, Knuth, Bob crosses.