
Water absorption through areoles
I have a few cacti, I started collecting them this year. One of my cacti is almost 5ft tall with 4 other ≈3-4ft tall columns growing together with the main one. All columns are as fat and fatter than a soda can.
The rest of my cactus are pretty much all under 3ft.
The big one is in a 1 gallon pot and doesn’t ever seem to care whether it gets watered or not, contrary to all the others.
This prompted me to find out how it can remain so stiff and hydrated when I can’t imagine there’s any soil left for the massive root ball.
I’ve found different discussions on forums about “some” cacti being able to absorb water through the epidermis and others not being able to but it seemed like a lot of guessing.
This linked experiment and my anecdotal evidence leads me to believe that these cacti are also absorbing water through the epidermis, even without a “corky” spine. Does anyone else have any links to relevant experiments, personal experience/experiments, or other relevant info?