Well, the thread is from 2018, 6 years ago.
So far all my trees in steel colanders are doing very well, one BRT that I started from seed in a challenge with
@leatherback is now in the ground with the colander, I will try to take a picture tomorrow, I am pruning it every fortnight.
Fun fact; none of the colanders are rusty even some having been reused more than two or three times.
I am not being stubborn, but it's been working for me, a fact.
PS: I'm retired now so I can water as many times as needed, every day..