In article , Franz Heymann notfranz.
writes


That is an urban legend. If there were any truth in it, all plants
planted in the open ground, which is an infinite sized pot for
practical purposes, should fail.

Up to a point, Open ground is much fuller with invertebrates, roots of
other plants etc

I planted a very young Acer palmatum atropurpureum directly in a 45 cm
pot about eight years ago and have never repotted it. It thrives.

I think there's no problem with things that grow fairly quickly to fill
the pot (even if its just the roots that fill it). It takes at least a
year to get smelly compacted soil.
--
Kay
"Do not insult the crocodile until you have crossed the river"