Because they are not living organisms.
They cannot grow on a rock but will grow among rocks Moss however will grow quite happily on rocks.
Their roots grow and expand to create pressure that wedges rocks apart.
Will a plant grow better if it has rocks around it or just with soil?
Plnats grow on rocks like lichens and mosses.
bk
They can not grow more
yes they do
To grow orchids in a glass you will need: moss, sheet rocks, chopsticks, orchid fertilizer, and river rocks. Moisten the moss, add fertilizer, then sheet rocks.
plant roots grow into cracks in rocks
They can not grow more
cracks open wider
no i dont think