Most of the plants are hard to grow and have to have very special environments to survive.
Three of them are almost extinct.
Some do not bloom until they are 3 to 8 years old.
There is one that has only bloomed twice in the US ... when it was, it think, 22 and 38 years old.
:-[ Most grow very slowly.
Anytime you change the environment, soil and natural fertilizer for the plants, the plants themselves change ... that's evolution for ya.
Just like the warning to never spray a fruit tree, if you plan to give the chins the fruit or even the wood. Plants absorb everything they are exposed to in their environment.
Jo Ann