Thank you very much for your answer. Thanks to your post I discovered three new trees.
I clicked on google to see the photos and how are these trees. They are beautiful and actually have a lot of benefits for your needs. With your explanations I understand better.
Their low price could help reforest the planet, if we did not cut them and they were still mixed with other different trees, it is very interresing. And do these trees give seeds after or are you still forced to buy them?