每日吃瓜

I'm a beginner, but I'm looking, to make my first successful Bosai, from a twig, from a dear passed friends tree.
I have two choices, from a conifer and a deciduous.
I've read it can be done, but, their examples, seem to show the cuttings come from smaller trees.
Can a twig, from a grown tree, be propagated?.
TY, so much in advance.

Yes and no. Depends on what species.

and of the time in the year
and the knowledge of the gardener

One other factor is pretty much random chance. Some seeds grow; some don't. Some cuttings root; some don't. Skill will improve the odds, but there is practically no guarantee./

If you have access to the trees over time you might want to consider air layering. A little bigger success rate and can give you more mature materials to work with.