Minecraft wood farm is not working, please for

My wood farm works perfectly for oak wood, but unfortunately other tree types do not work! They don't grow. Does anyone have any ideas about what I can do and why? What could I change to make it work?

I'm already amazed that oaks are growing. Oak trees, like all other trees, need space to grow. If they don't have that, then they don't grow. The oak tree, however, is the oldest tree in Minecraft. So I could imagine that the word space doesn't play a big role in its programming. It is just a guess.

So then only oaks work…

All trees grow differently, only birch grows similar to oak, but not quite the same.

How could I make more space? This farm always works in Youtube videos, but this is almost always only demonstrated with oak. An automatic farm requires 5 pistons, a dispenser and an observer - this means that 2 directions are already blocked. And the wood is pushed away - third direction blocked.

Any ideas?

And why doesn't it grow here?

Nope. You could download mods that do similar things. Such as. Convince villagers to farm

Because there's probably not enough space for it.
You must live with oak…

I play on a server, mod usage is not possible.

I would like to build it so that all the trees work. Don't you think that can be done?

Well, if necessary, I farm oak without end and then exchange it, but I would rather like to be able to produce everything.

What should a birch farm look like? Find nothing about this on the Internet!

Believe that they changed in 1.15 I heard ma

You were right. I have now converted it to double pistons, now oak and birch work - unfortunately spruce still does not work.

Cool.