potting

So I have this pine in my yard. It’s on the side of my house and I will be moving before next winter. Now that I’m into bonsai and looking to acquire trees I’m dying to try to dig this up! While I’m new to bonsai I see potential here. Questions.... What kind of pine is this? How wide should...

Hi everyone, this is the first time I've posted here. I recently bought a dwarf blue leaf arctic willow. I know willows require a lot of water compared to many plants. Can I take this need into consideration by using soil that has a very high water retention or is that not enough? I am waiting...

If substrate has suppieor draning to potting soil, than why not use substrate in flour beds and raised gardens instead of potting soil?