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Originally Posted by RonMartin
Ain't it amazing. Seems like we all agree on the screen issue. Will miracles never cease ;o)
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Only into Bonsai for about 4 years, but I've always used window screening (vinyl, not wire), and my pots drain just fine without repotting for 2 years. I also use a potting mix with more organics in it than many other people (which in theory would lead to more break down in soil, leading to poor drainage), and I still don't have drainage problems.
I learned to do this from the guy who got me into and first taught me about bonsai. He's run a nursery for between 15-20 years, and presumably has been into bonsai for longer than that. He uses window screening as a drainage mesh, which is where i learned to do so. He also uses a much more organic soil than I've ever seen (considerably more than I dare use). It seems that nobody has told his trees that this isn't supposed to work, because he's got some beauties - couldn't have gotten then that way if they weren't healthy, and wouldn't have been healthy if the window screen was insufficient as a drainage mesh.
My two cents, keep the change.
Toby