Author Topic: aluminum hole covers  (Read 1626 times)

9thwonder

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aluminum hole covers
« on: June 14, 2010, 05:13 AM »
will using aluminum mesh, for hole covers, eventually kill the bonsai? i know aluminum doesnt rust, but it does corrode and can that be poisonous to the roots of the tree? now that i actually thought about it, i see that the covers are usually nylon or plastic...
 

bwaynef

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Re: aluminum hole covers
« Reply #1 on: June 14, 2010, 08:03 AM »
While there are many things used to keep the soil from running out bottom of the pot, if you can already think of negatives for what you have in mind to use then you might as well get a piece of plastic sheeting that you can cut into pieces.  Its cheap, has served many folks well for a while, ...and did I mention its cheap?

I've heard of folks giving drywall mesh less than stellar reviews.  I'm not sure I've heard of folks using aluminum mesh though, so I won't report on how it does.
 

rockm

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Re: aluminum hole covers
« Reply #2 on: June 14, 2010, 08:52 AM »
The problem with aluminum screening isn't so much that it's potentially chemically reactive with acidic soil and fertlizer, as it is one of structural soundness. I used some once when I ran out of plastic screens. After six months or so, it gave way under the weight of the soil. I think it was also weakened by the acidic content too. Apparently there is evidence that corroding aluminum can harm plant roots too:

http://www.elmhurst.edu/~chm/vchembook/196soil.html