Bob i heard at a bonsai show lecture, (method also used by Streptocarpus growers ) that if you put a piece of yarn in the pot extending down you not only keep the pot media moist by adding a wick to soak up water from below, but it also lowers the water table in the pot. think- hydro communication with the media below. they recommend a yarn that does not rot, so not cotton but Orlon or some other synthetic yard. Rimmer SE Mich USA Zone 4-5-6 depending on the winter. > On Oct 20, 2015, at 3:10 PM, penstemon <penstemon@Q.com> wrote: > >> I get both Anderson pots and flats from Stuewe and Sons in Oregon and they >> ship in small as well as large amounts. I grow most of by bulbs in these >> pots. I cut a piece of fiberglass window screen and place it at the bottom >> to keep the soil from falling out. Great for drainage and save tons of >> space! > > > Funny, I just ordered some of these http://growers-inc.com/containers-anderson-band-po… > The postage cost more than the tree bands, but since I lost some of my oncocyclus iris seedlings to a perched water table, I thought I would try these. > Putting screen in the bottom, which is, of course, the only way to prevent the growing medium (in my case, perlite) from falling out, will still create a perched water table, but hopefully far enough down in the deep pots to prevent root rot. > Bob Nold > Denver, Colorado, USA > _______________________________________________ > pbs mailing list > pbs@lists.ibiblio.org > http://pacificbulbsociety.org/list.php > http://pacificbulbsociety.org/pbswiki/