Dry-stall vs Horticultural pumice ... was algae and moss in seedling pots

Ken kjblack@pacbell.net
Thu, 02 Feb 2012 09:00:38 PST
my oldest set ...  at 13 years ... is beginning to show some definite photo-degradation but still in use.  However, it was clearly not as well-made as later models / subsequent purchases which range in age from 1-10 years and show little degradation.  Still ... I use those oldest shelves at the ground level, to provide proper spacing for the legs.  The oldest shelves lost a few cross-teeth and probably will not support much weight as well ... thus the ground level.  The newer sets are still not industrial/commercial-strength, but at a relatively cheap 25-45 US$ per set of 5 shelves, depending on width ... I prefer the wider (24"/60cm) shelving ... they are more than adequate for my usage and probably 1/4 the price of those heavy black plastic shelving units I've seen in nurseries.   I hand-cut some legs in half, so I can interlock the units which I think provides additional stability over a stand-alone unit.   I am at the 33rd parallel ... so
 sun is intense but perhaps not so much as at lower latitudes.  I also have some of the common metal wire shelving ... which rusts and makes disassembly and relocation difficult ... whereas the plastic remains relatively easy to do so.   I've not paid attention to the manufacturer ... but all of mine have been purchased at the Home Depot chain here in the US. 

San Diego, California  USDA zone 10

--- On Thu, 2/2/12, Ceridwen Lloyd <ceridwen@internode.on.net> wrote:

Those modular plastic seedling racks ... Do you have a problem with them photo-degrading (California sunshine is presumably as harsh as Australian) or are they cheap enough to replace every one or two years?
I have found that metal greenhouse/shade house benches (of any quality) are expensive enough to cause me pause -

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