I just got off the phone with a very helpful young man at my local Home
Depot. I was gathering info from him on the prices of redwood, cedar and
composite planking that I want to make grow boxes from. When I mentioned
to him that I was going to make grow boxes he suggested that I use
treated lumber, quickly adding, as if he anticipated my protest, there
is no longer any arsenic used in the treating process and nothing is
used that would be harmful.
I would appreciate any thoughts on this. I'm still a bit hesitant about
using treated lumber for grow boxes for vegetables but it would sure
save a lot of money if I could.
What do you think?
supposedly the new treated lumber is safe for indoors construction but not
safe in making cutting boards with,
so if it shouldn't be in your food,
it probably shouldn't be in plants' food
the new treated lumber that is supposedly safe has some kind of copper
chemical in it = is copper bad? you decide (the people who sell it will say
it is safe, but it may not be, puffery is allowed in sales)
the cedar and redwood you mention might be okay for grow boxes
I'd use the "Plastic decking" that's made of recycled milk jugs as it will
outlast all of us combined and contains no preservatives.
Don't use treated lumber of any kind!!!!! The 'safe' stuff is only a
relative term and you don't want to hear in 10 years that there's a
problem. DDT, CCA lumber and tobacco were once thought safe, too!
ACQ (Alkaline Quaternary Copper) is the replacement for CCA (Chrome
Copper Arsenate). It is said to be safer than CCA. That's not saying
much, kinda like a Rattlesnake is safer than a Black Mumba! It's not
rated for food use and only the highest ACQ level is rated for ground
contact. The Quat is a fungicide whichcan't be good for seedlings.
The only untreated wood I know of that's rated for direct contact is
ipe. I don't know if it contains natural oils that might be toxic.
White oak (NOT red oak) will last many years wet and there's nothing
toxic in it. Stay away from nut family woods (hickory, walnut, etc).
You plant a garden so that you're sure the food is good. Don't take a
On Wed, 16 Mar 2005 10:27:42 -0700, Russell D. wrote:
Good day Russell, unsure what type of 'grow boxes' you wish to have or
their size. If these boxes will be more like raised beds, then I would
suggest that you look at stone. The allen block, diamond block type. These
will cost a bit more in the begining, but they will pay for themselves in
the long run for sure.
If your thinking smaller, then I would recommend trex composite. Trex will
again cost a bit more, but will last 15+ years in the ground with no
problems. It's paintable and screw'able.
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