I am inth eprocess of building some raised beds for next year. I will
be using the plastic lumber or Trex, whichever is cheaper. I used
Trex whenever it first came out years ago to use as a border instead
of that cheap plastic stuff that comes in a roll. It is still as
perfect today as it was all those years ago, albeit a little washed
out looking since it has been sitting in the sun for years.

This stuff is made from recycled milk jogs and sawdust. You just need
to use a few more posts as this stuff bends quite a bit. Once in
place, it needs stiffened. On the plus side, you can use it to make
all sorts of shapes and such in the garden.





On Aug 27, 12:40*pm, geronimo wrote:
For square foot gardening, I was thinking it might be cheaper to use
landscaping timbers that have two flat sides, drill holes near the
ends with two of them stacked, and then drive 1 in. *EMT conduit into
the holes to fix them into position---- like I have seen done with
raised flowerbeds. Untreated wood would probably rot in a short time.
But what about growing veggies? What are the chances that toxins could
get into the vegetables from the lumber if it's treated? Has someone
actually tested to see if arsenic leaches out and gets taken into the
plants?