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I-Hop · 06-05-2010, 11:18 PM

So, since my hops are starting to take off, I decided to build a trellis for them to climb. After the fact, I started wondering if the chemicals in the pressure treated wood would affect the hops. I imagine this stuff is toxic but not sure if it would have an effect on the hops that climb it. Does anyone have any input on this??

Thanks.

**uechikid** · 06-06-2010, 12:29 AM

I don't think the chemicals (copper green, Don't know the actual chemical compound) can absorb into the plant. I would make sure the wood has dyed before using it.

**eddie** · 06-06-2010, 01:37 AM

I've never heard of the chemicals from the wood getting into the hops. I don't think it's an issue.

**mmb** · 06-07-2010, 06:19 PM

Dunno about hops but it is recommend to NOT use pressure treated wood for raised bed vegetable gardens because of leaching of the chemicals.

**Randar** · 06-07-2010, 07:57 PM

Quote:

Originally Posted by mmb

Dunno about hops but it is recommend to NOT use pressure treated wood for raised bed vegetable gardens because of leaching of the chemicals.

chromated copper arsenate (CCA) is no longer used outside of marine applications, so as long as you don't try to re-purpose or recycle old pressure treated lumber, you should not encounter it.

I believe you are not allowed to use ANY chemically treated lumber if you want to be certified organic, but ACQ, MCQ, and CA treated lumber are not known to contain any toxic chemical according to the EPA last time I had looked into it.

**GilaMinumBeer** · 06-07-2010, 08:04 PM

Quote:

Originally Posted by Randar

chromated copper arsenate (CCA) is no longer used outside of marine applications, so as long as you don't try to re-purpose or recycle old pressure treated lumber, you should not encounter it.

I believe you are not allowed to use ANY chemically treated lumber if you want to be certified organic, but ACQ, MCQ, and CA treated lumber are not known to contain any toxic chemical according to the EPA last time I had looked into it.

+1 and a six.

billc68 · 06-07-2010, 08:18 PM

Quote:

Originally Posted by mmb

Dunno about hops but it is recommend to NOT use pressure treated wood for raised bed vegetable gardens because of leaching of the chemicals.

I understood the reason for this is the preservatives would actually preserve your garden and therefore not grow, but I heard that 15 years ago when I worked in a garden center.

**GilaMinumBeer** · 06-07-2010, 08:43 PM

Quote:

Originally Posted by billc68

I understood the reason for this is the preservatives would actually preserve your garden and therefore not grow, but I heard that 15 years ago when I worked in a garden center.

15 years ago, it was bacause the treatment involved Arsenic.

Now it's a copper compound.

**rhoadsrage** · 06-07-2010, 09:48 PM

I used treated lumber for my hops last year. After 1 year of use it is really faded in color but I haven't noticed any adverse effects. I have also heard of a treated lumber wash that you can put on before treating/staining treated lumber to remove the chemicals from the exterior of the wood. It is supposed to give better adhesion to your top coat. Sorry I don't know the name of it.

jasonsargo · 06-07-2010, 11:32 PM

Quote:

Originally Posted by Randar

chromated copper arsenate (CCA) is no longer used outside of marine applications, so as long as you don't try to re-purpose or recycle old pressure treated lumber, you should not encounter it.

I believe you are not allowed to use ANY chemically treated lumber if you want to be certified organic, but ACQ, MCQ, and CA treated lumber are not known to contain any toxic chemical according to the EPA last time I had looked into it.

Wow. 5+ years ago, when I built my raised bed veggie garden, the Home Depot folks didn't know their heads from their asses about this, so I just stayed away from the green treated lumber. You positive the green stuff today is CCA-free?