Square Foot Gardening Forum

Hello Guest!
Welcome to the official Square Foot Gardening Forum.
There's lots to learn here by reading as a guest. However, if you become a member (it's free, ad free and spam-free) you'll have access to our large vermiculite databases, our seed exchange spreadsheets, Mel's Mix calculator, and many more members' pictures in the Gallery. Enjoy.


Display results as :


Rechercher Advanced Search

Latest topics
» Fall garden push
by Cajun Cappy Today at 1:05 pm

» CANADIAN REGION:What are you doing in October 2016
by trolleydriver Today at 12:19 pm

» The Research Journey:Composting Leaves Only
by trolleydriver Today at 11:08 am

» Microbes...you gotta see this one !!!
by jimmy cee Today at 8:45 am

» who has chickens
by bigdogrock Today at 7:30 am

» The Research Journey:Growing in a Raised Wood Chip Organic Gardening Bed
by has55 Today at 7:16 am

» The Research Journey:Building Healthy Soil
by has55 Today at 7:13 am

» the Research Journey:How to Grow Large Healthy Organic Tomatoes
by has55 Today at 7:07 am

» The Research Journey:Back to Eden Organic Gardening 101 Method with Wood Chips VS Leaves Composting Garden Soil
by has55 Today at 7:03 am

» Sanderson's experiments with Bio-Flora Ag Products
by sanderson Today at 3:53 am

» Bountea Compost Tea - Got it!!!
by sanderson Today at 3:23 am

» Northern California & Coastal Valleys - What are you doing this month?
by sanderson Today at 1:28 am

» Straw Bales with Seeds?
by donnainzone5 Yesterday at 11:50 pm

» Second Year SFG in Canada
by sanderson Yesterday at 11:08 pm

» TrolleyDriver's Compost Thermometer
by jimmy cee Yesterday at 10:44 pm

» Notice: Gluten-free Recipes Sub-Forum- Up and running!
by BeetlesPerSqFt Yesterday at 9:20 pm

» Our Newest Regional Hosts!
by Scorpio Rising Yesterday at 8:56 pm

» Indian Solar Gardening Calendar
by Scorpio Rising Yesterday at 8:52 pm

» N&C Midwest: October Happenings!
by Scorpio Rising Yesterday at 8:40 pm

» Asia Region -Showcase of Gardens - Show Us Yours
by rajmahendra Yesterday at 8:36 pm

» California's Drought
by countrynaturals Yesterday at 1:23 pm

» Fun Spider addition to Home Page
by sanderson Yesterday at 12:56 pm

» last chance to pre-order baker seeds-rare seed catalog
by sanderson Yesterday at 12:48 pm

» Senseless Banter...
by AtlantaMarie Yesterday at 7:37 am

» Mason bees
by Scorpio Rising 10/23/2016, 8:45 pm

» 2016 SFG in Brooks, Ga
by yolos 10/23/2016, 8:05 pm

» Hello from central Massachusetts!
by Scorpio Rising 10/22/2016, 10:39 pm

» What's eating my plants
by donnainzone5 10/22/2016, 12:30 pm

» Shallots, Prisma
by AtlantaMarie 10/22/2016, 7:59 am

» Peas and cucumbers: Trellis position and plant spacing
by yolos 10/21/2016, 8:32 pm


Search SFG Forum

Using Pressure Treated Wood

View previous topic View next topic Go down

Using Pressure Treated Wood

Post  Unmutual on 7/19/2011, 12:38 pm

I was doing some research on wood types and came across a relatively new type of PT, MicroPro. It's gone through some tests and seems to be okay to use with veggie gardening(though I tend to take everything like this with a grain of salt: ie: I'm waiting another 5 years before I see about Lasic surgery and I never buy a brand new microsoft operating system.). If I still had young kids, I'd probably skip it, but since I'm moving into the 40+ bracket and my daughter is in college, I might take a good look at using this, with some plastic wrapped on the inside and under the wood.

Below is the jist of things:

MicroPro Treated Wood Used in Agricultural Applications

MicroPro (micronized copper quaternary) and (micronized copper azole) treated wood may be used to construct raised bed gardens. The MicroPro treated wood process is certified by Scientific Certification Systems, Inc. (SCS) as an Environmentally Preferable Product (EPP) based on SCS’ Life-Cycle Assessment.
Recommended preservative retentions for MicroPro treated wood products are:

• For MicroPro (micronized copper quaternary) treated wood, the minimum
preservative retention should be 0.34 pcf for ground contact applications.
• For MicroPro (micronized copper azole) treated wood, the minimum preservative
retention should be 0.15 pcf for ground contact applications.

Very small amounts of copper and either quaternary or azole will migrate out of MicroPro treated wood over time. If it is desirable to avoid migration of any amount of copper, quaternary or azole into the soil of a raised bed garden, we recommend that a suitable thin plastic material be used as a barrier between the MicroPro treated wood and the raised bed garden soil.

The use of a plastic barrier will also help keep the raised bed garden soil within the bed area. For proper drainage, the plastic material should not be used underneath the raised bed garden soil.

For additional information on MicroPro treated wood, visit www.osmosewood.com.
April 2009

This is the reply from an email query I sent(the above was an attachment):

Thank you for your email and for your interest in YellaWood brand products.

Yes, YellaWood® brand products are approved for use in applications such as raised vegetable gardens. We would recommend that you use boards that are treated for “Ground Contact” applications since they will be in contact with the soil. You can find this notation on the end tag on each piece of YellaWood® brand products. I've attached a document that should help explain this usage in greater detail for you as well as a project plan to help you get started.


Certified SFG Instructor

Male Posts : 396
Join date : 2011-04-23
Age : 44
Location : Greater New Orleans Area Westbank(Zone 9b)

View user profile

Back to top Go down

Re: Using Pressure Treated Wood

Post  camprn on 7/25/2011, 8:35 am

So, have you decided to go with this product?


Forum Moderator Certified SFG Teacher

Female Posts : 13981
Join date : 2010-03-06
Age : 54
Location : Keene, NH, USA ~ Zone 5a

View user profile http://squarefoot.creatingforum.com/t3574-the-end-of-july-7-week

Back to top Go down

pressure treated tabletop beds

Post  jim4065 on 12/3/2011, 12:00 pm

I built both of my beds entirely out of PT lumber and plywood. After being "scared off" by an "expert" at Lowes (who told me I'd be putting Arsenic in my food), I went to several sites (including Yellawood) and looked into it to the best of my ability. There seems to be no evidence from a credible source of any trace amounts of copper transferring into vegetables from soil which was in contact with pressure treated wood. Since I wear a copper bracelet (which also has unsubstantiated effects) I figured I could simply quit wearing it and get less copper in my system than I'm deliberately adding now. Then - in a bow to a family member who falls down and twitches when PT wood is mentioned - I lined both boxes with "plant mesh" (that black plastic fabric stuff). Who knows? Your mileage may vary. Very Happy


Male Posts : 7
Join date : 2011-11-16
Location : Central Arkansas

View user profile

Back to top Go down

Re: Using Pressure Treated Wood

Post  Unmutual on 12/3/2011, 12:27 pm

I ended up going with cinder blocks for the permanent beds. They're easier to transport in my car than 8 foot pieces of wood. However, from what I understand, there is currently no pressure treated wood on the market(unless you get some from a really old house) that can kill you outright. The old arsenic stuff has been off the market for many years(I've read somewhere that it was around 1980, and other places as recent as 2003) and the ammonium/copper stuff(ACQ), which is most commonly used, won't cause you to ingest arsenic.

Arsenic is formed when you smelt copper, so I wouldn't recommend burning treated wood.

For the record, I really do hate the internet when I'm researching things. It's a boon and a bane for reliable information.

While attending an edible garden symposium given by the LSU AgCenter, someone asked the question about using PT lumber. The speaker(from the AgCenter) said she uses it all the time and that it's fine to use.

If I liked the look of PT lumber, or could find a safe paint that will hold up in the weather, I'd have probably gone with PT lumber in the end.


Certified SFG Instructor

Male Posts : 396
Join date : 2011-04-23
Age : 44
Location : Greater New Orleans Area Westbank(Zone 9b)

View user profile

Back to top Go down

Re: Using Pressure Treated Wood

Post  dsfin on 12/4/2011, 2:01 pm

@Unmutual, you might want to check if this particular brand of pressure treated wood is approved material for use with growing "certified" organic veggies. If it's a rather new product, it may or may not be listed yet by any of the organic regulatory agencies (e.g. NOP).

That would be a good indicator for whether it's safe to use for SFG boxes!!


Male Posts : 51
Join date : 2011-03-10
Age : 59
Location : Milton, WA; PNW - Zone 7-9

View user profile

Back to top Go down

Re: Using Pressure Treated Wood

Post  Sponsored content Today at 1:31 pm

Sponsored content

Back to top Go down

View previous topic View next topic Back to top

Permissions in this forum:
You cannot reply to topics in this forum