Browse Forums Landscape & Garden Design 1 Jun 13, 2015 12:49 pm I need some advice regarding the potential of contamination from a treated pine fence which sits above the soil line behind a raised garden bed. I was hoping to grow fruit trees and veges in this raised bed, so we built the retaining wall out of concrete blocks. I only just now realised that contamination of the soil could also occur from the fence above the wall. Am I just being paranoid, or should I just leave the raised bed to non edible plants ?? and build raised beds for veges elsewhere, away from the fence ? Here is a picture of the garden bed: Like ⋅ Add a comment ⋅ Pin to Ideaboard ⋅ Re: Treated pince fence behind raised garden bed 2Jun 14, 2015 10:31 pm I'd be very surprised if there was any leeching into your soil from the fence as its drawn into the less dense fibers of the pine timber regardless of weather. Millions of meters of fencing throughout Australia & New Zealand have these without any impact on the fruit and veges grown directly beneath or beside these. ______________________ CELERBRATION HOMES The Lennox Re: Treated pince fence behind raised garden bed 3Aug 03, 2015 7:21 pm In addition, oysters are grown on treated pine with 4 or more times the concentration of the treatment. You don't need to worry about leeching once the timber is dry (and yours is). Re: Treated pince fence behind raised garden bed 5Aug 07, 2015 5:25 pm Technicially, yes if its CCA it will leach and has the potential to contaminate the soil and the vegies/trees grown in it. Most research suggests the most susceptible species are root crops such as carrots, potatoes etc. but they have to be growing right next to the wood. Not so much fruit trees. I have fruit trees near CCA posts and i am not concerned at all. If it bothers you or you want to plant root veg in there at some time simply dig a narrow trench against the posts to about 300-400mm depth and put black plastic or root barrier (whatever is non toxic!) in it vertically to seperate the soil near the posts from the veg bed. Old Home Restoration / Renovation Hi, just discovered all these junks left behind under the floor. Could any of these be asbestos? Best to leave as it is or clean up? Thank you for your thoughts 0 8070 Fig Landscapes has produced an e-book and native plant index, available for purchase from their website. It's a great resource, full of inspiration and tips. Another… 1 12254 |