Author Message
Ken W Wilson
Post     Subject: Mushrooms near treated wood fence

Thanks guys. I will plant them as far from the fence as I can while using it for some shade. I will have a lot of shade in 5-10 years but don't want to wait that long. I'm building a double pallet compost pile tonight. That should some shade for one side of one patch.

If I end up with many mushrooms very close to the fence, I will get some tested.
Bryant RedHawk
Post     Subject: Mushrooms near treated wood fence

hau Ken, very good questions.

First thing to remember is that even though there is no arsenic in the newer treated woods, there is still quite a lot of copper sulfate in even the non-ground contact products.
Now, knowing this, the question of will it harm your mushrooms, the answer is not really clear cut since you did mention that this is not "new  wood"  
The short answer would be YES, however this answer would be for those who aren't able or willing to do some research on their own. Or they may be from the "all chemicals are bad and so should be avoided" crowd.

The best way to tell would be to take soil samples and have them tested for cupric sulfate quantities, this will give you a definitive answer to go forth from.
It is also good to remember that all organic things are made up of chemicals and minerals. These are the building blocks of life.
Issues arise when there is too much of a good thing or there are things that are downright dangerous to living organisms present.
For example growing food in soils that are rich in things like lead, mercury, uranium, etc., might be wise to avoid at all costs.

In my opinion, I would do as John mentions he did and give some extra space to the fence, no need in taking unnecessary risks after all.

The Stropharia rugoso annulata is a good mushroom for mitigation of sulfates, the hyphae will, over time, take in the sulfates and break them down, making the components of these compounds available to other organisms for incorporation or further break down.

You are correct in thinking that vinyl chloride compounds are worse. It is also correct to think that most of the leaching from the current fence is probably over at the ten year old mark.

So, if you are worried, do a soil test and if you aren't really worried, make close and frequent observations and maybe have a few mushrooms tested for "bad" compounds.
This way you will not put yourself in a straight jacket. I would expect a soil test to show some leachate present but probably not in harmful quantities inside the mushrooms.

It is always best to err on the side of caution when talking about things you want to ingest.

John Suavecito
Post     Subject: Mushrooms near treated wood fence

These are great questions.  I planted my cherry tree a few feet farther away from a telephone pole than originally because I was worried about the chemicals.  They do like at least part shade. I had a patch that was in full sun. It dried out and died. You could try a living fence/hedge at that point to save the patch.
John S
Ken W Wilson
Post     Subject: Mushrooms near treated wood fence

I'm planting Stropharia rugoso annulata and at least 3 kinds of morels in my yard this year.  My trees are still small and shady places are limited. Can I plant mushrooms near a treated wood fence? How near? It's 10-12 years old. It's the newer treated wood without arsenic. I believe the chemicals in it are already found in the human body. Will the copper hurt the mycelium?  Will enough chemicals get in the mushrooms to be a health hazard?

Anyone know how much shade these mushrooms need? I haven't found any specifics on that.

I've thought about replacing the fence, but I'm not convinced that the chemicals in vinyl fence are any safer. Also, it seems likely that the chemicals that can leach out of my wood fence already have, do to it's age. Cedar doesn't last long enough to justify the expense. It's around 150' of fence.

I keep the roots of my plants and trees far enough away that they shouldn't be picking up anything bad.