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It sounds like I missed a great talk. I spray compost tea on my garden in mid-summer when everything is looking a little tired and stressed. I just wish there was a human vitamin spray.~~Dee

I love the idea of Jeff making a video. Brilliant ! I know tons of passionate home gardeners and professional growers (mainly cut flowers). I bet 80% -90% would be thrilled to watch it and then apply the methods. You have my vote!

Just as an aside, I find his comment about mycorrhizal fungi interesting for a couple of reasons. First, a classmate in my propagation class last year did an experiment comparing the effects of different kinds of mycorrhizae on three different plants (including a control set) and the results were decidedly mixed. Second, when I was touring nurseries in Oregon last October with the IPPS group, we visited one nursery where the owner raved about the effects that mycorrhizae had had on his plants. The next day we went to a different nursery that grew pretty much the same plants in the same conditions and seemed to be just as successful, yet that owner said they hadn't found mycorrhizae to be particularly advantageous so they didn't bother with them. I think it's easy enough to demonstrate that for some plants they can make a significant difference, but I'm guessing that mycorrhizae could become the next over-hyped garden retail product, much as natives are now being over-hyped.

I would love, love, love Jeff on video! I've heard him speak and he is, as you witnessed, inspirational, knowledgeable and funny. He shared so much great information but, unfortunately, my brain could only hold so much and I'm sure I didn't absorb it all. (Reminds me of the Gary Larson cartoon where a student asked to be excused from class because his brain was full.) So I'm going back for more. I plan to attend his seminar at either the Northwest Flower & Garden show in Seattle or at Portland's Yard, Garden & Patio show. Or maybe both. I do hope I stop shy of becoming a groupie...

I'm with Claire Splan, above!

Fungi are no different than plants in that some do well in some conditions and others do well in other conditions.

So, if my interpretation of what you said he said, Susan, is correct, you should buy this stuff, spread it all around, and cross your fingers that conditions just happen to be right in your garden, for some of the introduced mycorrhizal species to survive?

Of course, this assumes there aren't enough "native" mycorrhizal species in your garden's soil to begin with - which you would certainly check before applying more - just like doing a soil test before blindly applying more fertilizer, right?

And, why is it we would want to spread non-native mycorrhizal fungi in our garden, anyway? Are they really that much different than non-native plants we might want to add to our garden? What if they gradually migrate into the surrounding woods over the course of hundreds of years, displace the native fungi, and turn the area into a vast moonscape?

This gets back to my previous posts of a few days ago regarding scientific evidence versus anecdotal evidence in the garden.

Once again, until someone can show me peer-reviewed research that shows the addition of mycorrhizal fungi in a typical lawn, landscape and/or garden setting actually enhances some measurable parameter - e.g., pest-resistance, growth rate, fruit yield, etc., this stuff is nothing more than snake-oil in my book!

If you want a list of peer reviews for mycorrhizals as well as other fungi, please find Paul Stamets' Mycelium Running for a definitive view, both over and under.

For evidence, you could fund a study since the big money for these things just is not here around the food web. Soil Foodweb, Inc has some papers listed that could help see the efforts made in this area.

http://www.soilfoodweb.com/04_news/wht_papers.htm

I do not know about you, but I have bought into alot of snake oil over my life and have learned which ones do not support life and in what proportions. Just reading and informing ourselves of the story of the soils with no action is a place to begin. For a long time I was stupified by the barrage of chemical propaganda and could not differentiate very well. This passed with the knowledge of the composting process and the ruination of its active phases. Well-made composts and aerobic compost teas are often too much to understand in a post or two.

Last I noticed, we are well on the way to becoming a moonscape. If we find that we must start somewhere to enliven our soils, whatever soil we are left with, we might start by using what is off the shelf retail. If it is just a ruined lab variety, it will offer food for someone in there and will not survive. Word on reliability gets around:

http://www.mycorrhizae.com/

Keep up with these good starts and watch for the controversy without falling into scientism. Err on the side of life, please.


Mycorrhizae have been very well researched over the last few decades and are something where we can come to some reasonably clear conclusions about. First, commercial formulations are often a waste of time because they're sterile -- poor storage conditions kill spores very, very quickly. Second, the best mycorrhizae for you are usually those that are already in your soil. Third, if you fertilize even moderately well your mycorrhizae will either not associate with your plant or will become parasitic (in conditions of high fertility mycorrhizae suck carbohydrates from the plant without offering anything that the plant can't get for itself).

So what about all the studies that show that adding mycorrhizae are useful? -- and there are lots of them. Most of these studies are done in low fertility highly disturbed soils -- in these conditions there is little doubt that mycorrhizae help. But these conditions are much rarer than one might expect -- and you can be sure that the researchers made sure that they were adding live spores -- not spores stored in poor conditions for months at a time. Generally we find that highly disturbed sites naturally reacquire those mycorrhizae that they can handle within a few months of being disturbed.

There's a guy in Colorado -- Curt Swift, who does a talk about these fungi -- I'm not sure if he's on the web or not....

If you are going to study microbes, you HAVE to have a sense of humor, or you will go stark, raving mad (and not in the comic way, but painfully mentally ill). Trust me on this. Microbes are beautiful, fascinating, complex, frustrating, wonderful creatures. I wouldn't give up my years with microbes for anything. But remember that white coats are nothing but straitjackets with shorter sleeves.

I must be spending too much time with my own compost pile. I knew about the value of mycorrhizae but never saw it on the garden center shelf. So many things to keep up with! I get dizzy, but I'll persevere. Right now I'm reading Jeff Gillman's book.

If you build good soil with compost and tend your garden with natural methods, your soil microbes should be fine. Does it really need to be more complicated than that?

I am embarrassed by all the fuss! Thanks for the nice comments on the talk and Teaming WIth Microbes.

As for the negative comments about mycorrhizal fungi, think about what you are saying before you write, please....there are too many studies to list that show they work when they are needed. And if you have been killing them off with the chemical way of gardening, rototilling and compacting soils, you need them....if not, you don't. Isn't if funny how people will take a nursery's word about them when they say they don't work...did you check to see if they were using them properly...ie ensuring that they hit the roots within 24 hours of getting wet? DId you check to see if they were using spores or just pieces of cut up fungi? Was the questioning nursery using chemical fertilizers over 10-10-10? Snake oil? Give me a break...ever hear about how they established pines in Puerto Rico after trying for years? They introduced fungi....Snake oil....really, some people can be so negative and nasty....these folks can't be gardeners....gardeners would never be nasty.

I have been on the road, but will try and remember to address some of the other points made over the past month and a half while I have been trying to get people off chemicals...something they really don't have a right to use as it negatively impacts the rest of us. Some nerve! BUT I DON'T WANT TO BE NASTY\\CHEERS, JEFF L

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