How do I get my soil tested for verticillium wilt causing fungi?
We have questionable soil, lots of clay which we are working to amend. We have lost a vine maple and a bloodgood maple. I am suspecting fungus in the soil. Where can I send a soil sample to have it tested before I plant another susceptible plant?
King County Washington
Hi, I did some checking around, and found that .A&L Labs offers a test for verticillium: http://www.al-labs-west.com/fee-schedule.php?section=Microbiology They are located in Portland, but you will be mailing soil samples. Follow their instructions for taking the samples.
Our Plant and Insect Clinic has used A&L for years and have found them very useful and reliable. Good luck!