Out of scientific curiosity, I obtained some biological growth stimulant products to see if they do indeed provide a growth response. I obtained 3 products from JH Biotech, Inc(www.jhbiotech.com);
- Promot MZM, an organic starter fertilizer but which also contained fermentation by-products of a fungal fermentation process;
- Superzyme, a biological growth factor with various bacteria and fungi and;
- Mycormax, a mixture of several mycorrhizae.
Previous research has shown that the addition of mycorrhizae fungi can result in a growth response on potatoes in Kern County, especially if the field has be previously fumigated. I had very little experience with other growth stimulants but have seen them work in past experiments.
View the trial document here.