What are the best sources of organic potassium for grape production?
What are the best sources of organic potassium for grape production. It is for a five acre vineyard. I am interested in foliar and granular application options.
See following article on Potassium fertilizers by Daniel Kaiser, Extension Soil Fertility Specialist, at the University of Minnesota. His contact information is at the end of the article.
There are many potassium fertilizers available for use in organic production. You can find some that are OMRI-listed by going to the OMRI website:
Hope this helps!