I do foliar feed as per Smiling gardener recommendations, on my veggies and perennials.
https://www.smilinggardener.com/sale...c-fertilizers/
Also use TTF for few years now and will be using again. It works. It does not stop or prevent early blight if you garden in same spot year after year as I do on community garden plots but it lets me get very decent yield way before plant succumbs to its problems.
Jon Frank sends series of emails I have found interesting read
https://www.highbrixgardens.com/30-d...ng-plants.html