If you're needing to treat a deficiency, you should really consider using a water soluble (liquid) fertilizer. Those granules in your fertilizer will take time to break down, meaning you won't be able to deliver the needed dose to the roots. You'd have to wait for the granules to break down and become available, which may not happen early enough to be of any help.

A few good organic, and water soluble, high-N fertilizers include; Alaska fish emulsion, finely ground blood/sea kelp meal, seabird & bat guanos (make sure the N content is higher than the P & K), worm castings, and more. The guanos and meals oftentimes are a dry product, but very easy to make "tea" with, which works just as well as most liquid fertilizers.

Best of luck to ya! :jointsmile: