We rarely spray anything without a little premix in a five gallon bucket.  Some of the typical additions are iron sulfate, manganese sulfate, zinc sulfate, ammonium sulfate, calcium nitrate, potassium nitrate, mono potassium phosphate, and a product called UFLEXX.  To these, we always add some other ingredients to get the final mix we are looking for.

There are many phenomenal products that are ready to go in a 2.5 gallon jug.  They already contain a good ratio of N-P-K plus additions like amino acids, kelps, and minors like iron, boron, copper, and magnesium.  Of course, all that convenience comes with a price tag that we've decided to avoid a majority of the time.

The trade off is some labor intensive mixing that takes patience and time.  It also tends to ruin clothes and cheap drills.  However, the greens are very happy with what we've been doing.  We have dense turf, little thatch, and a few more inches of roots than before.   

Someday, we might trade in the iron stained drill for a fancy mix tank or even build one in-house.  I would certainly enjoy that luxury and it would make for a good blog post.  Until then, we will continue to shuttle five gallon buckets filled with hot water out of the shop and towards the fertilizer storage area.

Maintenance tip:  If you happen to be working with the same strategy, here is a tip that might help with the process.  The UFLEXX fertilizer is sometimes contaminated with a few prills of Polyon.  These do not break down and will clog a nozzle as soon as they leave the boom.  We now pour all of our granular-turned-liquid products through a tea towel to catch any solids.  Jan, our mechanic, brought in an old one she used for dishes and it has been a very useful time saver.