I Can’t Find The Recommended Fertilizer Formulas, What Do I Do?

Q.  I’ve asked the co-op about 34-0-0.  They told me I have to have a farming licence to buy it.   I ran around to the nurseries and they acted like they didn’t know what I was talking about.  I’m going to try a local farmer and maybe I can buy it from him. Home Depot has a ? 24-3-3?  something like that. Is that close enough?  And no one has 16-16-16. Do I need to order that on line?
 
A.  If you have to use something other than 34-0-0, be sure to look carefully at the bag, and ask if necessary.  You want ammonium nitrate or ammonium sulfate as the source compound for your nitrogen, if possible.
 
Also, be VERY careful about using lawn fertilizer (24-3-3, etc.)  Much of the time lawn fertilizer is sold as a “Weed & Feed” blend, which has a broad-leaf killer in it.  If you get this in your garden it will kill your plants quickly.
 
I’ve never seen a situation where you can’t find a mix of npk that is somewhere between 10 and 20% of each.  And most of the time they are equal.  So, 10-10-10, 13-13-13, 15-15-15, 16-16-16, or 20-20-20 will all work.  And if you could find any with a 2-1-2 ratio that is better still.
 
If you have really looked and there are none of those available, write and tell me exactly what IS available, and we’ll help you figure a way to use combinations of other things you CAN get.