Option B: 1 tree in ground: 1/3 lb (3/4 cup)/ month from Feb-Nov
is a maximum rate.
You could indulge in the extra labor of fertilizing every watering, but it is just fine to apply once per month. I don't know how many trees you have, but consider putting the dose for 1 tree in a 5 gallon bucket, filling it with water, and then pour that around the tree.
The constant feeding dosage is for folks with a fertilizer injector. It siphons concentrate from a 5 to 100 gallon or more tank and feeds the tree a very dillute amount every watering. Siphon mixers are also available for garden hoses. Here's the set up I have at my small nursery for the 4 different formulas that I use: