Good question,
We went with 58# on March 1
3 gallon of ATS was part of this.
This was rained in a few days later.
1.3” by March 8
Another 58# on March 12
3 gallon of ATS was part of this.
.2” on March 15 
This was washed off of the leaves a few days later.
Looks like it will be rained in next week.
Plenty thick with plenty of tillers.
We are skipping the Palisade.
Thinking that we waited long enough to somewhat limit the stem/straw growth.
3 varieties, I wonder about 2 of them.
In 3 months I will have the correct answer to your question.