After flowering Nutrients

After the first 3 - 4 weeks of flowering. What is a good nutrient rotation. I know the numbers below are pretty much pulled out of my ass, but if anyone can tell me a good nutrient number for a good yield.

20-10-10
15-5-20
0-20-10

How about this?

One part 20-10-10 to
one part 15-5-20 to
one part 0-20-10

That'll get you a mix of roughly

11-11-13,

Alternate this with

0-20-10

each week

SO, one week, 11-11-13,

then 0-20-10 the next week

which is basically on par what you get with most major nutrient feeding programs after all the additives and amendments.

Good luck!