I fertilize my containers about once a week or every other week when actively growing. I use a low dosage frequently instead of high doses infrequently. But why are you using a fertilizer with so much Phosphorus? Most of that is just leaching out of the bottom of the pot unused. You would be better off using 20-10-20.

Thanks for the info. I thought I was doing the right thing! Now I think I might be dyslexic! Thanks again.

Lol, 501.

Some herbs do not even need fert. Are the plants mostly annuals or perennials?

The containers are mostly annuals.