Anna, I was waiting to see if anyone else had answered your question. I am afraid that I am not of much help since I don't purchase fertilizer for my
lawn. Not even hay. My ducks, geese and turkeys wander across different areas from time to time (and
poop) and there are a large variety of plants growing in my lawn and I am adding more different plants all of the time.
Dandelions, oxalis, chickweed, purslane, crabgrass, millet, oats - just what ever will grow.
For pictures of my 'lawn' check out my link at the bottom called 'projects'. Sorry I could not be of more help with this question.