While I don't have a prairie or meadow, I'm doing what I can in my front yard. I'm installing Bluestem (Big & Little), Side Oats Gramma, many flowering plants (asters, goldenrod, culver's root, etc.) and want to esure I do whatever I can to help everything establish before winter. I was going to lay down some super phosphate ferilizer on the soil surface and then mulch over that -- any thougths or suggestions?