Seamungus Fertiliser

Hi Everyone.

I put sown a whole bag of seamungos on my buffalo turf today its the plant variety as its all I could get. I just picked up handfuls and chucked it etc then watered it in pretty good rain is expected tomorrow also should I be worried about it burning my turf? I only fertilised the lawn about 3 weeks ago with Shirley 17 also so I'm assuming I have enough fertiliser now for 2 months or so?

I'm trying to go organic now instead of synthetic my soil ph is about 7 so I want to keep it there.

Thanks