Which order - iron sulphate, autumn feed, scarifying

[Cramlington567]

I applied iron sulphate last week. Lawn went a bit black which I believe is correct (first time I did this).

Next, I have some generic Autumn feed leftover in the garage. Should I apply this too or is this not needed after iron sulphate.

Finally, if I do need to add autumn feed should I do this before or after scarifying?

Thanks

Scarify first and get rid of all the old thatch and dead stuff. Then feed if you think it is necessary. There is still time (just) to throw a few grass seeds onto bare patches as well.