How to clean lawn feed off a patio

[Rupster]

I recently spread some lawn feed granules on our lawn, but some fell on our patio and have stained it brown.

Can anyone recommend anything for cleaning it off?

Thanks.

You could tray a rust stain remover. Something like ...
www.ltp-online.co.uk/prod/ltp-rust-stain-remover
Obvious try on a small Inconspicuous area first

Is the patio in the sun? The sun bleaches out most things..

Thanks for your replies.

Yes, the patio does see the sun, so I guess it will eventually fade, but I'd prefer to remove it sooner.