First grass cut: cut 3/4 of length rather than 1/4 of length :(

So, my lawn which was seeded last October was looking nice (thanks to the advice of you guys, cheers!) and the warm weather up Northwest of England meant it was time to give it's first cut, hubby offered to do and I explained I read you supposed to cut 1/4, the grass was 8cm so I should be left with 6cm or so but accidentally he cut 3/4 and grass is now only 2cm!

What happens now? Is my grass going to die no matter waht? Is there anything I could do to fix this? Any product? Should I add some liquid feed? Bone meal? How to save my grass?

Thanks

 

Leave alone and keep off it , no feed its too early in the season you will do more harm than good
It will soon bounce back