Crab Apple problem

Posted this here although may not be a pest,disease etc.
Crab Apple tree which i planted a couple of months ago suddenly has had its leaves go brown from the tips and curl up in some cases.
I've given it a good drenching of water as I wondered if it might be the hot weather.
Have I done the right thing?

 

Yep, its probably dried out if that is the first watering its had.

 

Well we had really wet weather until quite recently, I have watered it in general, it's had a couple of good soakings since. Maybe try feeding it

 

No good feeding it, wait until the roots start moving.
Feeding is not always the best thing to do.

I'm guessing the rootball dried out.