I've never known a laurel that needed any encouragement. Be careful what you wish for.
Well I am trying to grow a nice thick hedge with them, right near to a mature oak tree, so anything I can give to them to encourage growth is very welcome!
Water and lots of it.
They will grow when the growing season starts, thats when it warms up a bit, planted these about 3 years ago, poor ground just a bit of compost in the bottom, keep the tops pinched out of all shoots, they will soon romp away.
If and I mean if you want to feed it, growmore is more than enough. But best to give it a chance first.