Planting Hedge Plants and the General Care of Hedging
With very few exceptions, plants are used for hedging are as tough as old boots. They have to be; they are generally planted in the poor soil around the edge of a garden, they are splashed with road salt, used as markers by dogs, hacked back several times a year just when they are getting into their stride and so on. Hedge are often not weeded for years, and watered and fed even less frequently. It is a hard life being a hedge plant.
So it is pretty hard to go badly wrong when planting hedging. You average hawthorn will not be able to believe its luck if it gets a bit of organic matter as a mulch. So let common sense prevail, and your plants will pay you back many times over.
Having said which, there are a few general tips and pointers which might be helpful.