I have read that its a good idea to repeat planting a plant in a planting sheme to give some form of harmony. Can you describe how to achieve this and suggest hardy plants for a neat but not too formal or informal beautinful evergreen and varigated mixed hedge of year round intrest to provide height for privacy for a squarish suburban garden that 69ft llong and 4o ft wide that is overlooked by neighbours on two sides.
More on this at: https://gardenie.wpengine.com/gerrycategory/garden-space/?id=5505
Repeat planting or mixed planting of a hedge is not always a great idea, because different hedging species grow at different rates and the result can be very messy.
An old-style traditional cottage-garden hedge could be created by simply planting a mixum-gatherum selection of species: hebe, privet, hawthorn, holly, cotoneaster etc.