Posted: 19/09/2012 at 12:59
Adam, How big is your garden? You do realise trees put out roots a long way underground and can undermine walls etc, also trees do not grow to a set height then stop they also spread as well as grow up. They will also suck your garden dry of water so nothing much will grow in their area. If we are talking a large field and not a normal sized garden then it is possible.
How much privacy are we talking about and could it be done in a much easier way say a canopy or summer house? A slightly raised fence near the house?
Right, Carpinus or Hornbeam can grow to 80 feet high and 70 feet spread, they need sun well drained soil and spread winged seeds all over.
Crataegus or Hawthorn are the hedge rows you see on country roads, it can grow 25 feet high and spread even more. White flowers in may loses its leaves in Autumn.
Magnolia a lovely shrub slow growing and often used on walls can grow to in time to 15 feet and spread the same, frost can damage the early blooms.
Sorbus grow to 20 feet with a spread of 15 feet produce white flowers in spring and berries in Autumn.
Ligustrum is for hedging and can grow to 6-10 feet high with 6 feet spread.
Pyrus is a pear tree and can be contained with pruning it is deciduous, (loses its leaves in winter but you will get fruit in time.
I am not trying to rain on your parade but a tree is for life and if not contained can cause damage or problems with shade in a neighbours garden, they do move on and problems do arise with new neighbours. That is the reason I ask apart from most normal gardens will only have room for one or two trees, hedges need a lot of care and maintenance and roots from time to time need to be cropped if near property.
Hope this will help.