Deciduous trees lose their leaves in winter, so if you require your tree to provide screening through the winter, a deciduous tree may not be the right choice. However, it is important to bear in mind that in choosing an evergreen tree, you are normally sacrificing the gorgeous seasonality a deciduous tree offers -many varieties offering both spring blossom and fiery autumn colours. So think carefully: is it really critical that your tree provides a sedate green screen year round, or just during the summer months, when you spend extended time in the garden? Is this tree to be a focal point, so ideally highly ornamental? Or a structural element, providing a foil for other more showy plants in the garden? A final thing to consider is that deciduous trees are often (though not always) faster growing than evergreens, so an ornamental evergreen can often cost two to three times more than a deciduous tree of the same size.