|I seek a fast growing evergreen screen tree that will grow tall, and is not prone to disease or early death. cupressocyparis leylandii?Sequoia sempervirens? Deodar Cedar?|
|Italian cypress would be suitable plants for the area you describe. They're reasonably litter-free and will grow tall enough to provide a privacy screen with growing too wide. A second suggestion is a row of Thuja (arborvitae). These plants have a tall, narrow growth habit and are relatively maintenance free.
There are also a few shrubs for you to consider:
Cotoneaster is a deciduous or evergreen shrub. C.salicifoluis is evergreen and grows 8-12 feet tall with white flowers and deep red fruit. These shrubs thrive in full sun and well-drained, slightly alkaline soil. Spring planting is best. Its growth rate is moderate to fast.
Euonymus is a popular evergreen or deciduous shrub. E.japonica is an evergreen hedge plant growing 10-15 feet. These shrubs have flowers in the spring and bright seeded berries that ripen from July to frost. It's growth rate is moderate.
Juniper is an evergreen belonging to the Pine family. They are excellent choices for hedges and windbreaks. Common juniper(J.communis) grows to 12 feet and sometimes a good deal higher. It has needlelike leaves and black fruit. It's growth rate is moderate to fast.