Emerald Arborvitae or Thuja! You can build a living wall with them, and they pretty much grow straight up rather then out. I would also recommend if you own the fence, growing Virginia creeper on it in the mean time; it grows dense and well, and has amazing fall color!
Leyland Cypress (x Cupressocyparis leylandii)
This tree is known for its dense foliage and is a popular choice for creating a privacy screen. It grows best in full sun to partial shade and in well-drained soil. It's hardy in zones 6-10 and can tolerate drought once established.
GREEN GIANT ARBORVITAE
This hybrid Thuja typically grows 3 feet per year, with some reports circulating of it growing 5 feet in one year! If you need a fast-growing, large, evergreen Arborvitae hedge, Green Giant is a perfect choice.
Outstanding shrubs for privacy include Viburnums, Buckeye, Weigelas, and the taller Hydrangeas. Good medium to large deciduous screening trees include Carolina Silverbell, Kousa Dogwood, and Maples. Grasses and tall perennials make fun, unique hedges, but must be cut down once a year in spring.
The most natural-looking way to create a natural fence line is by creating a wide, mixed border layered from the tallest plants or trees at the outer edge to the shortest ones at the front of the beds. The bushes and lower plants will give you low screening, and the trees will cover up to their mature height.
The “wall” of closely planted trees acts as a sound barrier, dampening noise from the outside. This is an especially nice feature if you live on or near a main road or a highway. Privacy trees don't just block sound from outside your property, they also keep the sound in.
Examples of these are Columnar Norway Spruce, Skyrocket Juniper, Italian Cypress, Incense Cedar, Leyland Cypress, and your common Arborvitae.
Although fences and brick walls can do the trick, adding an extra divider, screen or plant barrier can block your neighbor's two-story view for good. To create your secret retreat, freestanding privacy screens, wood slat partitions and partially enclosed pergolas are effective (and nice to look at).
A fast-growing evergreen thick shrub with glossy green foliage, that produces bronze new growth and blossoms of tiny white fluffy flowers, will enhance and enchant any garden. Perfect as a dense screen or hedge. Once established you can create topiaries of any shape or size. Colour — White. Growth Width — 2m.
For a dense screen, plant them with appropriate spacing, ensuring adequate coverage. For rapid privacy solutions, few plants can rival the Green Giant Arborvitae. Known for its fast growth and dense foliage, this evergreen is perfect for screening out neighbors and undesirable views.
If you've been thinking about putting up green privacy screen plants, spring is the best time of the year to get started. Privacy screen trees planted in the spring of the year will have the whole growing season to get established.
The average cost to plant a tree up to 10' tall is $200 to $700, including the tree. The cost to plant a large mature tree up to 20' tall is $400 to $1,300. Planting a small tree or sapling costs $60 to $300. The cost to plant privacy trees is $750 to $3,000 per 5 trees.
Thuja 'Green Giant' (Arborvitae)
Reaching 40-60 feet high (12-18 meters) and 12-18 feet wide (3.6-5.4 meters), it's ideal for privacy screens and windbreaks. Hardy in USDA zones 5-8, it's adaptable and requires minimal maintenance, making it a popular choice for large-scale landscaping.
Pear trees, willows, sycamores, eucalyptuses, silver maples, and American Oaks commonly drop limbs in windy conditions.