Answer: I tend to agree with you - Leyland Cypress will be too large for the area you describe. I have similar concerns for Green Giant. Green Giant arborvitae is a big, fast-growing evergreen that will probably top out at around 60 feet tall but with a basal spread of around 15 to 20 feet. Its fast growth and natural exclamation mark form makes it ideally suited for screening, especially if you are trying to screen a five-story building.
In my opinion, 'Emerald,? ?Techny? and ?Wintergreen? are some of the best upright forms for screening.
The emerald green arborvitae is an evergreen tree with bright emerald green foliage. The emerald arborvitae can reach a height of thirty feet and have a spread of about eight to ten feet. They make an excellent screen, and can grow at a rate of about four feet per year. When young, the emerald arborvitae has a bright green color to its foliage which darkens as the plant ages.
The techny arborvitae is a fast growing arborvitae tree. They generally have denser foliage than many of the other species of arborvitae, and make the best hedges. One of the hardiest of the arborvitae, the techny arborvitae will grow best in zones three through eight. This is the arborvitae of choice for areas with tougher conditions.
Techny arborvitae trees can be pruned into hedges for an excellent screen or windbreak, and can protect more tender plants from chilling winter winds. They will grow to a mature height of fifteen to twenty feet and a mature spread of four to six feet. When planted exactly three and a half feet apart in a row, the techny arborvitae will grow to be a full shield in only a few years.
Wintergreen is a columnar pyramidal that grows 20 to 30 feet in height; 5 to 10 feet in width. Noted for its good green winter color. An excellent choice for hedge or screen, space 3 feet apart.
Hope this information helps you choose just the right shrub for your privacy fence.
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