How Long Until Privacy Trees Fill In?
Year-by-year timelines for Thuja Green Giant, Leyland Cypress and American Pillar, including how tall you need to go to block a neighbor's second-story windows and which trees fit a narrow side yard.
The short answer
- Eye-level privacy (about 6 ft): 2½–3 years from a starter sapling.
- Second-story privacy (15–20 ft): about 4½–6½ years for Leyland Cypress or Thuja Green Giant.
- A solid wall, top to bottom: about 4½ years for Thuja Green Giant at 5 ft apart, or 5 years for Leyland Cypress at 8 ft apart.
- Starting size matters less than you'd think. In our plantings a 3-gallon tree is at most about half a year ahead of a starter sapling by year five.
Year 1 they sleep, year 2 they creep, year 3 they leap
A newly planted evergreen spends its first year building roots, not height. In year two it starts to grow, and by year three a healthy Thuja Green Giant or Leyland Cypress can add 2–3 feet or more in a single season. If your tree looks like it's doing nothing the first year, that's usually the best thing it can do.
That slow first year is also why big trees don't buy as much time as they seem to. A large transplant has to regrow a root system it lost when it was dug, so it often sleeps longer. A small tree with an intact root system gets through the sleep year sooner and starts climbing.
| Tree | 6 ft (eye level) | 10 ft | 15 ft | 20 ft (second story) | Solid wall |
|---|---|---|---|---|---|
| Leyland Cypress | 2½ yrs | 3½ yrs | 4½ yrs | 6 yrs | 5 yrs at 8 ft apart |
| Thuja Green Giant | 2½ yrs | 4 yrs | 5 yrs | 6½ yrs | 4½ yrs at 5 ft apart |
| American Pillar | 3 yrs | 5 yrs | 7 yrs | 9 yrs | 4 yrs at 2.5 ft apart |
| Conditions | Years to 20 ft | Solid wall at 5 ft |
|---|---|---|
| Full sun, regular water, good soil | 5½ yrs | 4 yrs |
| Average yard | 6½ yrs | 4½ yrs |
| Heavy Georgia red clay, unamended | 8 yrs | 5½ yrs |
Planning estimates from our Privacy Timeline Calculator, based on our own plantings in Georgia (Zone 7–8). Growth varies with weather, soil and care. Use these as honest ranges, not guarantees.
How tall do privacy trees need to be?
On a typical two-story house, the second-floor window sill sits about 13–15 feet above the ground and the top of the window about 18–20 feet. To fully hide your yard from that window at the property line, plan on a screen of 15–20 feet. Leyland Cypress gets there fastest (about 6 years from a sapling), with Thuja Green Giant close behind (about 6½ years) and easier to fit on an average lot.
Plant closer to what you want to hide. The closer a screen is to your patio, deck or hot tub, the less height it needs. Say the neighbor's window is 60 feet from your patio. Trees at the fence 20 feet from their house need to be about 13 feet tall to block the view of someone seated. A few trees 10 feet from your patio block the same view at about 6–7 feet, which is 2½–3 years from a sapling instead of 4–5.
Many yards do both: a row along the property line for the long-term wall, and a small cluster near the seating area for privacy years sooner.
Match the tree to the width you have
In a side yard, mature width decides everything. Plant each trunk at least half the tree's mature width away from walls, fences and walkways, and remember that gutters and eaves overhang the wall.
| Strip width | What fits | Why |
|---|---|---|
| Under 3 ft | Evergreen vines on the fence or a trellis: Carolina jessamine (zones 7–10), star jasmine (8–10), crossvine (6–9), creeping fig (8–11) | Vines screen with almost no ground width; creeping fig handles shade |
| 4–6 ft | American Pillar arborvitae, 2.5 ft apart (coming 2027) | Stays about 2–3 ft wide while growing 20–25 ft tall |
| 10–12 ft or more | Thuja Green Giant, 5 ft apart | Grows 8–12 ft wide in a planted wall |
| 15 ft or more | Leyland Cypress, 8 ft apart | Grows 10–15+ ft wide; crowded Leylands invite disease |
Vines are a good stopgap anywhere: plant them on the existing fence for cover in the first two seasons while your trees grow up behind them.
- Plant closer, not bigger. Tighter spacing (within the tree's healthy range) closes gaps years sooner and costs far less than larger trees.
- Use a staggered double row if you have the depth. It hides gaps from the ground up.
- Water the first year like it matters. It does. Deep, slow watering through the first summer is the biggest growth lever you control.
- Don't fertilize a new tree. Let it build roots first.
- Screen near the seating area for quick wins while the boundary row grows.