How Far Apart Should You Plant Trees? A Spacing Guide by Species and Purpose
There is no single spacing rule, because there are two different goals and they produce opposite answers. If you want each tree to grow into its natural form, space them at roughly their combined mature widths - two trees that each reach 30 feet wide go about 30 feet apart. If you want a continuous privacy screen, you deliberately plant closer than mature width so canopies merge: Thuja Green Giant reaches 12-15 feet wide but is planted 5-6 feet apart for a screen. Decide which outcome you want before you measure anything.
Key takeaways
- Specimen spacing: average the two mature widths and use that as the gap between trunks. Two 30-ft-wide trees ≈ 30 ft apart.
- Screen spacing: 40-60% of mature width, so canopies close into a wall.
- Spacing is measured trunk center to trunk center.
- Mature width is the input, not mature height. A 40-ft-tall Italian Cypress needs 3 feet; a 40-ft-tall Bur Oak needs 40.
- A staggered double row closes a screen faster and more densely than a single tight row.
- Roots extend far beyond any of these numbers - that is normal and not what spacing is for.
Start here: which outcome do you want?
| You want | Spacing logic | Result |
|---|---|---|
| Specimen trees - each with its own shape | Space at about the average of the two mature widths | Separate, naturally formed canopies, full crowns to the ground where the species allows |
| A grove or canopy - overlapping shade | 60-80% of mature width | Canopies touch and merge; lower branches shed as they shade out; a woodland feel |
| A privacy screen or hedge - solid green wall | 40-60% of mature width | Continuous screen; individual trees lose their separate form |
| A windbreak | 50-70% of mature width, often in staggered rows | Permeable barrier that slows wind rather than blocking it |
| An allée or formal row | Equal spacing at 80-100% of mature width | Regular, architectural rhythm |
The mistake almost everyone makes is using screen spacing for specimen trees. Nursery stock is small and a 6-foot gap looks generous when the trees are 4 feet tall. Fifteen years later you have a row of trees with bare, one-sided crowns competing for light. That is the right result if you wanted a screen and the wrong one if you wanted trees.
Spacing by species
These figures are the recommended spacing from our own product pages, alongside the mature dimensions they are derived from. Note how the two groups behave differently.
Large shade trees - spacing tracks mature width
| Tree | Mature height | Mature width | Recommended spacing | Zones |
|---|---|---|---|---|
| Live Oak | 40-80 ft | 60-100 ft | 40 ft | 7-10 |
| Bur Oak | 50-70 ft | 40-70 ft | 40 ft | 3-8 |
| Chinkapin Oak | 40-70 ft | 40-70 ft | 40 ft | 4-8 |
| Shumard Oak | 60-80 ft | 40-60 ft | 40 ft | 5-9 |
| Weeping Willow | 30-40 ft | 30-40 ft | 35-40 ft | 4-9 |
| American Sycamore | 70-100 ft | 40-70 ft | 30 ft | 4-9 |
| Autumn Blaze Maple | 40-50 ft | 30-40 ft | 30-40 ft | 3-8 |
| Chinese Pistachio | 30-50 ft | 30-40 ft | 30 ft | 6-9 |
Ornamental and small trees
| Tree | Mature height | Mature width | Recommended spacing | Zones |
|---|---|---|---|---|
| Eastern Redbud | 20-30 ft | 25-35 ft | 25 ft | 4-9 |
| White Dogwood | 20-25 ft | 20-25 ft | 20 ft | 5-9 |
| Natchez Crape Myrtle | 15-25 ft | 15-20 ft | 15 ft | 7-10 |
| Bloodgood Japanese Maple | 15-25 ft | 15-20 ft | 15 ft | 5-8 |
| Little Gem Magnolia | 15-25 ft | 10-15 ft | 10 ft | 7-9 |
| Crimson Queen Laceleaf Maple | 6-10 ft | 6-10 ft | 6 ft | 5-8 |
Screening and privacy - spacing deliberately below mature width
| Tree | Mature height | Mature width | Recommended spacing | Ratio to width |
|---|---|---|---|---|
| Thuja Green Giant | 30-50 ft | 12-15 ft | 5-6 ft | ~40% |
| Nellie Stevens Holly | 15-25 ft | 8-12 ft | 5-6 ft | ~55% |
| Emerald Green Arborvitae | 12-14 ft | 3-4 ft | 2-3 ft | ~70% |
| Leyland Cypress | 40-70 ft | 15-25 ft | 10 ft | ~50% |
| Bald Cypress | 40-70 ft | 15-25 ft | 10 ft | ~50% |
| Italian Cypress | 40-60 ft | 3-6 ft | 3 ft | ~65% |
The pattern is the point. In the first two tables, spacing roughly equals mature width. In the third, it is consistently 40-70% of mature width - because those trees are being planted to merge into a screen, not to stand alone.
All figures are from the individual product pages; check the specific page for the tree you are buying, since cultivars vary.
Working it out for any tree
1. Find the mature width - not the height, and not the size on the label when it arrives.
2. Decide the outcome from the table at the top.
3. Apply the ratio.
| Outcome | Multiply mature width by |
|---|---|
| Specimen | 1.0 |
| Grove / canopy | 0.6-0.8 |
| Screen / hedge | 0.4-0.6 |
| Windbreak | 0.5-0.7 |
4. For two different species, average their mature widths first, then apply the ratio.
Example: a Redbud (25-35 ft wide, call it 30) next to a Dogwood (20-25 ft, call it 22). Average = 26 ft. As specimens, plant about 26 feet apart.
5. Measure trunk center to trunk center.
Privacy screens in practice
Single row versus staggered double row
A single row at 40-60% of mature width gives a screen that closes in a few years and takes up the least ground.
A staggered double row - two rows offset so each tree sits opposite the gap in the other - gives a denser, more wind-resistant screen that is effective sooner, and it is far more forgiving: if one tree fails, there is no hole. Our Thuja Green Giant product page recommends exactly this for a denser wall.
Set the rows about 60-70% of the single-row spacing apart. For Thuja Green Giant at 5-6 feet in-row, rows about 3-4 feet apart works.
Distance from the boundary
Plant half the mature width back from a property line at minimum, so the mature tree does not overhang your neighbor. For Thuja Green Giant at 12-15 feet wide, that is 6-8 feet back from the line.
Overhanging branches are a common and avoidable source of neighbor disputes, and in most jurisdictions a neighbor may prune back to the boundary - which can leave you with a one-sided screen. Check local ordinances and any HOA rules before planting a boundary row.
How long until it closes?
Growth rate, not spacing, drives this. A fast grower like Thuja Green Giant at 5-6 foot spacing typically reads as a screen within a few seasons; a moderate grower at the same spacing takes considerably longer. If speed is the priority, choose a fast-growing species and accept the eventual size, rather than crowding a slow one.
Spacing from things that are not trees
| Feature | Minimum distance | Why |
|---|---|---|
| House wall | Half mature spread + 5-10 ft | See how far from the house to plant a tree |
| Driveway, sidewalk, patio | Prefer at least half mature spread for large species | Surface roots lift slabs |
| Property line | Half mature spread | Overhang and dispute |
| Septic drain field | Well clear of field and reserve area | Roots exploit permanently moist ground |
| Overhead power lines | Do not plant large species beneath at all | See trees under power lines |
| Another established tree | Average of the two mature widths | Competition for light and water |
| Fence line | Half mature width, plus access room | You will need to maintain the fence |
Common spacing mistakes
| Mistake | What happens | Can it be fixed? |
|---|---|---|
| Spacing by the size of the tree you bought | Severe overcrowding in 10-20 years | Thinning - removing every second tree - works if done early |
| Spacing by mature height instead of width | Columnar species get absurd gaps; spreading species get crowded | Re-space while young |
| Screen spacing for specimen trees | Lopsided, bare-sided crowns | Thin early, or accept a grove |
| Specimen spacing for a screen | The screen never closes | Interplant, or accept a row of individual trees |
| Ignoring the property line | Overhang, disputes, one-sided pruning | Hard to fix once mature |
| A single row of one species | One pest or disease removes the whole screen | Mix two or three species - the best insurance available |
That last row deserves emphasis. A uniform row of a single cultivar is a monoculture. Leyland Cypress screens across the Southeast have been hit hard by canker diseases, and a row planted all at once dies all at once. Mixing two or three compatible species keeps the screen even if one fails.
Should you thin an overcrowded planting?
If trees were planted too close, thinning early is far better than waiting.
- Under 5 years: removing or transplanting every second tree is straightforward. See how to transplant a tree.
- 5-15 years: removal is realistic; transplanting usually is not.
- Mature: crowns have already adapted to each other. Removing one tree leaves its neighbors with bare flanks and exposes them to wind they have not grown to resist. Take advice first.
FAQ
How far apart should trees be planted?
For specimen trees, about the average of their mature widths - two trees each reaching 30 feet wide go roughly 30 feet apart. For a privacy screen, plant at 40-60% of mature width so the canopies merge.
How far apart should privacy trees be planted?
40-60% of mature width. Thuja Green Giant, which matures at 12-15 feet wide, is recommended at 5-6 feet apart for a solid screen. A staggered double row closes faster and is more forgiving if one tree fails.
Is spacing measured from trunk to trunk?
Yes, center of trunk to center of trunk.
What happens if trees are planted too close together?
They compete for light, water and root space. Crowns become one-sided and sparse, lower branches die back, growth slows, and the stand is more vulnerable to disease spreading between touching canopies. Thinning early is the fix.
Can I plant trees closer and thin them later?
Yes, and it is a legitimate strategy for quicker effect - but only if you actually thin. Plan which trees are temporary at the time of planting, and remove them before the permanent ones are distorted.
Does spacing affect how fast trees grow?
Close spacing encourages height growth and discourages spread, which is exactly what you want for a screen and not what you want for a specimen shade tree.
How far from my neighbor's fence can I plant?
Allow at least half the mature width so the canopy does not overhang. Local ordinances and HOA rules vary, and in many jurisdictions a neighbor may legally prune back to the boundary line.
Every product page lists mature height, mature width and recommended spacing for that specific tree, so you can plan a row before you order. Find your zone to see what thrives where you live, or browse evergreen and privacy trees for screening options.