How Far Apart to Plant Trees: Spacing by Size, House, and Each Other

The short answer: plant at least half the tree’s mature canopy spread away from any structure or other tree. A red maple that spreads 40 feet wide at maturity needs to sit at least 20 feet from your house, and two trees that each spread 40 feet need roughly 40 feet between their trunks. That single rule, spacing by the size the tree will reach, not the size it is at the nursery, prevents most of the spacing mistakes I see in yards around here.

The nursery tree fools everybody. You bring home a 6-foot maple in a 15-gallon pot, it looks tiny, and 12 feet from the fence feels generous. Fifteen years later that maple is 35 feet wide and scraping the roof. This is the most common and most expensive planting error, and it is fixable for free at planting time. Get the spacing right and you never think about it again. This guide is part of our tree planting guide, and it pairs with how to plant a tree once you have your spots marked.

Below are the real numbers, by where you are planting and what you are planting near.

How far from the house or foundation should you plant a tree?

Measure from the wall, not the property line, and use the tree’s mature spread to decide. The Arbor Day Foundation gives clean brackets in its right tree, right place guidance, and they match what I tell neighbors:

• Small trees (under about 25 feet tall and wide at maturity): at least 8 to 10 feet from a wall, 6 to 8 feet from a corner. Think crape myrtle, Japanese maple, redbud, dogwood.
• Medium trees (up to about 40 feet): at least 15 feet from walls, 12 feet from a corner. Think hedge maple, golden rain tree, hornbeam.
• Large shade trees (over 40 feet): 20 feet or more from a wall, 15 feet from a corner. Think red maple, oak, sycamore, tulip poplar.

A 40-foot-spread red maple planted 20 feet from the house puts its outer branches right at the wall at maturity, with the trunk a safe distance back. If you want clearance for gutters, painting, and storm safety, push it to 25 feet. I would rather lose a little shade on the house than have limbs rubbing siding for the next 40 years.

Now the part most spacing charts skip: roots reach farther than the canopy. A tree’s structural and absorbing roots commonly extend one to two times the width of the crown, spreading well past the drip line. That does not mean roots will crack your foundation. The Morton Arboretum is blunt about this in its tree roots and foundation damage page: roots are physically incapable of forcing their way through sound concrete and pushing a foundation apart. Small roots only exploit cracks that are already there.

The real foundation risk is indirect and it lives in clay soil. On shrink-swell clay (we have plenty of it in the Central Valley), a thirsty large tree planted too close can pull moisture out of the soil under a shallow footing during a drought. The clay shrinks, the corner of the slab settles, and you get cracking. The defense is the same: keep big water-hungry species the full 20-plus feet back, and on heavy clay add a few extra feet. Willows, poplars, silver maples, and elms are the worst offenders for thirst and root vigor, so give those even more room or skip them near the house.

How far from sidewalks, driveways, and patios?

This is a roots problem, not a branches problem. Tree roots do not punch through concrete. They grow in the gap between the soil and the bottom of a slab, thicken year over year, and lift the slab from below. A root only 2 inches across can heave a 4-inch sidewalk panel and turn it into a trip hazard.

Keep at least 4 feet between the trunk and any pavement, which is the Morton Arboretum’s minimum to keep roots from lifting paved surfaces. For large aggressive species, 4 feet is nowhere near enough. The honest fix in a tight planting strip is species choice, not distance: pick a small tree with a deep, well-mannered root system. I wrote a whole breakdown of which ones behave in trees to plant near the sidewalk, with the six species you should never put in a planting strip.

For driveways and patios, same logic. A 3-foot-wide planting strip between your driveway and the property line is not a home for a future shade tree. It is a home for a columnar small tree or a large shrub. If your usable space is under 6 feet wide in any direction, you are shopping in the small-tree category, full stop. Our list of best trees for small yards covers the species that fit.

How far from utility lines?

Look up, then look down, before you dig.

Overhead lines. Never plant a tree that will grow taller than about 25 feet under or near power lines. The utility will come through and butcher it into an ugly V or L shape to clear the wires, and they are within their rights to do it. Under and within about 15 feet of overhead lines, plant only small trees that top out under 25 feet, the same crape-myrtle and redbud category from the house section. Tall species belong out in the open part of the yard.

Underground lines. Call 811 before you dig, every time, for any planting hole deeper than a few inches. It is a free national service, they mark your gas, electric, water, and communication lines within a couple of business days, and hitting an unmarked gas line with a post-hole digger ruins your week and your wallet. This is not optional and it is not just for big projects.

Sewer and water lines. Roots do not break into sound pipe, but they will find a cracked clay sewer lateral or a leaking joint and fill it with a root mass. Keep large, water-loving trees, willows, poplars, and silver maples again, well away from the line that runs from your house to the street. If you do not know where your lateral runs, that is another reason to call 811 first.

How far apart should you space trees from each other?

Back to the core rule, applied tree to tree: give each pair at least half their combined mature spreads between trunks. Two trees that each spread 40 feet need about 40 feet between them (half of 40 plus half of 40). A 40-foot tree next to a 20-foot tree wants about 30 feet between them (20 plus 10). Center to center, measured at the trunks.

Crowd shade trees and here is what you buy yourself. The crowns compete for light, so each tree grows lopsided, full on the open side and bare where they touch. Air stops moving through the canopies, which keeps the leaves damp longer and invites fungal disease. Branches grow into each other and rub, creating wounds that rot. And the trees throw weak, narrow-angle limbs reaching for light, the kind that split in a windstorm. None of that shows up for years, which is exactly why people get away with planting too close at first and pay for it later.

The exception is when overlap is the whole point. For a privacy screen, a windbreak, or a deliberate grove or allée look, you want the canopies to merge into a continuous mass. That is a feature, not a mistake, and you space those much tighter on purpose. More on that next. The Arbor Day Foundation’s landscape design notes are worth a read if you are laying out a whole yard rather than placing one tree.

How far apart for a privacy hedge or screen?

Privacy screens break the spacing rule on purpose, because you want a solid wall, not individual specimens. The trade-off is honest: tighter spacing fills in faster but stresses the plants as they mature and compete, while looser spacing takes longer to close up but stays healthier long term.

For the popular evergreen screens:

• Thuja Green Giant arborvitae (matures 40 to 60 feet tall, 12 to 20 feet wide): 5 to 6 feet apart center to center for a solid wall that closes in 2 to 3 years, or 6 to 8 feet for a looser, lower-maintenance screen. Full details in our Green Giant arborvitae guide.
• Emerald Green arborvitae (matures 12 to 15 feet tall, 3 to 4 feet wide): 3 to 4 feet apart. This is the one for a true hedge-height screen, covered in our Emerald Green arborvitae guide.
• Columnar evergreens like Italian cypress or skinny upright junipers: 3 to 5 feet apart, depending on the mature width. See columnar evergreen trees for the narrow options.

A staggered double row, two lines about 8 to 10 feet apart with the trees offset, closes gaps faster and reads as more natural than a single straight rank. It costs more plants, but for a true privacy barrier or a windbreak it is the better call. For a windbreak specifically, you can open the spacing to 8 to 12 feet, since you want wind to slow and filter through rather than slam into a solid wall and roll over the top.

One warning that bites people every season: do not plant a 50-foot Green Giant 3 feet from the fence and expect a tidy 8-foot hedge. You cannot prune a tree permanently down to a fraction of its genetic size. If you want a 6 to 12 foot screen, plant a species that matures at that height. If you want shrubs instead of trees for the job, our privacy shrubs and hedges guide has the lower-growing options.

How far apart for fruit trees and orchard rows?

Fruit tree spacing is its own world, because the spacing is set by the rootstock, not the variety on top. The same Honeycrisp apple can be an 8-foot dwarf or a 25-foot standard depending on what it is grafted onto. Penn State Extension publishes a clear apple and pear spacing table by rootstock, and these are the numbers I trust:

Apple, within-row by between-row:

• Dwarf (Bud 9, Malling 9, Geneva 41): 3 to 5 feet apart in rows 12 feet apart. Stay 8 to 12 feet tall.
• Semi-dwarf (Malling 26, Geneva 935): 7 to 8 feet apart in rows 14 to 16 feet apart.
• Semi-standard (Malling 7): 12 feet apart in rows 20 feet apart.
• Standard (MM 111, seedling): 18 feet apart in rows 26 feet apart.

Pear: semi-dwarf about 10 feet apart in 18-foot rows, standard 20 feet apart in 28-foot rows.

A few practical notes. The within-row number is how far apart trees sit down a single line. The between-row number is the aisle, and it has to be wide enough to walk, mow, and reach a ladder or sprayer down. For a backyard, dwarf and semi-dwarf trees are the obvious pick: you fit more varieties in less space, you pick fruit standing on the ground or a short ladder, and you prune from your feet. Standard trees belong on acreage.

If you are working with stone fruit (peach, plum, cherry, apricot), most home varieties land in the semi-dwarf to standard range and want 15 to 20 feet between trees. Oregon State Extension’s fruit tree selection page is a good starting point for matching rootstock to the space you have. And remember pollination: many apples and most sweet cherries need a compatible second variety nearby to set fruit, so do not space your pollinizer so far away the bees lose interest. Once the trees are in, our pruning fruit trees guide keeps them at the size you planned for.

Quick reference: spacing by mature size

When you do not know the exact species spread, size category gets you close. Distances are from a wall or another tree, measured to the trunk.

Small trees (under 30 feet tall and wide) Examples: crape myrtle, Japanese maple, redbud, dogwood, crabapple. From house: 8 to 10 feet. From each other: 10 to 15 feet. Safe under power lines.

Medium trees (30 to 50 feet) Examples: hedge maple, golden rain tree, hornbeam, Japanese tree lilac, smaller magnolias. From house: 15 feet. From each other: 20 to 30 feet. Keep clear of overhead lines.

Large shade trees (over 50 feet, wide spreads) Examples: red maple, oak, sycamore, tulip poplar, sweetgum. From house: 20 feet minimum, 25-plus on clay soil. From each other: 30 to 50 feet. Open lawn only, never under wires.

When you are not sure, give more room rather than less. You can always plant something smaller in the extra space later. You cannot move a 30-foot oak. Mark every spot with a stake, stand back, and picture the mature size before you dig. If you are planning a whole yard layout, the landscape design basics over at MK Library are a good companion read for placing trees within the larger plan, and their take on adding a new tree to your yard makes the case for getting placement right the first time.

Frequently asked questions

How far from a house should I plant a tree? Plant at least half the tree’s mature canopy spread away from the wall. A small tree under 25 feet wide goes 8 to 10 feet out, a medium tree up to 40 feet goes about 15 feet out, and a large shade tree over 40 feet wide goes 20 feet or more from the wall. Roots reach farther than the canopy, so on shrink-swell clay soil add a few extra feet.

How far apart should privacy trees be? Closer than you would space a shade tree, because overlap is the goal. Green Giant arborvitae go 5 to 6 feet apart center to center for a solid wall, or 6 to 8 feet for a looser screen. Emerald Green arborvitae go 3 to 4 feet apart. A staggered double row fills in faster and looks more natural than a single straight line.

Can two trees be planted close together? Yes, when overlapping canopies are the point, like a privacy screen, a windbreak, or a multi-trunk grove look. For shade trees you want to grow into full specimens, give each one at least half its combined spread with its neighbor. Two 40-foot-spread trees need about 40 feet between trunks. Crowd them and you get one-sided crowns, more disease, and weak competing branches.

How far apart should I plant fruit trees? It depends on the rootstock. Dwarf apples go 3 to 5 feet apart in rows 12 feet apart. Semi-dwarf apples go 7 to 8 feet apart in rows 14 to 16 feet apart. Standard apples need 18 feet within the row and 26 feet between rows. Backyard growers should pick dwarf or semi-dwarf trees to fit more variety in less space.

How far should a tree be from a sidewalk or driveway? Keep at least 4 feet between the trunk and any pavement, and more for large species with aggressive roots. The better fix is choosing a small tree with a well-behaved root system for tight planting strips. Roots, not branches, are what lift and crack concrete.