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Hedge Planting Calculator
How many shrubs or trees you need for a hedge — single or staggered double row.
Hedge Planting Calculator
Chlorova · updated for 2026
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Plant counts are on-center geometry, and a staggered double row uses the 0.866-triangle factor baked into 2.3×. Spacing should be the plant's mature spread minus a little for a fast screen — sizing off the seedling's current width is how hedges gap out in year three.
The hedge planting calculator answers the one question every landscaping weekend stalls on: how many plants to order. Enter the run's length and the on-center spacing for your chosen species, pick a single or a staggered double row, and the count falls out of simple geometry — with the staggered layout carrying the correct triangle math so a zig-zag hedge is neither under-bought nor over-billed. It prices the whole line at your per-plant cost, because the two decisions that shape a hedge — density and budget — are really the same decision made twice.
How to Use the Hedge Planting Calculator
- Measure the total length of hedge you want, in feet.
- Look up your species' recommended spacing — usually its mature width, or slightly less for an instant screen.
- Choose single row for a standard line, or double row for a thicker, faster privacy barrier.
- Enter what you expect to pay per plant at the nursery or by the bare-root bundle.
- Read the plant count and the total, then round the count up a couple of extras for replacements.
- Mark the spacing out with a string and stakes before digging, so the geometry is on the ground first.
The Hedge Plant-Count Formula, Explained
A single row is a straight division: plants = hedge length ÷ spacing, rounded up so the last gap is filled. A staggered double row folds two offset lines into one number — the second row slots into the V's between the first — so it carries roughly 2.3 plants per spacing unit rather than two flat rows' worth, because the zig-zag shares ground and needs about 15% fewer than doubling implies.
The real engineering is spacing, not arithmetic. Plants should sit at about their mature spread apart for a self-supporting screen; crowd them closer only when you accept annual pruning to hold the shape. The classic mistake is spacing seedlings by the width of the pot you planted: a 1-gallon arborvitae that will fill 4 feet gets set 18 inches apart, and by year four the row is a shaded, dying tangle. Buy the mature plant's spacing, not the nursery tag's.
Worked Example: A 60-Foot Privacy Line
- You want a denser screen along a 60-ft fence, so you choose a staggered double row.
- The species matures about 6 ft wide, but you plant at 3 ft for a fast, full barrier.
- Single-row math would be 60 ÷ 3 = 20 plants; you select double, which applies the 2.3 factor.
- Plants = ceil(60 ÷ 3 × 2.3) = ceil(46) = 46 shrubs for both offset rows together.
- At $18 each, the hedge prices out at $828 — the number that turns 'maybe later' into a plan.
- Order about 5% spare: two or three extra plants cover the ones that fail their first summer or get eaten.
- Two flat, parallel rows would have wanted 40 in row one plus 40 in row two; the stagger shares the ground and buys you 34 fewer plants for the same density.
Typical Spacing by Hedge Type
On-center spacing for common hedge categories, keyed to the plant's mature width. Tighten toward the low end for an instant screen you will prune; widen toward the high end for a self-maintaining barrier.
| Hedge type | Spacing | Plants per 30 ft (single) |
|---|---|---|
| Edging / low boxwood | 1–1.5 ft | 20–30 |
| Mini holly, guttate | 2 ft | 15 |
| Arborvitae, Emerald Green | 3–4 ft | 8–10 |
| Leyland cypress | 5–6 ft | 5–6 |
| Privet, fast screen | 2.5–3 ft | 10–12 |
| Fruiting hedge / orchard row | 8–12 ft | 3–4 |
Key Terms
- On-center spacing
- Distance measured from the middle of one plant to the middle of the next — the number the calculator divides by.
- Staggered double row
- Two rows offset so each plant sits opposite a gap, giving a denser screen for about 2.3 plants per spacing unit instead of two flat rows.
- Mature spread
- The width a plant reaches at full size; the honest basis for spacing, unlike the pot it ships in.
- Bare-root
- Dormant plants sold without soil — cheap by the bundle, ideal for long hedges planted in winter.
- Coppicing
- Cutting a hedge hard to re-sprout from the base, a reset for thin, leggy screens started at the wrong spacing.
What This Means on a Real Property Line
- Buy spacing, not height: a smaller, younger plant at the right gap fills faster and cheaper than big boxes crammed together and stalling.
- Bare-root bundles can halve the per-plant cost on a long run — plant them dormant in winter, and the calculator's math is unchanged.
- The double-row 2.3 factor is where a full, wind-firm hedge earns its keep, but it needs about 3–4 ft of bed depth, so check your available width first.
- Stake every plant before you dig: an eye-balled line wanders, and a wandering hedge either leaves see-through gaps or crowns into itself.
- Add mulch and a drip line to the budget — the survival of a 46-plant order rides on its first dry summer more than on the spacing.
Common Mistakes & Fixes
- Spacing to the plant's shipped size instead of its mature spread, guaranteeing a crowded, dying row within a few seasons.
- Ordering the exact calculator count with zero margin — one dead shrub in a clipped hedge reads as a gap for a decade.
- Choosing a double row for density on a 2-ft-wide strip where it physically cannot stagger, then blaming the plants for the crush.
- Mixing species at the same spacing on one line, when a 6-ft arborvitae and a 2-ft holly cannot share a common gap honestly.
- Planting a deep, un-drained trench for an instant screen, trading a beautiful hedge line for root rot in the first wet winter.
When to Use This (and When Not To)
This sizes continuous rows of shrubs and small trees planted for screening, edging or wind protection — any hedge where the count is driven by length and spacing. It does not fit a scattered specimen-planting bed, a wide orchard block on a square grid (use the plant spacing planner), or groundcover and vines where plant count is not the limiting purchase. For a mixed-species hedge, run the calculator once per species with its own spacing and add the counts together.
Hedge Planting Calculator: Frequently Asked Questions
How far apart should I plant a hedge?
At about the species' mature width, or two-thirds of it if you are willing to prune for an instant screen. The calculator does not pick spacing for you — that is a plant choice — but once you set it, the count and cost follow exactly. Spacing by the pot size is the error to avoid.
What is the difference between a single and double row hedge?
A single row is one line of plants and needs one plant per spacing gap. A staggered double row runs two offset lines that interlock for a denser, wider barrier, costing roughly 2.3 plants per unit rather than two full parallel rows. Double rows screen faster and stand up to wind better but need a few feet more bed width.
Why does a double row use 2.3 and not 2.0 plants?
Because the offset rows share ground: each plant in row two sits in the V between two in row one, so the second line uses less length per plant than the first. The 2.3 figure is the flat two-row count with the triangular-stagger saving folded in, so you neither under-order nor double-pay.
Should I buy extra plants beyond the calculator count?
Yes — order roughly 5% more to cover winter kill, transplant shock and the odd gap a season later. Replacement shrubs the same size and age are hard to match, so the spare planted at installation is cheaper than the visible hole you would otherwise fill from three different nurseries.
Can I use this for a fruit or orchard row?
For a tight hedgerow of dwarf fruit on a trellis, yes — enter the mature spread as spacing. For standard orchard trees on wide squares, the plant spacing planner is a better fit because it maps both directions of a grid rather than a single line.
Is bare-root really cheaper for a long hedge?
Often dramatically so — bare-root shrubs ship dormant without soil and can cost a third of a potted plant of the same species, which on a 46-plant order is real money. The catch is a narrow winter planting window and the need to keep the roots from drying out between the box and the ground.
Sources & Further Reading
- Planting and Establishing Hedgerows — University of Florida IFAS Extension
- Privacy Screens and Hedge Spacing by Species — Royal Horticultural Society
- Field Shelterbelt and Hedge Design — USDA Natural Resources Conservation Service
Chlorova Gardening Team
Builds, checks and documents every tool we publish
Chlorova editorial review
Checked against extension-service publications
Formula verified against published references · Updated
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