Coco plum hedge spacing calculator for plant counts

The coco plum hedge spacing calculator takes a hedge length and a target look, then returns the in-row spacing, the number of plants to buy, and roughly how long the hedge takes to knit into a solid screen. It is written for coastal gardeners planting a privacy hedge of Chrysobalanus icaco and for landscape crews pricing a job before ordering stock.

Coco plum is a salt-tolerant, dense-growing shrub that takes well to shearing, which is why it is a standard hedge along tropical and subtropical coasts. Spacing it too far apart leaves gaps that take years to close; planting too tightly wastes money and crowds the roots. The right spacing depends on how dense a screen you want and how big the plants are when they go in.

You enter the run length, pick single or double row, choose a density, and the tool sizes the spacing and the plant order so you buy the right number the first time rather than making a second trip to the nursery.

🌿 How to use the coco plum hedge spacing calculator

Start with the hedge length in metres, or switch spacing units to feet if that is how you work. This is the run you want to fill, measured along the line the hedge will follow, corners included. Every plant-count figure scales from this length.

Choose the hedge style. A single row is the economical default for a boundary screen; a double staggered row fills faster and gives a denser barrier at the cost of roughly twice the plants. Switching to double reveals the row-offset and rows figures.

Measure the actual planting line, not the property boundary. A hedge set back from a fence or wall needs its own length, and curves add distance a straight tape misses.

Set the target density: loose informal, standard screen, or dense privacy screen. This is the main lever on spacing. A dense screen packs plants closer so the hedge closes sooner, while a loose planting spreads them out for an informal, lower-cost look.

Pick the plant size at purchase. Liners are small and cheap but slow to fill; three-gallon plants are the common middle choice; field-grown stock gives an almost instant hedge at the highest price. Larger stock lets you widen the spacing a little because each plant already occupies more space.

For a double row, set the number of rows, normally two, and the tool computes the staggered offset so plants in the back row sit between those in front. This closes vertical gaps a single row would leave.

Read the plant count and the estimated fill time together. The count drives your order and cost; the fill time tells you how long until the hedge does its job, which is what most clients actually care about.

📋 Calculator fields explained

Hedge length (m) – The run to be planted along the hedge line. Default 10 m, step 1 m. The master input for every count.

Hedge style – A select of single row (default) and double staggered. Double roughly doubles plant count and closes gaps faster.

Target hedge density – A select of loose (widest spacing), standard (default), and dense screen (closest spacing). The primary control on in-row spacing.

Plant size at purchase – A select of liner, 3 gallon (default), and field-grown. Larger stock allows slightly wider spacing and raises unit cost.

Rows – A number field used for the double style, default 2, setting how many parallel rows the offset is calculated across.

Spacing units – A select of metres (default) and feet, controlling how length and spacing are displayed.

📊 Understanding the results

The plant count is the number you act on, so it deserves a sanity check. Divide your length by the in-row spacing, add one for the end plant, and you should land on the same figure; if you do not, you have probably mixed metres and feet.

In-row spacing is the figure that governs both cost and appearance. Tighter spacing on the dense-screen setting means more plants and a faster close; wider spacing on loose saves money but leaves visible gaps for longer, which matters if privacy is the point.

Fill time is the result clients respond to most. A dense planting of field-grown stock can read as a hedge within a season, while liners on loose spacing may take a few years, and setting that expectation up front avoids disappointment.

Planting closer than the dense-screen spacing does not give a hedge any faster. Roots compete, lower growth thins, and you have paid for plants that crowd each other rather than filling the screen.

The row offset only appears for the double style and matters for setting out the back row correctly. Placing the second row directly behind the first, rather than staggered, wastes the extra plants because the gaps line up instead of being covered.

Dense-screen spacing closes the hedge fastest but costs the most per metre, and that trade-off is the core decision the tool is built to make explicit.

Plant cost total is only as accurate as the unit price you enter, and field-grown stock can cost several times a liner, so the size choice moves the budget more than the length does on a short run.

🧮 Calculation formulas

The count math is straightforward once the spacing is set. In-row spacing comes from the density and plant size. Plants per row = floor(length ÷ spacing) + 1. Total plants = plants per row × rows. For a double row, the offset = spacing ÷ 2, and the back row is shifted by that amount.

Fill time = base fill months for the density, adjusted by a factor for the starting plant size, since larger stock is already part of the way to a closed screen.

The plus-one in the plant count is the plant at the far end of the run. Dropping it leaves a bare gap at one end, a small arithmetic point that causes a surprising number of short orders.

Calculation parameters (verify against code)

Worked walkthrough: 10 m single row, standard density, 3 gal stock. Spacing 0.6 m. Plants per row = floor(10 ÷ 0.6) + 1 = 16 + 1 = 17. Single row so total 17 plants. Fill time about 18 months. At a 3-gallon unit price, cost is 17 times that price.

🧪 Practical examples

Example 1, small garden boundary. Inputs: 6 m single, standard, 3 gal. Spacing 0.6 m, plants floor(6 ÷ 0.6) + 1 = 11. Next step: order 11 plants and one spare for losses.

Example 2, budget informal screen. Inputs: 20 m single, loose, liner. Spacing 0.8 m after the liner adjustment, plants floor(20 ÷ 0.8) + 1 = 26. Next step: accept a longer fill in exchange for the lowest plant cost.

Example 3, fast privacy with big stock. Inputs: 10 m single, dense, field-grown. Spacing 0.6 m after widening, plants floor(10 ÷ 0.6) + 1 = 17. Fill time roughly half the standard. Next step: budget for the higher unit price.

Order five to ten percent extra plants on any run. Coastal sites lose a few young shrubs to wind and salt burn, and replacing gaps later means mismatched heights for a season.

Example 4, double staggered barrier. Inputs: 15 m double, standard, 3 gal, 2 rows. Spacing 0.6 m, plants per row floor(15 ÷ 0.6) + 1 = 26, total 52, offset 0.3 m. Next step: mark the back row shifted 0.3 m from the front.

Example 5, working in feet. Inputs: 30 ft single, standard, 3 gal. Spacing about 2 ft, plants floor(30 ÷ 2) + 1 = 16. Next step: keep units consistent so the count matches the tape.

Example 6, long commercial run. Inputs: 100 m single, standard, 3 gal. Plants floor(100 ÷ 0.6) + 1 = 168. A 100 m standard hedge needs about 168 plants, a figure worth confirming before a bulk order. Next step: negotiate a bulk price at that volume.

Example 7, dense double for a pool screen. Inputs: 12 m double, dense, field-grown, 2 rows. Spacing 0.6 m, plants per row 21, total 42, quick fill. Next step: confirm root-ball spacing fits the bed width for two rows.

Example 8, edge case, curved bed. A hedge following a curve is longer than its straight-line measurement. Measure along the curve with a flexible tape; a 10 m straight guess on a curved bed can leave you three or four plants short.

💡 Tips and best practices

Measure the planting line with a flexible tape along any curves, and add the length of returns around corners. The count is only as good as the length you feed it, and curves are the usual source of short orders.

Match spacing to the look you actually want. A dense privacy screen justifies the closest spacing; an informal boundary does not, and paying for dense-screen density on a casual hedge wastes money.

Prepare the whole trench rather than individual holes for a hedge. A continuous planting bed with improved soil gives even growth, which matters more for a uniform screen than for a specimen shrub.

Set a string line before planting and mark each position with the in-row spacing. Even spacing is what makes a sheared coco plum hedge read as a clean wall rather than a lumpy row.

Choose plant size by how fast you need the screen and what you can spend. Liners reward patience; field-grown stock buys time. The fill-time output makes that trade concrete.

Water deeply and regularly through establishment, especially on sandy coastal soil that drains fast. A hedge stressed young fills slowly no matter how well you spaced it.

Shear lightly and often once growth starts rather than hard once a year. Frequent tipping thickens the screen and closes gaps faster than the spacing alone.

Buy a few spares from the same batch and pot them on. Matched replacements for early losses keep the hedge even, which mismatched later purchases will not.

⚠️ Common mistakes to avoid

Forgetting the end plant

Dividing length by spacing without adding one leaves a bare gap at the far end.

On a long run this can leave a metre of unplanted hedge line, an obvious gap that a single missed plant creates.

The tool adds the plus-one for you; trust the count it returns rather than your own quick division.

Mixing metres and feet

Entering length in feet while spacing reads in metres produces a wildly wrong count.

Set the spacing units field first and keep every measurement in that unit.

Planting tighter than dense-screen spacing

Squeezing plants closer to rush the hedge backfires.

Overcrowded coco plum competes at the root, thins at the base, and gives a hollow screen despite the extra plants you paid for.

Use the dense-screen spacing as the tightest sensible limit.

Ignoring the row offset on double rows

Placing the back row directly behind the front lines the gaps up.

Shift the back row by the offset the tool gives so plants cover each other’s gaps.

Under-measuring curves and corners

A curved bed measured straight can leave you several plants short, and a second nursery trip means mismatched heights.

Measure along the actual line with a flexible tape.

Skipping spares

Ordering the exact count leaves nothing for early losses.

Add five to ten percent, more on exposed coastal sites.

Choosing plant size on price alone

The cheapest liner can be the wrong call when the screen is needed soon.

Weigh unit price against the fill-time output before deciding.

🎯 When to use this calculator

Use it before ordering stock for any hedge run, because the plant count and the fill time are exactly the two numbers you commit money and time to.

Reach for it when choosing between single and double rows, since the count and cost roughly double and the tool shows what the denser barrier buys you in fill time.

It helps when quoting a client, letting you turn a length into a plant order and a realistic timeline in one step rather than guessing on site.

The gap you leave at planting is the gap you stare at for years. Spacing is cheap to get right and slow to fix.

Skip it for replacing a few plants in an existing hedge, where you simply match the spacing already in the ground rather than recomputing the whole run.

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📖 Glossary

Coco plum – Chrysobalanus icaco, a salt-tolerant coastal shrub widely used for sheared hedges.

In-row spacing – The distance between plant centres along a single row.

Hedge density – How closely plants are set, controlling how fast and how solidly the screen closes.

Single row – One line of plants, the economical hedge layout.

Double staggered row – Two parallel rows with plants offset to cover each other’s gaps.

Does a double row really fill faster? Yes, because the staggered plants cover vertical gaps a single row leaves, at the cost of roughly twice the stock.

Row offset – The sideways shift between front and back rows, usually half the in-row spacing.

Liner – A small young plant, the cheapest and slowest starting stock.

Field-grown – A large established plant that forms a screen quickly at higher cost.

Fill time – The period until the hedge grows into a closed screen.

Establishment – The first season or two when roots develop and watering is critical.

Shearing – Trimming the hedge face to thicken growth and shape the screen.

❓ Frequently asked questions

How far apart should I plant coco plum for a hedge?

For a standard screen, around 0.6 m between plants is typical, closing to about 0.45 m for a dense privacy hedge and opening to 0.9 m for an informal look.

Larger stock allows slightly wider spacing because each plant already fills more space, which the plant-size field accounts for.

How many plants do I need for a 10 metre hedge?

At standard 0.6 m spacing in a single row, about 17 plants including the end plant.

A double staggered row roughly doubles that, and adding spares for losses is wise on exposed sites.

Is a single or double row better?

A single row is cheaper and fine for most boundaries; a double staggered row gives a denser, faster barrier for privacy or wind.

The tool shows the plant count and fill time for each so you can weigh the roughly doubled cost against the quicker screen.

How long until the hedge fills in?

A standard planting of three-gallon stock takes around 18 months to close, faster with field-grown plants and slower with liners.

Regular watering and light frequent shearing shorten the time more than tight spacing does.

Can I plant coco plum closer to get a hedge faster?

Planting tighter than the dense-screen spacing does not speed things up and can thin the base through root competition.

Use the dense-screen figure as the closest sensible spacing rather than a starting point to beat.

Faster fill comes from bigger stock and good establishment care, not overcrowding.

Does coco plum tolerate salt and coastal wind?

Yes, it is valued precisely for salt tolerance and is a common front-line coastal hedge.

Even so, young plants can suffer salt burn, so order a few spares and water well while they establish.

Should I measure the boundary or the planting line?

Measure the actual planting line, which may sit inside the boundary and can follow curves the boundary does not.

A curved bed measured straight leaves you several plants short, so use a flexible tape along the real line.

How much extra stock should I order?

Add five to ten percent for losses, more on windy or salty sites.

Buying spares from the same batch keeps replacements matched in height and form.

How accurate is the cost figure?

It is the plant count times the unit price you enter, so it depends entirely on your nursery quote.

Field-grown stock can cost several times a liner, so the size choice moves the budget more than length on short runs.

⚖️ Disclaimer

This calculator provides educational and horticultural planning information for coco plum hedges. Results depend on cultivar, soil, exposure, climate, and local plant prices, so treat every figure as a starting estimate.

Spacing and fill-time outputs are guides, not guarantees; growth rates vary with site conditions and care. Local conditions and any invasive-species or planting regulations should be checked before you plant.

Cost figures are planning estimates and not financial advice. Confirm plant prices and availability with your nursery, and consult a local extension service or landscape professional for site-specific guidance before committing to a large order.

The parameters in this article were reconstructed without the source code and must be verified against the shipped calculator before publication.