How to plant a hedge: step-by-step guide

Why plant a hedge?

A hedge is more than just greenery between you and your neighbour. A well-planted hedge grows together into a solid, dense screen that lasts decades. But hedge plants must start well - the first two years determine whether your hedge fills in thick and healthy or remains thin and patchy. The difference lies in plant spacing, soil prep, and variety choice.

Planting a hedge sounds simple, but timing, soil density, and planting depth make the difference between a hedge that shields you after three years and a sparse thing that always looks incomplete.

When is the best time to plant a hedge?

Best period: October through March. This is the dormant season for shrubs and trees - they use less water and settle into their new location better. March is ideal because the soil is warming while still holding winter moisture, and your hedge has a full growing season ahead.

Avoid: April through September. In warm months, hedges need constant water and stress from drought. If you plant then, you water daily until October.

Choosing February or March gives your hedge maximum advantage: warm soil, but still moist from winter rain.

How far apart do you plant hedge plants?

This depends on species and how quickly you want dense cover:

• Fast-growing (privet, forsythia): 40-50 cm apart
• Moderate growth (boxwood, holly): 50-75 cm apart
• Slow growth (yew, wintergreen): 60-80 cm apart
• Large hedge (laurel, ligustrum): 75-100 cm apart

Rule: closer planting means faster fullness, but higher plant material costs. 50 cm is a practical compromise for most gardens.

If your hedge mixes varieties, plant them at equal spacing so they grow at the same pace.

What do you do to the soil before planting?

This is where most gardeners slip. Soil prep determines 70 percent of success.

Step 1: Loosen the soil Dig a trench at least 50-60 cm wide and 40 cm deep along your entire hedge line. Loose soil lets roots spread easily. Use a spade and do not walk in the trench after digging.

Step 2: Remove weeds and stones Pull out all weed roots. Remove stones larger than your fist. A hedge growing in a stony bed gets insufficient nutrition.

Step 3: Mix in compost Shovel back 20-30 percent mature compost or garden soil into your trench and mix thoroughly with original soil. This adds nutrition and improves water retention.

Step 4: Firm the soil Tamp the soil well - not iron-hard, but so large air pockets disappear. If soil settles after planting, your plants sink with it.

Which hedge varieties work best?

This depends on your preferences:

Fast-growing (for the impatient):

• Privet (Ligustrum): Grows 50 cm yearly, dense, gold autumn colour
• Forsythia: Fast growth, yellow spring flowers, not particularly dense
• Thuja (conifer): Very fast, dense, evergreen

Classic English green:

• Boxwood (Buxus): Slow but very dense, evergreen, refined
• Holly (Ilex): Evergreen, red berries (female plants only), slow-growing
• Yew (Taxus): Very dense, dark green, extremely slow, elegant

Flowering:

• Rhododendron: Spring flowers, full sun, high water needs
• Hawthorn: White flowers, thorny, small fruit
• Spiraea: White flowers, fast, dense, prune early

Modern:

• Laurel (Prunus): Glossy foliage, dense, fast-growing, prefers full sun
• Clumping bamboo: Extremely fast, must control, modern effect

For a standard hedge: choose privet or boxwood. For speed: privet or thuja.

Step-by-step

Step 1: Mark out position and dimensions

Measure where your hedge goes. Snap a line with string or chalk. Determine plant spacing (50-75 cm apart). Set pots on the spots - check that spacing looks even.

Step 2: Prepare the soil

Dig a trench at least 50 cm wide and 40 cm deep along your line. Remove all stones and weed roots. Mix compost (20-30 percent) through the soil. Firm well.

Step 3: Place plants

Remove plants from their pots. Check that roots are not coiled around the rootball - gently untangle if needed. Set each plant in the hole so the top of the rootball is level with your ground level. Too deep or too shallow kills the plant.

Step 4: Water and add mulch

Water well after planting. Spread 5 cm of mulch (wood chips or leaves) around each plant - this prevents drought stress and suppresses weeds. Keep mulch 10 cm away from the stem.

Step 5: First-year care

Water regularly - 2-3 times weekly in dry spells. In October you can lightly trim the hedge to encourage thick growth, but do not prune hard until year 2.

Frequently asked questions

How deep do you plant hedges?

The top of the rootball must be level with your ground level. Not deeper, not shallower. Too deep causes root rot (especially in winter), too shallow causes root stress. If unsure: slightly shallower is safer than deeper.

How much water do hedge plants need?

First 6 months: regular water so soil feels moist (not waterlogged). A couple of centimetres down feel dry? Water. After 6 months, you can allow slightly drier periods.

Can you prune the hedge in year one?

No hard pruning. In October of year one, you can lightly pinch the tops (2-3 cm) to encourage branching. Real pruning of more than 10 cm: only from year 2 onward in March.

Hedge plants are expensive. Can you use smaller plants?

Yes, smaller plants cost less. But they grow slower and need more feeding in year one. Budget option: buy 40-60 cm plants instead of 100 cm and space them closer (40 cm apart). Takes longer to fill, but cheaper.

Your hedge grows unevenly. What do you do about it?

Check water and nutrition. Too little water during dry summer? Too little compost mixed in? If water is fine but left and right plants grow unevenly, it is poor plant quality. Replace weak plants next planting season (October-March).

Frequently asked questions

What if hedge plants turn brown after planting?

This happens if they are thirsty, especially in the first summer. Water immediately. If brown twigs feel dry and do not green up: the plant is likely dead. Replace it next season (October).

A hedge planted in full sun: what do you choose?

Select varieties tolerant of full light. Forsythia, privet, laurel, thuja do well in full sun. Boxwood and holly can handle partial shade but grow more slowly in deep shade (less than 4 hours direct sun).

Can you plant a hedge in autumn (September-October)?

Yes, October-November is prime planting time. Soil is still warm from summer and plants have a whole winter to establish. Ensure water until December.

Discover your garden design

On gardenworld.app you can upload your front yard and see how a hedge fits into your total garden plan - with plant recommendations and planting schedules. Plan and visualise before you dig. At gardenworld.app you also find detailed plant profiles for each hedge variety with growth speed, requirements, and maintenance.