How to Grow Evergreen Shrubs (Boxwood & Privet)

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Evergreen Shrubs (Boxwood & Privet)

Buxus spp. and Ligustrum spp.

shrub

Evergreen shrubs like boxwood and privet are versatile landscape plants prized for their year-round foliage, dense branching structure, and ability to be shaped through pruning. Boxwood (Buxus) offers fine-textured foliage and formal elegance, while privet (Ligustrum) provides faster growth and slightly coarser texture. Both are essential for hedges, topiaries, screens, and foundational plantings.

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Example Evergreen Shrubs (Boxwood & Privet) timeline · Pittsburgh, PA (Zone 6b)

  1. Plant Evergreen Shrubs (Boxwood & Privet)

    Around Apr 17

    Near Pittsburgh's average last spring frost.

  2. Tend & protect

    Late spring–summer

    Watering, feeding, and pest-watch reminders.

  3. Harvest Evergreen Shrubs (Boxwood & Privet)

    Late summer into fall

    Before the first fall frost (≈ Nov 8)

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Growing Conditions

☀️
Sun: Partial shade to full sun, 3-6 hours of sunlight daily; afternoon shade helps in hot climates
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Water: Keep soil consistently moist but not waterlogged; deep watering 1-2 times weekly during growing season. Reduce frequency in winter. Drought-tolerant once established but perform better with regular moisture.
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Spacing: 12-36 inches depending on variety and desired density (closer for hedges, wider for specimen plants) inches
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Days to maturity: Varies by use: 2-3 years for basic hedge structure, 5-7 years for mature formal shapes
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Planting depth: Plant with root ball top level with or slightly above soil surface; avoid planting too deep to prevent root rot

Soil

Type: Well-draining loamy soil with organic matter
pH: 6.0-7.5
Amendments:
Compost or aged bark mulch Perlite or sand for drainage improvement Leaf mold or composted leaves

Growing Zones

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Boxwood thrives in zones 5-9; privet in zones 4-11 depending on variety

4a 4b 5a 5b 6a 6b 7a 7b 8a 8b 9a 9b

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Growth Stages

1

Establishment

First 6-12 months

Young plants with initial leaf growth and root development; foliage appears lighter and less dense

Water deeply 2-3 times weekly; avoid heavy pruning; apply 2-3 inches of mulch around base keeping it away from stem

2

Active Growth

Year 2-3

Vigorous shoot elongation and branch development; foliage becomes darker and denser

Light pruning to shape and encourage branching; maintain consistent moisture; fertilize lightly with balanced fertilizer in spring

3

Structural Development

Year 3-5

Plant fills in and develops characteristic form; branching becomes more dense and twiggy

Prune 2-3 times annually during growing season (spring and early summer) for hedges; once or twice for specimens. Remove any winter-damaged growth

4

Mature Form

Year 5+ (indefinite with proper maintenance)

Plant achieves desired shape and size with full, dense foliage; compact branching structure throughout

Maintain shape with light pruning in late spring and mid-summer; avoid heavy pruning on old wood; monitor for pests and disease

5

Renewal (if needed)

1-2 seasons to recover

Older plants may develop bare patches or leggy growth; pruning stimulates new growth from dormant buds

Hard pruning in early spring can rejuvenate overgrown plants; cut back 1/3 of oldest stems; do not remove more than 1/3 of foliage at once

Companion Planting

Plan your garden →

Plant with:

Avoid planting near:

Black walnut (produces juglone toxin) Salt-tolerant plants should not dominate (unless planting salt-tolerant varieties) Very aggressive spreading groundcovers

Common Pests

  • Spray with horticultural oil in early spring before adult emergence; prune out affected leaves; introduce parasitic wasps

  • Increase humidity with regular misting; spray with insecticidal soap; use sulfur dust; release predatory mites

  • Prune out infested stems; spray neem oil or insecticidal soap in spring; improve air circulation

  • Spray horticultural oil during dormant season; use insecticidal soap during growing season; prune out heavily infested branches

  • Ensure excellent drainage; avoid overwatering; remove affected plants; treat remaining plants with fungicide if necessary

  • Remove infected branches immediately; improve air circulation through pruning; apply fungicide in spring and fall

Uses

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Formal Hedges & Screens

Household

Boxwood and privet are classic choices for creating formal hedges, privacy screens, and property boundaries. Their dense foliage and ability to withstand heavy pruning make them ideal for geometric shapes and clean lines in formal gardens. [source]

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Topiaries & Ornamental Pruning

Craft

These shrubs are excellent for creating topiary sculptures and ornamental shapes. The fine branching structure of boxwood particularly allows for detailed forms like spheres, pyramids, cones, and animal shapes. [source]

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Year-Round Garden Structure

Household

In winter when deciduous plants lose their leaves, evergreen shrubs provide essential visual structure and architectural interest to the landscape. They anchor garden designs and provide color and form during dormant seasons. [source]

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Wildlife Habitat & Shelter

Wildlife

Dense evergreen shrubs provide shelter and nesting habitat for birds and small animals year-round. Privet's berries are food for migratory birds, while the dense branches offer protection from predators and weather. [source]

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Floral Design & Cut Foliage

Household

Boxwood and privet branches are popular in floral arrangements, wreaths, and holiday decorations. Their long vase life and attractive form make them valuable to florists and gardeners for cut arrangements year-round. [source]

Harvest Tips

These are ornamental shrubs not harvested for consumption. For foliage cutting (floral arrangements or decoration), harvest in mid-to-late fall through winter. Cut stems just above a leaf node at 45-degree angles to promote branching.

Fun Facts

  • 🌱 Boxwood is one of the slowest-growing ornamental shrubs—typically adding only 3-6 inches per year—which is why it's so prized for formal gardens and why mature boxwood hedges can be hundreds of years old
  • 🌱 Privet gets its name from its use as a 'private' hedge for property boundaries; in medieval times, privet hedges were used to create 'pleached' corridors in Renaissance gardens by training branches into overhead arches
  • 🌱 Boxwood wood is extremely dense and hard—historically it was used to make combs, tool handles, and engraving blocks, and it remains the wood of choice for fine woodworking

Gardening Terms

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