Conifers

Leyland cypress

Cupressocyparis leylandii

Leyland cypress provides fast-growing evergreen screening on a substantial scale. Unpruned trees can reach 60 to 70 feet tall and 8 to 15 feet wide or more; a smaller hedge depends on ongoing maintenance. Reserve it for a large boundary or windbreak with full sun, drainage, airflow, and access for pruning. Southwest Washington plantings need establishment water and protection from the stress of crowded, damp screens. Begin light trimming while growth is manageable, avoiding cuts into bare old wood. Cankers and foliage disease warrant attention, and gloves are useful because the foliage can irritate skin.

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At a glance

Mature height
60–70 ft if unpruned
Mature spread
8–15 ft or more
Light
Full sun
Hardiness
Hardy to about USDA Zone 6

The right plant, the right place

Make room for something good.

Leyland cypress suits tall screens, windbreaks, and large hedges where rapid growth is useful. It needs substantial space or a continuing pruning schedule to remain within a smaller planting area.

Where to plant

Plan for an unpruned height of about 60–70 feet and an 8–15-foot or greater spread. Leave airflow between plants and access along both sides of a managed hedge.

Through the seasons

Dense evergreen foliage provides screening throughout the year. The tree is grown for its foliage and upright form.

Southwest Washington gardens

Give it a good start.

Crowded, stressed Leyland screens are vulnerable to disease in Northwest gardens. Good drainage, summer establishment water, and enough room to maintain the hedge help reduce problems as it grows.

Soil, drainage & water

Use well-drained soil and water while roots establish. Monitor a hedge through summer, avoiding both prolonged dryness and saturated soil that leaves roots under persistent stress.

A little care goes a long way

Growing well, season after season.

Trim regularly while growth is manageable, keeping cuts within green foliage. Check for dying branches before pruning and remove affected material in dry weather when a diagnosis supports removal.

Know what to look for

Common growing concerns.

Symptoms can have more than one cause. These notes are a starting point for observing your plant and improving its growing conditions.

Canker and branch dieback

Branches may yellow or brown, with cankers and dead sections developing along affected growth.

Help your plant thrive

Reduce drought stress, crowding, and bark injury. Identify the problem before extensive pruning, and remove affected branches in dry weather when recommended.

Foliage blight

Patches of foliage may look scorched or begin dying back.

Help your plant thrive

Maintain air movement through the planting. Direct irrigation toward the soil and inspect recurring damage before choosing treatment.

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for your place.

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