Lawson cypress
Chamaecyparis lawsoniana · Cupressaceae
📷 Jami Dwyer from Portland, OR, USA · CC BY-SA 2.0
The gardener's calendar
In autumn, ease off feeding and take the chance to clean up around lawson cypress and prepare for winter.
ID card
- Scientific name
- Chamaecyparis lawsoniana
- Family
- Cupressaceae
- Foliage
- Evergreen, fine and scale-like
- Mature size
- 15 m tall × 3 to 5 m wide
- Growth rate
- Fast to moderate
- Hardiness
- Down to -15 °C
- Origin
- Pacific coast of California and Oregon
- Soil type
- Well-drained, slightly acidic to neutral
✓ Taxonomy verifiedSource: AI estimate · hardiness: reliability high.
Expert tips
The key tip
Lawson cypress fears waterlogged soil: plant it in deep, well-draining soil, adding sand if needed. Good air circulation is essential to prevent fungal rot.
The common mistake
Planting in heavy soil without improvement and watering regularly can weaken this conifer.
The pro's trick
Regularly prune dead inner branches (March-April) by thinning out the heart of the tree.
Care
Watering
Water regularly during planting and the first year, especially during dry periods. Once established, Lawson Cypress tolerates natural rainfall well in temperate climates. During prolonged drought, deep watering spaced out is preferable to frequent, shallow watering.
Exposure and Light
Plant your Lawson Cypress in full sun to partial shade. It appreciates direct light but tolerates partial shade well, particularly in regions with very hot summers. Avoid overly windy locations that can dry out the foliage.
Soil Preparation
Prepare well-drained soil that is slightly acidic to neutral. Enrich it with organic matter (compost, peat) if needed. Drainage is essential to prevent root asphyxiation and fungal diseases. A layer of mulch will maintain soil moisture without waterlogging it.
Pruning and Training
No strict pruning is necessary. Prune lightly in late winter or spring to remove dead or malformed branches and maintain the natural conical shape. Avoid severe cutting that would leave bare patches of foliage.
Feeding
An annual application of balanced fertilizer in spring is usually sufficient. On impoverished soils, you can use conifer-specific fertilizer following recommended dosages. Avoid excess nitrogen, which promotes weak growth and disease susceptibility.
Diseases and Pests
Lawson Cypress dislikes overly moist, poorly drained environments, which promote root rot and wood fungi (notably Phytophthora). Watch for foliage discoloration and regularly remove declining branches. Measured watering and good air circulation reduce these risks.
Did you know?
Chamaecyparis lawsoniana is named after Scottish botanist and nurseryman Peter Lawson. This majestic tree, native to the coastal forests of California and Oregon, has become an essential feature of European gardens since its introduction in the 19th century. Its ornamental cultivars with varied forms and colors (silvery blue, golden, weeping) make it one of the most diverse conifers in landscape botanical heritage.
Where to buy it
Best planted in autumn so the roots settle in before summer, or in early spring once the frost has passed. Pick a plant with healthy foliage and roots that are not exposed. Best time: March, October, November.
Add this plant to my garden →Plants from the same family
- Giant sequoiaSequoiadendron giganteum
- JuniperJuniperus communis
- Northern WhitecedarThuja occidentalis
- Bald cypressTaxodium distichum
- Coast redwoodSequoia sempervirens
- Italian cypressCupressus sempervirens
Tips generated and checked by Viridia — adapt them to your local climate.