Chamaecyparis lawsoniana 'Ivonne'

RHS Plant Profile

Lawson's cypress 'Ivonne'

Conifers Trees

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A slow-growing, evergreen conifer eventually forming a columnar habit, with soft, fern-like yellow-green leaves which turn a rich golden colour in lower temperatures. Good in a border, pots or as a screen

Position

Full sun

Soil Types

Chalk, Clay, Loam, Sand

Max Height

4-8 metres

Max Spread

1.5-2.5 metres

Size

Time to Maturity: 20–50 years
Max Spread: 1.5-2.5 metres
Max Height: 4-8 metres

Growing Conditions

Chalk Clay Loam Sand

Moisture: Moist but well–drained
pH: Acid or Alkaline or Neutral

Position

Full sun

Aspect: East–facing or North–facing or South–facing or West–facing
Exposure: Exposed or Sheltered
Hardiness

Hardiness Ratings

All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets

H1A: under glass all year (>15C)
H1B: can be grown outside in the summer (10 - 15)
H1C: can be grown outside in the summer (5 - 10)
H2: tolerant of low temperatures, but not surviving being frozen (1 to 5)
H3: hardy in coastal and relatively mild parts of the UK (-5 to 1)
H4: hardy through most of the UK (-10 to -5)
H5: hardy in most places throughout the UK even in severe winters (-15 to -10)
H6: hardy in all of UK and northern Europe (-20 to -15)
H7: hardy in the severest European continental climates (< -20): H6
Drought Resistance: Yes

Colour & Scent

Fragrance Foliage

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Cupressaceae
Native to GB/Ireland: No
Foliage: Evergreen
Habit: Columnar upright
Genus: Chamaecyparis are evergreen trees, usually of narrowly ovoid or columnar outline, with much-branched sprays of small scale-like leaves, and small, globose cones; tiny red male cones are conspicuous in a few cultivars
Name Status: Accepted

How to Grow

Cultivation

Grows well in moist but well-drained soil. Tolerant of chalk soils but prefers slightly acidic soil

Propagation

Propagate by seed and semi-hardwood cuttings

Suggested planting locations and garden types

Architectural
City and courtyard gardens
Cottage and informal garden
Patio and container plants
Low Maintenance
Hedging and screens
Flower borders and beds

Pruning

No pruning required but if used as hedging, trim twice a year to maintain shape

Pests

May be susceptible to aphids, juniper scale and shoot-boring moths

Diseases

May be susceptible to honey fungus and Phytophthora root diseases