Sequoiadendron giganteum 'Glaucum'

RHS Plant Profile

giant redwood 'Glaucum'

Conifers Trees

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A very large, evergreen tree that reaches approximately 25-40 metres in height. It has a narrow, pyramidal shape when young that broadens as it matures. It has blueish-grey, awl-shaped leaves 6-12mm long arranged spirally round the shoots and a reddish-brown, soft and fibrous trunk. Upright cones appear after flowering and when ripe, the reddish-brown cones (5-8cm) hang down. Ideally suited to being planted as a specimen in a large park or garden.

Position

Full shade, Full sun, Partial shade

Soil Types

Loam, Sand, Clay

Max Height

Higher than 12 metres

Max Spread

wider than 8 metres

Size

Time to Maturity: 20–50 years
Max Spread: wider than 8 metres
Max Height: Higher than 12 metres

Growing Conditions

Loam Sand Clay

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

Position

Full shade Full sun Partial shade

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

Colour & Scent

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Cupressaceae
Native to GB/Ireland: No
Foliage: Evergreen
Habit: Bushy
Genus: Sequoiadendron is a tall evergreen tree with soft, red-brown bark, flame-shaped when young, becoming more irregular with maturity. Short awl-shaped leaves are arranged spirally on the shoots, and ovoid cones become red-brown when mature
Name Status: Accepted

How to Grow

Cultivation

Grow in moderately fertile, well-drained soil in full sun or light dappled shade. See conifer cultivation

Propagation

Propagate by seed in containers in a cold frame in spring. Root softwood cuttings in summer or semi-ripe cuttings in late summer

Suggested planting locations and garden types

Architectural
Low Maintenance

Pruning

No pruning required

Pests

Generally pest-free

Diseases

May be susceptible to honey fungus in gardens where it is present but insufficient data to determine degree of susceptibility