Sequoiadendron giganteum
Wellingtonia, Mammoth tree, Big tree, Sierra redwood
- Height × spread
- 100m × 20m
- Position
- Full sun
- Hardiness
- Very cold to -20C (RHS H6)
Availability
Please ask in store about availability
Many plants are seasonal. Call 01234 567890 to check current stock.
About this plant
This is smaller than its relative Sequoia sempervirens, but stouter and heavier. The prime example in the United States is 'General Sherman', 84m (270ft) high, 25m (80ft) girth and said to be 3,000 years old. This tree makes a superb specimen. It is slim and elegant with slightly pendulous branches and close-pressed, scale-like needles held in sprays. The pinkish-brown bark is rather spongy and of little commercial value. Visually, the tree is beautiful, fast growing and quite commonly seen in Ireland and Britain.
- Foliage colour
- Green
- Stem colour
- Brown
- Variegated
- No
- Scent
- No
- Shape
- Cone
- Height
- 100m
- Spread
- 20m
- Height in 10 years
- 4.5m
- Spread in 10 years
- 2m
- Evergreen
- Evergreen
- Sun or shade
- Likes full sun, likes part shade, likes light shade
- Soil type
- Chalk, Clay, Loam (normal)
- Soil pH
- All types
- Drainage
- Moisture retentive soil, Well drained soil
- Hardiness
- Very cold to -20C (RHS H6)
- Borders & containers
- Borders
- Use for
- Architectural
- Hazards
- No
Spring
Spring - late · Outdoors
Feed young plants with slow release fertiliser
Spread a slow release fertiliser around the base of the plant to the edge of the foliage spread, so that it can feed the roots. It is helpful for this to be applied for several years.
This is a simple way to provide a nutrient boost until the plant becomes well established.
Spring-Autumn · Outdoors
Water to keep the soil moist
For best results, this plant needs soil that is always moist. Water deeply and regularly as soon as soil appears dry. Even for established plants in the ground, a dry week can cause problems with some soils. Check plants in pots more often, especially in hot weather. Or install an automatic irrigation system which will do the hard work for you, even when you are away on holiday.
Without regular watering some plants never fully regain their beauty.
Planting & general
Outdoor planting · Planting
Add root growth stimulant to the planting hole
Mycorrhizal fungi helps roots establish quickly, so they absorb water and nutrients more efficiently. It comes as a powder, granule or gel. Add to the planting hole or container, and to the plant's rootball before planting in the hole. For "bareroot" plants use a gel.
Planting
Protect & support young trees
Attach a newly planted tree or tall shrub over 1m to a tree stake to give support and prevent windrock. Use a tree guard to stop tree bark being eaten by animals, especially in areas with deer - removing bark injures a tree and in worst case can kill it.