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Picea sitchensis Tenas - Sitka spruce

Picea sitchensis Tenas
Sitka spruce, Tideland spruce

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A true little ball, with a glaucous blue colour, absolutely charming. Its slow growth, of 7 to 8 cm per year, allows it to reach 80 cm in all directions at 10 years old and up to 2 m eventually, with a more conical habit. Its very dense needles display a beautiful bright blue-green colour. Plant it in a small garden, a rockery or a large pot. For moist, well-drained soil, not too chalky, in a sunny exposure.
Height at maturity
80 cm
Spread at maturity
80 cm
Exposure
Sun, Partial shade
Hardiness
Hardy down to -23.5°C
Soil moisture
Moist soil
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Best planting time February to March, October to November
Recommended planting time February to June, September to November
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Description

Picea sitchensis 'Tenas' is a dwarf Sitka Spruce, very compact, with a globose habit. It offers a beautiful colour, with its bright blue-green needles. It first forms a small rounded ball, then with age, slowly acquires a more conical silhouette. The density of the needles and the perfectly round shape give it an unusual appearance. It integrates well into small gardens and enlivens rockeries and pots on the terrace. It is a very hardy, undemanding small conifer which does not require pruning. It thrives in well-drained, but moist, ordinary soil, and a sunny exposure.

Picea sitchensis, also known as Sitka Spruce, is a plant from the pinaceae family. Native to the west coast of the United States, it owes its name to the locality of Sitka, located in Alaska. It is a very hardy species, accustomed to cold and humid climates in summer. In its natural environment, which is often very harsh, this fast-growing tree can exceed 40 m in height, and shows a pyramidal habit with age, and whorled branches. This spruce is one of the few that can tolerate transplantation at a young age. It is very tolerant of soil pH.

The 'Tenas' variety is distinguished by its truly spherical shape and the density of its needles, a beautiful glaucous blue, tinged with bright green. Its growth is very slow, around 7 to 8 cm per year. A 10-year-old specimen does not exceed 80 cm in all directions. Ultimately, it reaches a maximum height of 1.80 m to 2.20 m. It produces thin and stiff branches, very close together, directed upwards. They are covered with fine, flat and stiff needles, arranged radially around the branches. They are bluish-grey-silver in spring, then become greenish-blue over the seasons.

The dwarf Sitka Spruce 'Tenas', rather easy to grow, adapts to many climates, as long as the soil is well-drained and moist. It has a structured silhouette. Its reduced development allows it to be planted in gardens of all sizes, in a small bed or rockery scene. Combine it with other dwarf conifers with different coloured foliage, dark green, yellow-green, developing other silhouettes, with a prostrate, conical, columnar habit. Evergreen conifers are very aesthetic and have interesting architectural qualities for all gardens, especially contemporary gardens, which are more radical in their choice of silhouette and foliage. Play with volumes and colours by associating them with flowering shrubs, ground cover plants.

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Spruces, Picea: planting, pruning and care
Family sheet
by Eva 13 min.
Spruces, Picea: planting, pruning and care
Read article

Plant habit

Height at maturity 80 cm
Spread at maturity 80 cm
Habit ball, spherical
Growth rate very slow

Foliage

Foliage persistence Evergreen
Foliage colour blue
Product reference • 20244

Planting and care

Picea sitchensis 'Tenas' can be planted from September to November and from February to June in ordinary, well-drained soil. It prefers moist to wet soil, and can tolerate slightly alkaline, neutral, or acidic conditions. Sandy, humus-bearing, or loamy soil is ideal. Choose a sunny spot or partially shaded. This variety is resistant to wind. Soak the root balls before planting. Add organic matter during planting and water generously during the first few years, especially during prolonged dry periods. Apply a special conifer fertiliser every year in April and weed the soil in summer. This hardy conifer (it can withstand temperatures as low as -30°C) can tolerate salty soils but is sensitive to heat and drought. Pruning is not necessary.

Planting period

Best planting time February to March, October to November
Recommended planting time February to June, September to November

Intended location

Suitable for Meadow, Rockery
Type of use Border, Edge of border, Free-standing, Container, Slope
Hardiness Hardy down to -23.5°C (USDA zone 6a) Show map
Ease of cultivation Amateur
Exposure Sun, Partial shade
Soil pH Any
Soil type Clayey (heavy), Silty-loamy (rich and light), Stony (poor and well-drained)
Soil moisture Moist soil, well-drained, fertile

Care

Pruning No pruning necessary
Soil moisture Moist soil
Disease resistance Very good
Overwinter Can be left in the ground

Planting & care advice

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