Pinus strobus 'National Life' (National Life White Pine)


Michael's Opinion

A beautiful accent or specimen plant with variegated bright yellow foliage. Planting in too much shade will cause it to revert back to the dark green of the straight species Pinus strobus.

Botanical Information

FamilyPinaceae
GenusPinus
Speciesstrobus
Cultivar'National Life'
CategoryWoody
TypeTree (evergreen), Shrub (evergreen)
ReferencesDirr, Michael. "Pinus strobus." Dirr's Encyclopedia of Trees and Shrubs. Portland: Timber Press, 2011. Print.
Pronunciation

Details

USDA Hardiness Zone3
USDA Hardiness Ref.
Canadian Hardiness Zone3
Canada Hardiness Ref.
RHS Hardiness Ref.
Temperature (°C)-40
Temperature (°F)-40
Height1 m
Spread50 cm
GrowthSlow
Flowering PeriodNovember

Description and Growing Information

General DescriptionA variegated bright yellow, slow growing pyramidal conifer.
ID CharacteristicDiffers from Pinus strobus in that it is bright yellow in colour and much smaller in size.
ShapePyramidal.
LandscapeAccent planting, not appropriate for mass planting. Can be sheared into a small hedge.
PropagationPropagation can be achieved by rooting stem tip cuttings, using juvenile cuttings is best. The best time to take cuttings is late autumn. The cuttings will root best with intermittent mist with a soil temperature of 24°–27°C. Rooting will take about 16–22 weeks. Use of IBA TALC 8000 ppm rooting hormone is recommended.
CultivationThis cultivar requires full sun to partial shade. It will grow well in sandy, loam, acidied and well drained soils.
PestsNo known pests or diseases.
Notable SpecimensWhistling Gardens, Wilsonville Ontario, Canada.
HabitatHorticultural origin.
Bark/Stem DescriptionBark is thin and smooth. Greyish green in colour when young, becoming darker with age. On old stems the bark is dark greyish and deeply furrowed longitudinally into broad scaly thick ridges of about 2.5–5 cm.
Flower/Leaf Bud DescriptionBuds are 50 mm in length and are resinous. They are ovoid with a sharp point and some scales free at the tips.
Leaf DescriptionNeedles are slender, about 5–10 cm in length arranged in fascicles of five. They are soft and pliable, with finely toothed margins; the sheath is about 1.25 cm in length, falling away. Foliage is variegated bright yellow.
Flower DescriptionCones are sub terminal and pendant about 8–18 cm in length and are about 4 cm broad. Cones are stalked, cylindrical, often curved with a pointed resinous apex light brown in colour. Cones mature in autumn of the second year.
Fruit DescriptionCones are sub terminal and pendant about 8–18 cm in length and are about 4 cm broad. Cones are stalked, cylindrical, often curved with a pointed resinous apex light brown in colour. Cones mature in autumn of the second year.
Colour DescriptionVariegated bright yellow foliage, greyish green bark, and light brown cones.
Texture DescriptionMedium-fine textured.

Photographs