Juniperus procumbens (Japanese Garden Juniper, Bonin Island Juniper)


Michael's Opinion

One of the nicer junipers, widely available and quite common. Its foliage makes it stand out in the landscape, especially in the winter. It can be found in topiary, standard and regular groundcover forms.

Botanical Information

FamilyCupressaceae
GenusJuniperus
Speciesprocumbens
CategoryWoody
TypeShrub (evergreen)
ReferencesMost garden centres.
Pronunciation

Details

USDA Hardiness Zone 4-9
USDA Hardiness Ref.
Canadian Hardiness Zone4-9
Canada Hardiness Ref.
RHS Hardiness Ref.
Temperature (°C)-35C
Temperature (°F)-30F to -35F
Height80 cm
Spread2 m
GrowthSlow

Description and Growing Information

General DescriptionExcellent groundcover juniper for rock gardens, and provides winter interest in any garden. Can grow to be very wide spreading but is easily pruned and trained. Can also be easily grown in many types of soil, but requires full sun.
ID CharacteristicNeedles are blue-green, sometimes with a greyish tinge, found in groups of three. Has stiff, low lying, and spreading procumbent branches.
ShapeLow lying, broad spreading, with procumbent growth.
PropagationPropagated from cuttings, rooted under mist. Cuttings should be taken after several hard frosts, so any time before spring is acceptable. Can be done from seed, but is more difficult.
CultivationPlant in full sun. Will tolerate a wide variety of soils and drought, and is somewhat pH adaptable.
PestsPhomopsis twig blight can be a problem, although they are relative pest and disease free.
Notable SpecimensThe University of Western Ontario, London, Ontario.
HabitatNative to Japan, often found in mountainous areas, in dry, rocky soil.
Bark/Stem DescriptionReddish brown and slightly exfoliating. Not visible because of its dense foliage and thus has little aesthetic value
Leaf DescriptionBlue-green needles, nearly 1cm long, grouped in threes.
Flower DescriptionDioecious species, bears small cone-like flowers in May or June.
Fruit DescriptionSmall blue-black berries, 0.5cm in diameter, found only on female plants. Deer often eat them.
Colour DescriptionBlue-green, sometimes almost grey. Keeps colour throughout the year, sometimes with a purplish hue in winter.
Texture DescriptionMedium, fairly neutral in the landscape.

Photographs