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Larix kaempferi Boring Weeper

Larix kaempferi Boring Weepe
Japanese Larch, Dunkeld Larch

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A deciduous conifer with weeping foliage reaching 2-3m in height and 90cm wide at the age of 12. Its trailing branches are covered in soft needles that are bright green with silver-blue highlights, turning yellow in autumn before falling. Its young cones are green or red, turning brown when mature. This larch is very hardy and thrives in a humus-bearing, neutral to acidic soil and a sunny exposure.
Height at maturity
3.50 m
Spread at maturity
1 m
Exposure
Sun, Partial shade
Hardiness
Hardy down to -23°C
Soil moisture
Moist soil
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Best planting time March, October
Recommended planting time February to May, September to November
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Flowering time March to May
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Description

The Larix kaempferi 'Boring Weeper' is a Japanese larch characterised by its weeping habit and moderate growth. It is a deciduous conifer with drooping branches covered in silver-blue-green needles from spring to summer, turning yellow in autumn. This larch also produces decorative young cones. It is very unusual and will be highlighted in the centre of a flower bed or as a solitary specimen in a small garden.

Larix kaempferi 'Boring Weeper' is very similar to the variety 'Stiff Weeping', but it was selected by a different breeder. The wild Japanese larch, Larix kaempferi (synonym Larix leptolepis), is a large Japanese conifer with a conical habit that can reach a height of 30m. It has deciduous foliage and is native to the mountains of the Hondo Island, but it adapts very well to cultivation in lowlands, in cool oceanic climates. It belongs to the pinaceae family, like pines, firs, and spruces. It is a very similar species to Larix decidua, the European larch. Very cold-resistant, the Japanese larch likes humus-rich, moist, and slightly acidic to neutral soils.

Larix kaempferi 'Boring Weeper' forms, after 10-12 years, a 2-3m tall weeping bush with a spread of less than 1m. Its growth rate is moderate. Its long branches, drooping to the ground, form a dense, but more or less regular, fountain shape. From spring to summer, its foliage is generally green-blue, composed of soft non-prickly needles. They are inserted in small dense clusters on the branches. In autumn, these needles turn golden yellow and then bronze before falling. Its young branches have an attractive winter bark, ranging from pale pink to brown. Flowering, on a mature specimen, occurs from March to May, starting before the appearance of the needles in spring. The tree produces male and female cones. The male cones are numerous, small, and yellowish, hanging under the branches. The female cones, on the other hand, are erect and have a beautiful bright red-pink colour before turning brown when ripe. In late summer, they release brown seeds that are enjoyed by squirrels and some birds.

The 'Boring Weeper' larch is a subtly unique conifer, easy to fit into a small garden or a Japanese-inspired or exotic-themed flower bed. It can also be planted near an entrance, as its narrow silhouette is well suited for it. It can also be grown in a large container to decorate a terrace or balcony. It can be combined with dwarf conifers chosen for their bushy or trailing habit. The architectural qualities of conifers naturally stand out in a contemporary garden. These plants provide long-lasting structure to a flower bed, mark pathways, and the terrace. They pair perfectly with heathers. The key is to play with volumes and colours.

Tips: Water regularly during the first two years and in case of prolonged drought.

Plant habit

Height at maturity 3.50 m
Spread at maturity 1 m
Habit weeping
Growth rate normal

Flowering

Flower colour insignificant
Flowering time March to May
Fruit colour green

Foliage

Foliage persistence Deciduous
Foliage colour green

Botanical data

Genus

Larix

Species

kaempferi

Cultivar

Boring Weepe

Family

Pinaceae

Other common names

Japanese Larch, Dunkeld Larch

Origin

Cultivar or hybrid

Planting and care

Larix kaempferi 'Boring Weeper' is a plant that thrives in cool mountain climates and is sensitive to arid conditions, heatwaves, and late frosts. It should be planted from September to November in well-drained soil that retains moisture, preferably without limestone, in a sunny or partially shaded location. A mixture of coarse sand, peaty soil, and compost added to the garden soil is suitable. If your soil is too heavy, a helpful tip is to plant your bush on a mound and mulch it with non-limestone gravel. Water regularly during the first two years and prolonged droughts. Soak the rootballs well before planting. This very hardy conifer also dislikes clayey, heavy, waterlogged soils. Pruning is not essential, but this conifer can be pruned to maintain or enhance its original shape in February-March.

The larch can be attacked by fungi such as Armillaria and the round disease (Ungulina annosa). Larch canker causes stem deformations, especially on injured or frost-sensitive trees, which is a serious problem for foresters. Yellowing of the leaves in spring (Méria laricis) weakens young specimens. Pests, such as tortrix moths, affect the shoots or foliage; aphids suck the sap from the needles and shoots, causing them to dry out.

Planting period

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

Intended location

Suitable for Meadow, Woodland edge
Type of use Free-standing, Container
Hardiness Hardy down to -23°C (USDA zone 6a) Show map
Ease of cultivation Amateur
Planting density 1 per m2
Planting spacing Every 100 cm
Exposure Sun, Partial shade
Soil pH Acidic, Neutral
Soil type Silty-loamy (rich and light), Stony (poor and well-drained)
Soil moisture Moist soil, well-drained

Care

Pruning instructions Pruning is not essential, but this conifer can be pruned to maintain or enhance its original shape in February-March.
Pruning Pruning recommended once a year
Pruning time February to March
Soil moisture Moist soil
Disease resistance Good
Overwinter Can be left in the ground

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