Dwarf Japanese Larch Larix kaempferi 'Nana' Neumann

Water

The Dwarf Japanese Larch (Larix kaempferi 'Nana') should be watered regularly to maintain a consistently moist soil environment, especially during its growing season in spring and summer. It's best to water deeply once a week, providing about 1-2 gallons of water each time, depending on the size of the plant and the weather conditions. In hotter, dryer periods, more frequent watering may be necessary to prevent the soil from drying out. During the winter months, reduce watering as the plant's water requirements decrease.

Light

The Dwarf Japanese Larch thrives in full sun, meaning it needs at least 6 hours of direct sunlight daily. An ideal spot would be in an open garden or yard where it's exposed to unfiltered sunlight for most of the day. This species can tolerate some light shade, but too much shade can lead to sparse growth and reduced vigor.

Temperature

The Dwarf Japanese Larch can survive in temperatures as low as -30°F and as high as about 90°F. However, the ideal temperature range for this plant is between 60°F and 75°F. The Dwarf Japanese Larch is quite cold-hardy and adapts well to seasonal changes typical of temperate climates.

Pruning

Prune your Dwarf Japanese Larch to maintain shape and remove any dead or damaged branches. The best time for pruning is in late winter or early spring before new growth starts. Light pruning can be done annually, but significant shaping should be done infrequently, as the plant generally maintains a good shape naturally.

Cleaning

As needed

Soil

The Japanese Larch 'Nana' prefers a well-draining acidic to neutral soil mix, with a pH range of 5.5 to 7.0. Incorporate organic matter such as peat moss or compost to ensure good drainage and fertility, and consider adding pumice or perlite to enhance aeration. Ensure that the soil mix retains moisture without becoming waterlogged to promote healthy root growth.

Repotting

Japanese Larch 'Nana' should be repotted every 2 to 3 years to encourage healthy growth. Younger plants may need more frequent repotting, while older, established plants can be repotted less often. It's best to repot in early spring, before the onset of new growth, to minimize stress to the plant.

Humidity & Misting

Japanese Larch 'Nana' thrives in moderate to high humidity levels but is adaptable to various humidity conditions outdoors. To maintain optimal health and foliage, aim for humidity levels above 50%. In an indoor setting, it may benefit from occasional misting or a nearby humidifier to replicate its preferred environment.

Suitable locations

• Indoor

  Place in bright, indirect light and ensure good air circulation.

• Outdoor

  Plant in full sun; shelter from harsh winds; well-draining soil.

• Hardiness zone

  5-7 USDA

Life cycle

Larix kaempferi 'Nana', also known as Dwarf Japanese Larch, begins its life as a seed, which after stratification, germinates in the spring. The seedling then grows and develops into a young plant, exhibiting rapid growth in its early years and forming a dense, conical shape. As the dwarf shrub matures, it reaches a height and width of typically 3-5 feet, much smaller than the species norm, and maintains a well-rounded, compact form. Throughout the years, the Dwarf Japanese Larch produces needle-like leaves that are bright green in spring, turning golden yellow in autumn before they are shed, as it is a deciduous conifer. The plant reaches reproductive maturity and starts producing cones after a few years, with small, rounded female cones and elongated male cones that release pollen. The Dwarf Japanese Larch can live for several decades, after which it will eventually decline in health and die, completing its life cycle.

Propogation

• Propogation time

  Spring-Early Summer

• Propogation: The Japanese Larch 'Nana', scientifically known as Larix kaempferi 'Nana' Neumann, can be propagated through softwood cuttings. This method is often considered the most popular and is typically conducted in late spring to early summer. To propagate, cuttings of about 4 to 6 inches (10 to 15 centimeters) are taken from the current year's growth. The lower needles should be removed, and the cut end dipped in rooting hormone to facilitate root development. The prepared cuttings are then placed in a well-draining soil mix and kept consistently moist under a humidity dome or in a propagator to maintain high humidity. It is crucial to provide the cuttings with warmth and indirect sunlight until rooting occurs, which often takes a few weeks to a couple of months, after which they can be gradually acclimated to outdoor conditions.