Japanese laurel
Japanese laurel, or Aucuba japonica, is an evergreen shrub with a broad, upright habit. It is part of the Garryaceae family originating in Japan and western China. With glossy, dark green leaves about 8 inches long, Japanese laurel is popularly grown as a hedge or low screen, but also could be pruned and shaped as a small tree. Its clusters of small yellow flowers appear in late winter or early spring. Aucuba is a shade loving plant, but will maintain its deep emerald color in dappled shade to partial sun.
Water Japanese laurel frequently and consistently since this plant is not very drought tolerant. A general rule of thumb for watering is to keep the soil evenly moist by watering when the top couple inches of soil feel dry to the touch. It is important to note that Japanese laurel should not be over-watered as it can cause root rot.
When it comes to Japanese laurel's light preference, it is best suited for partial shade to indirect sunlight. This plant will thrive in deep shade, but the new growth will be lighter and will not have the same rich dark green coloring that is desired. When introducing the plant to direct sunlight, it should be done slowly to give the plant time to adjust. Direct sunlight in the summer time is not ideal, as foliage will scorch or turn yellow.
Japanese laurel is particularly hardy and will grow in climates with temperatures ranging from 15F to 75F (-9 to 24C). It prefers more moderate climates, and temperatures on either side of this range may cause foliage discolouration or even death of the plant.
Japanese laurel prefers a humid environment, so misting the foliage in dry conditions is recommended. It is best to avoid dry air from heaters and air conditioners, as this will cause the foliage to dry out and drop prematurely. Humidifiers will help the plant retain moisture and will promote healthy growth.
Japanese laurel prefers slightly acidic soil with a pH of 6.7. The soil should be kept evenly moist and be composed of equal parts peat moss, humus, and loam. Adding a slow-release fertilizer is also recommend to promote growth.
Japanese laurel should be fertilized in the spring when it is actively growing. The best type of fertilizer to use is a complete slow-release fertilizer, which will provide a continuous supply of the essential nutrients it requires throughout the season. Water the plant after fertilizing, and repeat every 6-8 weeks throughout the growing season.
Japanese laurel is particularly resistant to pests, but this doesn't mean it will go entirely free from pests. Common pests associated with the Japanese laurel are aphids, scale, and spider mites, which will cause discolouration and disfiguration of the foliage. Treatment for these pests should be done immediately with an insecticidal soap or horticultural oil spray. Be sure to apply them early in the morning or later in the evening when temperatures are cooler. Foliar sprays should be sprayed on both upper and lower surfaces of the foliage to ensure efficacy.
Japanese laurel does not need frequent repotting. Young plants should be repotted once a year in the spring. As the plant matures, it should be repotted every two to three years. When repotting, opt for slightly larger pots and use a well-draining soil.
Pruning for Japanese laurel is important for shaping and maintaining its attractive form. Prune in spring, summer, and fall to keep the plant compact. Also, pruning may be necessary to remove dead, damaged, or diseased foliage. When pruning, use clean and sharp blades and make sure to follow the natural growth pattern.
Mulching is recommended for Japanese laurel, based on your climate and season. In colder climates and/or winter seasons, opt for an organic mulch for insulation against temperatures and frost. In the summer months, a light layer of inorganic mulch is preferable to reduce evaporation of moisture.
Japanese laurel can be propagated by cuttings or layering. Taking 6” cuttings and rooting them in moist soil is the most successful way to propagate this shrub. This should be done in the summer months when the plant is actively growing. Alternatively, layering involves burying the tip of the branch in the soil in early summer. Roots will form along the buried branch, which you can then sever in the late fall.
Japanese laurel does not require support, as its upright habit makes it an ideal candidate for container gardening. If you intend to grow it as a tree, you may need to provide a support when it is first planted.
In cooler climates, this plant may go dormant in the winter. During this time, water your Japanese laurel sparingly. In areas without a cold winter, or during the summer, make sure there is always just the right amount of moisture in the soil to prevent any water stress.
Japanese laurel is not toxic to pets and other animals. The flowers and leaves of the plant are edible, as well, and can be used in salads or tea.
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