Japanese Lilac Tree (Syringa Reticulata) Care & Propagation Guide

Written by Ivy

Jan 29 2023

Japanese Lilac Tree (Syringa Reticulata) Care & Propagation Guide
Japanese Lilac Tree (Syringa Reticulata) is native to northern Japan. Plants are observed developing on cliffs and in the scrub, commonly on limestone. The Olive or Oleaceae household additionally incorporates privet and forsythia. Syringa has about 30 species of bushes and shrubs native to Europe and Asia. Japanese Lilac Tree is the sole species that attains a tree-like shape and size.

Japanese Lilac Tree Quick Info

Botanical/Scientific Name Syringa Reticulata
Common Name Japanese Tree Lilac
Varieties Japanese lilac tree, Chinese lilac tree, Amur lilac tree
Uses Trees are excellent for use as specimens, in group planting as a screen, and as street trees.
Origin Eastern Asia
Light Care Full sun
Soil Care Well-drained soil and indirect light
Temperature Care Not temperature sensitive
Humidity Care Moisture Humidity
Watering Deep watering every 7-10 days.
Pruning Care Prune away all but 6 to 12 major stems
Fertilizer Care Compost, composted manure, or a balanced chemical fertilizer
Propagation Hormone rooting powder
Toxic Lilacs do not contain any chemicals that will poison animals or humans

Japanese Lilac Tree Care in Detail

Japanese Lilac Tree Care & Propagation Guide

Japanese Lilac Tree Watering

We should water Japanese lilac tree once after planting, and then water it every 10 days or so, and then drain it in time to avoid ponding and rotten roots. When the peak growth season from April to June comes, pay attention to increasing water penetration two or three times a month to prepare for flowering. When it is hot in midsummer, there will be more rainfall. We should pay attention to the drainage of Japanese lilac tree.

Japanese Lilac Tree Soil

Japanese lilac tree likes loose, fertile, moist and well drained soil. Japanese lilac tree cultivation soil can be mixed with humus soil or pastoral soil with an appropriate amount of sandy soil. It is not allowed to be sticky, wet or fat. The grafted Japanese lilac tree plants can be transplanted in pots from February to march in spring. Pay attention to trimming the root system, leaving more fibrous roots to make the root system stretch in the basin. The loam should be compacted to make the root closely connected with the soil. The covering soil of Japanese lilac tree shall be 3 ~ 4cm lower than the basin mouth, poured with water, placed in the shade, and then moved to the place with sufficient light. Japanese lilac tree bonsai should use medium deep pottery basin or glazed pottery basin.

Japanese Lilac Tree Light

Japanese lilac tree is a plant that likes sunshine. Of course, it can be exposed to the sun. It is best to plant it in a place with plenty of light. Japanese lilac tree has different requirements for light in different seasons. It is in the growth period in spring and autumn. It can not be placed outdoors, but also on the balcony or in a place with good indoor sunshine. In summer, the light is relatively strong, which can block part of the sun and only contact astigmatism. In winter, we can directly put Japanese lilac tree in the sun.

Japanese Lilac Tree Temperature

Japanese lilac tree has certain cold resistance. The cold resistant temperature is about 3 ℃. When the temperature in winter is lower than 1-2 ℃, Japanese lilac tree will suffer frostbite. For potted Japanese lilac tree, it will suffer frostbite at almost 3 ℃. After the temperature drops in winter, we should do a good job in keeping warm and antifreezing, especially in the north. The suitable temperature of Japanese lilac tree is about 15-20 ℃. It likes to be warm.

Japanese Lilac Tree Humidity

Japanese lilac tree can't stand waterlogging, so you must control the water volume. Once you water too much or suffer a rainstorm, you must pay attention to drainage. Because too high humidity will cause the death of the whole plant of Japanese lilac tree.

Japanese Lilac Tree Fertilizer

Firstly, the planting soil of Japanese Lilac Tree is required to be fertile, loose and well drained. There are enough nutrients in the soil to meet the growth needs of Japanese lilac tree. In the process of clove growth, it is necessary to apply fertilizer in time. Japanese lilac tree does not like large fertilizer. Excessive fertilization will cause excessive growth of branches and leaves, and flower buds are difficult to form due to lack of nutrients, resulting in reduced flowering. Therefore, fertilization is very important.
Japanese lilac tree should supplement nutrients in time after flowering to promote plant recovery, and supplement nitrogen, phosphorus and potassium appropriately. Usually, each plant has about 75g phosphorus and potassium fertilizer and 25g nitrogen fertilizer. Pay attention not to excessive nitrogen fertilizer, otherwise it will affect the flowering of the next year.
In addition, generally every year or every other year, before winter, we should apply rotten compost to Japanese lilac tree to supplement the nutrients in the soil so that Japanese lilac tree can survive the winter safely.

Japanese Lilac Tree Pruning

The whole pruning of Japanese Lilac Tree is to create the appearance of lilac. As the saying goes, "take the essence and remove the dross", the dross is the dead branch on the lilac flower, and there are still branches in the branches. Anyway, if they are not healthy growth branches, or the branches that affect the overall beauty are pruned. At the same time, it should be noted that our focus in pruning the Japanese lilac tree is not only the shape, but also to make it bloom more and more beautiful.
If the Japanese lilac tree has twigs and aged thick branches, they also need to be pruned because the twigs can not bear too many flowers and will not grow too many flower buds. Taking them out can reduce unnecessary nutrient consumption and allow nutrients to be transmitted to other branches. Similarly, the old branches do not participate in the flowering task of the next year and need to be pruned. This step is also for the reasonable density between the branches of lilac, which is more conducive to growth.
The growth environment of Japanese lilac tree is also very particular. A well ventilated environment can not only make the branches stronger, but also make the flowers more brilliant. When human beings regulate their bodies, they pay attention to the combination of inside and outside, so Japanese lilac tree is no exception. In addition to starting from the outside, the internal branches also need to be taken care of in order to create a better ventilation environment. We all know that no matter what plant it is, if it is not taken care of, the branches will extend disorderly, dense and disorderly.

Japanese Lilac Tree Repotting

Because the roots of lilac are relatively strong, we usually choose the Japanese lilac tree replacing flowerpot. We should choose some deep pottery pots or porcelain pots, which can make the root of lilac develop better and absorb nutrition. There are many people who plant lilacs in pots that are not suitable for its growth simply for personal preference, so they must not grow well. We raise flowers for viewing, but on the premise of viewing, we must let the Lilac Fairy survive before we can watch and decorate.
Japanese lilac tree replacement is generally in spring and autumn. When you put the pot on, you can take the plants out of the pot directly, and then trim the roots properly. In this way, the roots of the whole plant will be more stretched. Then prepare the soil. When selecting the soil, we can buy some nutritious soil in the market, which is more convenient. During Japanese lilac tree replacement, we can also add some ceramsite or river sand to increase drainage and permeability. Here, I need to remind you that before Japanese lilac tree replacement, we must closely combine the soil and roots. You can wrap a layer of soil around the roots of lilac first, and then put it into the pot, Then pour it into a warm and ventilated place and wait for time to survive successfully.

Japanese Lilac Tree Pest & Disease Control

Clove Spot

  • Symptom
This Japanese lilac tree disease mainly occurs on leaves, and different degrees of diseases will show different degrees. It is mainly divided into four types: Star spot, spot spot, flower spot and scorch. According to the severity of the disease, the spots will change in turn. In severe cases, the whole plant will die.
  • Control Method
We should pay attention to watering the Japanese lilac tree to keep the basin soil moist without ponding. When placed outdoors for curing, pay attention to rain protection or timely drainage. When this Japanese lilac tree disease occurs, it can be sprayed with chemicals in time. Bordeaux liquid can be diluted and sprayed with low concentration. It can be sprayed 3 ~ 5 times.

Clove Powdery Mildew

  • Symptom
This Japanese lilac tree is very common. When it comes to disease, sporadic spots will appear on the leaves, and then gradually expand. The leaves will be covered with white mold layer and hyphae. Finally, the white mold layer will become a white sparse network, and small black particles will appear one after another until the plant dies.
  • Control Method
In view of this Japanese lilac tree disease, we should trim in time, remove the fallen leaves, cut off the diseased branches and thin branches, and prepare for the winter. During the growth period, the over dense branches shall be trimmed to facilitate ventilation and light transmission. Spray the agent in time before the onset of the disease, and you can choose 50% Triadimefon or benlat. Spraying is the most effective and fastest solution.

Clove black spot

  • Symptom
This Japanese lilac tree mainly endangers the leaves. Round or irregular disease spots appear on the leaves, which are brown or dark brown with wheel patterns. Black molds will appear on both sides of the disease spot, and the disease spot will gradually expand, resulting in the defect of the whole leaf.
  • Control Method
After the Japanese lilac tree leaves, we should clean up the dead leaves in time to reduce the source of infection. Spray the agent in time. You can choose chlorothalonil powder, dilute it with water and spray it.

Japanese Lilac Tree Propagation

Japanese Lilac Tree Care & Propagation Guide

Can You Root Japanese Lilac Tree Cuttings in Water?

Some Japanese Lilac Trees increase roots rapidly in a glass of water on a sunny windowsill, however this exercise isn't always commonly encouraged for lilacs. If you prefer to supply it a try, take a slicing from a wholesome lilac and vicinity the stem in a clear or amber glass or jar with 1 to two inches (3-5 cm.) of water. Be positive to strip the leaves from the section of the stem that will be in the water to preserve the reducing from rotting. Add sparkling water as needed. If the stem develops roots, plant the slicing in a pot and let it mature till the younger plant is properly established, then pass it outdoors.

Japanese Lilac Tree Division Propagation

Take a 4- to 6-inch softwood leafy reducing in the spring late spring to early summer. Use a pair of sharp pruning shears and make the reduce at a 45-degree angle. Chose a Japanese Lilac Tree reducing that has green, supple wooden and at least two leaves on it.
Fill an 8- to 10-inch planting pot with equal components sand and potting soil or buy a rooting combine from your neighborhood backyard store.
Roll the backside inch of your lilac slicing in hormone rooting powder for gentle cuttings. Hormone rooting powder can be determined at most nurseries. Avoid formulation for ripe or hardwood cuttings as they will be too robust for the soft inexperienced wood.
Make a 2-inch deep gap in the middle of your planting pot; you can use a pencil, dowel or your index finger.
Place the slicing in the planting pot and press the soil down round it. Water the pot till the soil is evenly damp.
Place a clear plastic bag over the slicing and impenetrable the pinnacle of the bag round the rim of the pot with a rubber band or string. This will create a mini greenhouse and will preserve the surroundings around your slicing humid whilst it develops a new root system.
Put the reducing in an region that receives dappled shade; keep away from full solar at this stage due to the fact it will poach the gentle slicing in Japanese Lilac Trees greenhouse.
Check the soil in the pot each few days; the soil must be damp however no longer saturated. When the soil starts offevolved to sense barely dry on top, cast off the bag and water the cutting. Replace the bag when you are completed watering.

Japanese Lilac Tree Varieties

The Japanese lilac tree, or Syringa reticulata, is categorized as each a massive shrub and a small tree. This decorative has creamy white plants that fill the summer time air with their ample floral fragrance. As its identify suggests, the Japanese lilac is native to Japan. It grows abundantly in cool climates however can go through in warm climates. USDA planting zones four to 7 are perfect for developing and propagating a Japanese lilac. While propagation from seed is possible, seeds do no longer usually develop genuine to the father or mother tree. Propagation from a reducing is the pleasant way to reproduce your Japanese lilac.

Japanese Lilac Tree Benefits

If you choose an magnificent tree for a parkway or street, plant these beauties between the sidewalk and roadway. These Japanese Lilac Tree can cope with salt and pollution, and they make a ideal alternative for city or business spaces. Large parks will additionally advantage from the addition of the Ivory Silk. With these trees, you can count on many admirers to come and respect the splendor and scent of the Ivory Silk Japanese Lilac Tree.
This small tree produces foot-long flower panicles in late June. After different Japanese Lilac Tree have completed blooming for the season, these timber proceed to flower. Your panorama will bloom with creamy white vegetation that produce a candy scent in the early summer. Once the blooms have finished, revel in the lovely coloration from the Ivory Silk's giant leaves. During the summer, the darkish inexperienced foliage is a astonishing sight. When this lilac drops its leaves, you will fall in love with the captivating brown bark. This bark also provides some texture and dimension to your wintry weather landscape.

Japanese Lilac Tree Care FAQs

Japanese Lilac tree size

Japanese Lilac Tree grows 20 to 30 toes tall with a unfold of 15 to 25 feet.
The increase price of a Japanese lilac tree, Syringa reticulata, is viewed to be reasonable through college extension services. It flourishes properly in U.S. Department of Agriculture plant hardiness zones three thru 6, with some success in region 7. Cultivars of the Japanese lilac encompass Ivory Silk and Summer Snow.
A massive shrub or a small tree, the Japanese lilac adorns itself with white plant life for the duration of the summer season months. The annual increase price of the tree is 12 to 18 inches. Although a member of the lilac family, the white look of the tree differs drastically from the purplish hue generally related with lilacs.
Due to its average increase price and size, the Japanese lilac is used as a road tree, specifically when overhead electricity traces are present. It is additionally regarded best for decorative gardens, decks and patios. The boom price of the tree can be affected by means of pests like lilac borer larvae.

White Japanese Lilac tree

White Japanese Lilac tree's Flowers are creamy-white and borne in lengthy panicles up to 12 inches lengthy at the ends of the branches. The truly aromatic flower clusters bloom in early summer season and continue to be pleasing for 1 to two weeks. Pollination is via insects, along with hawk moths.
The fruit of white japanese lilac tree is a brown, warty, dry tablet that is ¾ inch-long. Capsules incorporate two winged seeds. The tablets show up in massive clusters that stay on the plant via winter. The fruit is a cluster of drugs containing seeds that are scattered via wind.

Japanese Lilac tree problems

Japanese lilac timber (Syringa Reticulata) are low-maintenance bushes that emit a beautiful heady scent and are well-suited for a range of stipulations together with city areas, residential neighborhoods and drought.
A frequent hassle related with Japanese lilac timber is incidence of wooden rot and decay.
Where there is fungus, a Japanese lilac tree might also be experiencing indoors decay inside the trunk or branches even though the tree seems to be fairly healthy.
Symptoms encompass wilted stems and stems that are swollen at the base; the tree's bark might also pull away from the tree. Since borers most usually infest bushes already injured or in decline, the first line of protection is maintaining your tree healthful thru ideal care. Remove and smash contaminated plant parts. For chemical control, follow the insecticide permethrin, as advocated by using the Kansas State University Research and Extension.
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