Dwarf Syringa meyeri var. spontanea, often known as Korean lilacs, are deciduous shrubs that bloom in the spring with cone-shaped clusters of fragrant purple flowers. Because they need chilly winters to thrive, they are typically hardy in U.S. Department of Agriculture hardiness zones 3 to 7. However, there are hybrid lilacs that can flourish in zone 8 environments with temperate Mediterranean winters. If you want to transplant a shrub that is currently growing in your zone 8 yard, you should do it in February while the shrub is dormant.
As soon as the shrub’s leaves have fallen in the fall, root prune it. To mark the outer edge of the desired rootball, use a garden hose. For a 4-foot-tall shrub, draw a circle with a diameter of 16 inches; for a 6-foot-tall shrub, draw a circle with a diameter of 20 inches. With a dirt shovel, create a 1-foot-deep trench around the plant, just outside of the garden hose. Separate the topsoil from the subsoil. Refill the trench with soil, subsoil first, and then water it to flush out any air pockets.
Choose a new location for planting where the shrub will receive at least six to eight hours a day of direct sunlight. To provide enough airflow, choose a space that is 2 to 4 feet wider than the shrub’s predicted maturity width.
Remove any grass or weeds that are present, then use a rototiller to loosen the soil 10 to 12 inches deep. To enhance the soil’s fertility and texture, add a 3- to 6-inch-deep layer of compost, well-aged cow manure, and leaf mold.
Just before excavating the shrub at the new place, create a planting hole that is 2 to 2 1/2 feet broad by 1 foot deep. If the soil is hard clay, rake or shovel the bottom of the hole.
Around the lilac, remove the dirt from the trench used for root pruning. Using a pointed spade, remove soil from the bottom of the root mass at a 45-degree angle to form the bottom of the rootball. To cut the roots below the root mass, use a shovel to dig a hole. Pull a piece of plastic sheeting up around the stems and slide it under the rootball.
By pulling up on the rootball, remove the shrub from the hole and move it to the new planting location. Place it in the hole for planting. If required, pull the shrub back out of the planting hole and adjust the depth until it is planted at the same level at which it was growing before. Slide the plastic out from underneath it before inserting it back into the hole.
Surround the shrub’s roots with backfill. The soil should be covered with 1/2 gallon of water once the hole is halfway full. Complete the backfilling process, then add another 1/2 gallon of water to the loose soil to compact it around the roots.
Mulch the soil around the shrub with a 3-inch layer, but keep it 3 inches away from the stems. To keep the soil evenly moist, keep watering the newly planted lilac once or twice a week as necessary. Keep the ground barely damp, not muddy.
How should a lilac bush be planted for optimal results?
3. Take the plant out of its pot and place it in the hole. Make sure the top of the root ball is about an inch or more above the soil surface.
4. Apply the soil mixture all the way around the root ball, pressing it down firmly.
5. Take a long drink.
6. Mulch the area you just planted to a depth of 2 inches, being careful not to pile mulch up against the base of the plant. This will help keep the soil moist and prevent weeds from sprouting by denying them access to sunlight.
How to Water Lilacs
After planting, monitor your plants frequently, and water them once or twice a week, or anytime the top inch of soil becomes dry. While watering, count to 10 to make sure you’re providing each lilac plant with enough moisture. (If the plant becomes too dry, the leaves will start to droop.) You can reduce watering to every other week once plants have been planted and have had a few months to establish themselves. Lilacs won’t require additional water during the second growing season or later unless there hasn’t been rain in your location for a month or more.
How to Feed Lilacs
Lilacs should be fed Miracle-Gro Shake ‘n Feed Flowering Trees & Shrubs Plant Food after they have bloomed in the spring to encourage the development of robust roots. This plant food is jam-packed with nutrients for your plants, including kelp, earthworm castings, feather meal, and bone meal. These ingredients nourish soil bacteria, which in turn break down organic matter into nutrients for your plants.
How to Help Prevent Disease Problems with Lilacs
Powdery mildew is the main problem with lilacs, especially common lilacs. What’s the best approach to prevent this? Purchase and plant lilac cultivars that resist powdery mildew (check the plant tag or online description). Lilacs benefit from being planted in areas with good airflow. This fungus disease won’t respond to spraying, and it will finally go away on its own.
How to Deadhead Lilacs
Be sure to deadhead young lilacs as they start to bloom (this could take a few years!). Deadheading involves clipping off faded flowers at the base as soon as they start to droop and fade. In response, the plant will use more energy developing new flower buds for the upcoming spring.
How to Prune Lilacs
Although the newer, smaller lilac kinds require less trimming than the enormous conventional lilacs, all lilacs will grow more effectively and bear more flowers with regular pruning. Here are a few possibilities:
- Cut an older lilac shrub to 8 inches above the ground in late winter (March or April), then let it grow out if it isn’t flowering despite receiving plenty of sunlight. The following March, choose 8 to 10 of the best-looking stems, and reduce them by half. Trim the remainder to the ground. The following year, new blossoms should appear.
- Selectively prune 1/3 of the branches all the way back to the ground each year to revive shrubs that aren’t flowering well instead of chopping the shrub all the way down.
- Cut back branches to reduce size as soon as the shrub’s flowering has finished.
How is a Korean lilac tree transplanted?
You’re trying to figure out if you can move your lilac bush. You’ll be glad to learn that lilac bushes are simple to move. Lilac bushes rank among the easiest plants to transplant successfully, according to our research. We will outline the procedures for effectively transplanting lilacs in this article.
The simplest lilac bushes to transplant are the young ones. They are able to quickly adapt to their new environment and put down new roots thanks to their strong, youthful growth. Can a larger Lilac shrub be moved with ease? Sure! Simply put, it requires a little more effort and “TLC” from beginning to end.
The greatest time to transplant lilacs is in the spring. In hot, dry conditions, they do not transplant well. Bushes should be transplanted after their blooming time and before the hot summer months.
It’s vital to remember that transplanting may have an impact on the following spring’s bloom. The bush will probably produce fewer blooms or none at all the next year. They concentrate on re-establishing their root system over the year following their transplant. The lilacs should blossom normally the next year.
How to Transplant Lilac Bushes
The fundamental steps for successfully transplanting lilac plants are as follows:
Lilacs require high, draining soil. When choosing the new location for your lilac bush, keep this in mind. If necessary, add a few inches to the soil’s elevation.
Make a decision regarding whether to cut the bush. Lilacs can have issues with this choice. We advise against trimming a lilac bush. Trimming plants allows the plant to concentrate on regrowing the root system, which goes against the logic of typical transplanting. However, pruning a lilac bush can mean cutting off the blossoms for the following year.
Dig far and deep to remove the plant from its present site. The transplant will be more successful and less traumatic if you have more roots.
In the new site, dig a hole. Create a hole that is roughly twice the size of the root system.
Put the lilac bush’s roots into the hole at the same depth they were at their previous position.
Water deeply and completely. When transplanting, we prefer to use a light solution of liquid fertilizer or seaweed fertilizer.
For three to four weeks, deeply water the soil every day to keep it moist but not soggy. Your roots will be helped to re-establish themselves as a result.
Is Korean lilac contagious?
This lilac cultivar, which is indigenous to China and Korea, reaches a height of around 48 feet and a width of at least 5 feet. Even though it has numerous stems and spreads widely, the plant is generally rounded. The stem is smooth and dark brown in color, as indicated earlier. Being a deciduous bush by nature, its tiny, dark green foliage sheds throughout the chilly winter months and becomes yellowish in the fall. The long-lasting, intensely fragrant, pinkish-lavender flowers are produced in a tall panicle inflorescence. They completely cover the plant during their peak flowering season, enhancing the beauty of the flower garden.
Which month is ideal for lilac planting?
Lilac trees grow best in the fall, just after the leaves have fallen and before the ground freezes. Lilacs can be planted in the spring before the buds open. However, springtime is a relatively brief season, therefore transplanting at this time is only advised in regions with really harsh winters.
When should lilacs be planted?
The ideal season for planting lilac plants is spring or fall. Make the hole deep and wide enough to fit the lilac’s roots, and then plant it with their spread vertically in the ground. Even if you intend to use them as privacy hedges, you should leave at least 5 feet (1.5 m) between each lilac bush you plant to avoid overpopulation.
A location with lots of afternoon sun and well-drained soil is ideal. Lilac bushes need adequate drainage, so wherever possible, planting lilac shrubs in somewhat higher locations is advised. Lilac bushes should be planted, then given plenty of water and a coating of loose mulch. Keep the mulch light enough not to hold too much moisture, yet thick enough to keep out weeds and preserve some moisture.
Do dwarf Korean lilacs grow quickly?
Wait till your tiny lilac bush has finished blooming before trimming it. After the plant has become fully established, an abundance of richly fragrant blooms start to bloom late in the spring.
Pruning lilac plants before winter is not advised because they flower on growth from the previous year. Instead, only prune in the springtime after the initial flowering has ended. This might encourage a second bloom.
Dwarf varieties of lilac, like Miss Kim (Syringa patula), Preston (Syringa x prestoniae), and dwarf Korean lilac (Syringa meyeri), can bloom sooner than conventional varieties, which can take up to five years.
It’s okay if you don’t want to prune your small Korean lilac bush. These plants are easy to shape-maintain and can just be left to blend in with the surroundings.
How frequently should lilac bushes be watered after planting?
Lilac shrubs need to be checked frequently after planting. Water once or twice a week, or whenever the top inch of the soil becomes dry. To make sure the plant is getting enough water, water slowly. It is advised to water often throughout the first year of growth.
Once the lilac has grown, it is better to only water it occasionally, once every 10 to 14 days. The plant can be drowned by too much water. Lilacs require dry soil to grow, so take care not to drown the bush. To tell if the plant needs watering, all you have to do is pay attention to the soil.
Keep the soil in the container your lilac plant is growing in moist. For the first month after planting, newly planted shrubs require watering 2-3 times per week. Once a week after the first month, give your plant a thorough watering. Water the soil to a depth of 12 inches, usually 2 inches per plant. Never overwater lilac plants.
A lilac bush can you overwater it?
Lilacs shouldn’t be overwatered because doing so could cause the plant to drown. Additionally, it’s crucial to avoid submerging the bush because it won’t survive in dry soil. Check the lilac shrub leaves and the soil to see if extra water is required. Watering is essential if the leaves are wilting or folding.
When may miniature lilacs be transplanted?
You have two options if you’re wondering when to transplant lilacs: spring or autumn. The majority of specialists advise taking action in spring. The best period is right after the plants blossom but before the summer heat really kicks in.
Are the roots of miniature lilacs deep?
Lilac shrub roots are quite rare to penetrate the side of a foundation. Lilac roots typically become damaged when they get too close to the soil-level foundation’s base. Lilac roots can only penetrate shallow foundations because of their shallow root systems. It is unlikely that you will sustain harm if your foundation is deep.
Lilacs can also cause foundation damage if the soil is thick and expands when wet and contracts significantly when dry. When there is a drought, the feeder roots draw a lot of moisture from the soil at the tips, which causes it to drastically shrink and can lead to cracks in the foundation. After a heavy rain, the soil fills once more, but the foundation still has fissures. Regardless of the distance between the foundation and the shrub, damage to foundations is unlikely in instances when the soil is light and the foundation is deep.
There is a slight possibility that lilac roots will obstruct water and sewer lines. Lilac roots choose the easiest route to sources of nutrients and water. They are more likely to enter leaking water and sewage lines than sound pipes, though. However, there is little chance of damage if your lilac shrub is located 8 to 10 feet (2-3 m) from water and sewer lines, even if the pipes are cracked.
Fungal diseases
This season, the Lilac Pseudocercospora leaf spot, a fungus, was detected in lilac samples examined by the Plant Disease Clinic. Symptoms are the same as reported (yellowing then browning leaves, dieback) (yellowing then browning leaves, dieback).
The PDC places a strong emphasis on sanitation because it appears that Pseudocercospora spores can survive on plant detritus for a number of years (leaves, stems, dead flowers, bark).
- To assist lessen the possibility of reinfection the next season, remove fallen leaves.
- Consistent watering and renewal cutting to reduce density will sustain the stressed plant.
Several of the plants in our landscapes, including lilacs, are afflicted by verticillium wilt. Verticillium dahliae and Verticillium albo-atrum are the two fungi that cause it. For a plant with this fungus infection, there is no cure.
- As a result of the fungi clogging the branch’s vascular system and preventing the transfer of water and nutrients, individual branches turn brown and die quickly.
- To increase plant longevity, increase watering and fertilization.
- The disease can spread across all sections of the afflicted plant, thus the best preventive is to buy resistant cultivars and practice proper hygiene.
Insects
The Lilac Borer, sometimes known as the Ash Borer, is a clearwing borer moth that creates tunnels in lilac stems.
- Frass, sap, and sawdust are warning signs (excrement).
- Some plants can withstand this harm.
- Others see branch dieback, and occasionally the entire plant dies.
- They won’t likely catch anyone’s attention.
Jeff Hahn, an extension entomologist, confirmed that no lilac borer samples have entered his lab this year.
Herbicide damage
Broadleaf weed treatments on lawns may volatilize, changing to a gas, and float onto unintended plants if sprayed during periods of extreme heat and humidity.
Herbicide damage signs like cupping and browning would appear in patterns:
- along a hedge’s one side but not the other,
- bushes positioned in or close to lawn areas, at the same level throughout their bases,
- and most critically, away from the area’s predominant winds.
Lilac hedges next to agricultural fields or other sizable herbicide-treated areas may experience damage in this manner.