When To Plant Lilacs In Michigan

We wish to grow a lilac hedgerow. How soon can they be planted in central Michigan?

When varies on the stage of growth of the plants you eventually purchase. If the plants are dormant, they can be safely planted as soon as you can get them into the ground, whether they are potted or bare root.

Because to the mild winter, the ground did not freeze solid, which may indicate an early planting season for dormant stock.

Because of Michigan’s diverse range of soil types and the different levels of cold and wetness that can be found in any particular location, the word “probably” is used. Sandier soil, for instance, will defrost and dry out more quickly than soil that is dense with clay particles.

Additionally, I believe the Gaylord region’s soils froze this winter more deeply than those in Lapeer did.

It is a given that you should avoid working the soil when it is wet, whether from precipitation, snowmelt, or frost, whether you are planting lilacs, amending the soil, or doing anything else. This is due to the physical structure of soil being damaged by digging or tilling moist soil, which causes it to become clumpy, difficult to work, and unfriendly to plant roots.

Here is a simple test: take a handful of soil, form it into a fist, keep it there for a few seconds, and then let go. It’s okay to continue working if the ball breaks. Wait until it dries more if it forms a ball; in the spring, this process can take a week or more.

Since a dormant plant is not actively developing, the relatively chilly soil and air temperatures we’ll likely have through early May won’t harm it. Usually, if an order is placed over the mail, dormant plants are sold bare root or potted in a soil-filled container.

Soon, non-nursery shops including home centers and supermarkets with garden departments will stock leafed-out nursery stock. Now is far too early to plant trees and bushes with leaves. I would hold off till the middle of May.

A strong cold, which we are very certain to experience well into mid-May, will most likely damage the foliage of a shrub planted now or well into April.

The supply for so-called “box stores” that sell leafed-out shrubs and trees is probably supplied by a grower in the south. A southern farmer is perfectly capable of producing quality crops; but, the stock is too delicate to be planted in Michigan much earlier than early May.

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.

Can I now grow a lilac bush?

I had a variety of roles as a founding worker at Gardener’s Supply over the years. I currently run my own business, which is called Johnnie Brook Creative. A huge vegetable garden, a seasonal greenhouse, a cutting garden, perennial gardens, a rock garden, a shade garden, berry plantings, numerous container plants, and a meadow garden are among the gardens surrounding my Richmond, Vermont, home. The garden is the only place I would rather be. Check out this Garden Gate magazine video interview from January 2021 if you’re interested in learning more.

Among all shrubs, lilacs are among the easiest to maintain. Their requirements are straightforward: lots of sunlight, excellent drainage, nutritious soil, and yearly pruning. The only maintenance you’ll need to perform is yearly trimming to preserve a great shape, so pick your planting location wisely. You’ll be rewarded with bouquets of scented blooms in the spring.

Lilacs can be planted either in the fall before the ground freezes or in the spring after the earth has thawed. Lilacs are frequently supplied bare-root and dormant in the spring. The plants are merely “sleeping,” not dead. When the roots arrive, take off any packing and soak them in lukewarm water for 10 to 15 minutes. Read How to Plant a Bare-Root Tree or Shrub for planting guidelines. Lilacs are also available in containers. Read How to Plant a Tree or Shrub for details on planting procedures.

In Michigan, what month are lilacs in bloom?

In northern Michigan, the sweet, aromatic perfume of blooming lilac bushes filling the air is one of the obvious indications of spring. The stunning purple blossom that grows on these hardy bushes is widespread in this area. Each year, Mackinac Island even holds a lilac festival. When should I plant my lilacs? is a popular query as late April approaches.

Since this hardy, low-maintenance shrub flourishes in northern states due to the colder summers, lilacs are highly popular among local green thumbs. When put to your garden, the potently perfumed blossoms will bloom normally in late May and will draw pollinators like hummingbirds and butterflies. Although there are many other types of lilacs, the common lilac (Syringa vulgaris) grows to a height of 12 to 15 feet and a width of 10 to 12 feet. The blossoms of lilac bushes make great cut flowers for interior arrangements and can linger for decades in your garden. The cut blooms will keep their perfume for three to five days in a vase filled with fresh water, allowing you to fill your house with the scent of spring.

What time should I plant them then? Well, that depends in part on the plant’s stage of dormancy when you buy it and how cold the winter was. You only need to be able to get into the ground without difficulty when buying a dormant plant (one with no leaves showing), whether it is potted or just bare roots. You might need to wait until the end of April to plant when we experience a particularly chilly winter. You may plant in early April if the winter was mild since the ground would warm out earlier.

In all scenarios, you should “test your soil first. Lilacs should not be planted, tilled, or otherwise manipulated in moist soil. This might be the result of recent precipitation, thawing snow, or even the melting of morning frost. Digging in moist soil destroys its physical composition, making it clumpy and unfriendly to roots. Make a fist out of a handful of dirt and roll it into a ball. If the dirt crumbles when you let go, it is sufficiently dry and suitable for labor; It is wise to plant the lilacs. If it continues to ball up, the soil is still too wet, and you should wait until it has further dried out before planting. Remember that a dormant plant won’t be harmed by freezing temperatures, so you can plant as soon as the soil is workable. You should wait until there is zero possibility of a hard freeze before buying an actively growing plant (one that has leaves growing) from your neighborhood nursery. For actively growing lilacs, it’s normally better to wait until mid-May to plant because a harsh winter will damage the foliage.

You should pick a location with well-drained soil that receives at least six hours of direct sunlight per day. The development of a powdery mildew can also be avoided in an area with sufficient air circulation. It is recommended to avoid planting on grassy areas. Regular fertilizer and watering are typical for lawns. Since they dislike being overwatered, lilacs should not be fertilized with nitrogen. Once the root system has taken hold, water once a week in dry weather and more frequently in extremely hot weather.

Which is better for lilacs: the sun or the shade?

Full light and well-drained soil are ideal for lilac growth. Lilacs won’t flower well if they are cultivated in partial sunlight or shade. The bushes can live for hundreds of years after they have established themselves in a new location, even if it may take them three to four years to do so. The plant’s growth may be impacted by the soil pH (alkalinity or acidity of the soil). A slightly acidic to alkaline soil is ideal for lilac growth. Because of their frequent high acidity, New England soils may need to be modified for the greatest lilac growth.

Pruning the blooming stem back to a set of leaves each year will stop seed formation and ensure that there will be an abundance of flowers. Good flowering years may be followed by terrible years if this is not done. Winter trimming will get rid of flower buds since they are generated in the summer before they blossom.

Branch out any diseased, damaged, or dead wood. Renewing pruning is necessary for tall, lanky, and poorly flowering plants; for three years, cut around one-third of the oldest stems at ground level each year. This promotes the development of strong new stems from the base. The plant should have fully recovered after three years, with flowers growing back to nose height.

Despite how resilient lilacs are, they nevertheless require plenty of water as they grow. Lilacs prefer soil that is both moist and well-draining.

Powdery mildew fungus (Microsphaera alni), lilac borer (Podosesia syringae), and scale are the most problematic lilac issues in our region (oyster-shell scale, Lepidosaphes ulmi and prunicola scale, Pseudaulacaspis prunicola). The leaves appear to have pale streaks of powdery mildew on them. Even though it is ugly, it is rarely severe in our environment. In stems and larger branches, often one to two feet above ground level, borers leave 1/8-inch holes. A modest infestation may be disregarded, but more than a few borers require professional diagnosis and treatment. While prunicola scale covers bark with a dusty white mass, oyster-shell scale is appropriately named since the pests resemble 1/8-inch oyster shells on the stems. Control adult scale by chopping off branches that are extensively infested; control microscopic baby “crawlers” with a strong hose spray of water (use a hand lens to see scale). Summer oil and dormant oil both work well.

Where should a lilac bush be planted?

The ideal season for planting lilac bushes 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.

How long do lilac bushes take to grow?

Lilacs produce flower buds for the following year after blossoming in the current year, just like other spring blooming plants do. Lilacs should be deadheaded as soon as they finish blooming to promote healthy bud growth for spring flowering.

Deadhead: For larger plants, use a hedge trimmer or a hand pruner to remove dead flower heads down to a pair of leaves. Shear gently, just removing the dried flower heads.
Renewal pruning: Renewal pruning promotes the growth and flowering of new stems while distributing more light throughout an older plant. Lilacs that have just been planted often don’t require trimming for 2 to 3 years, and it might take up to 2 years for a lilac to blossom. Lilac stems have a tendency to shadow out new growth at the base of the plant as they enlarge and become more like trees over time.
Remove a third of the base of the thickest stems with a lopper or handsaw.
Repeat this each year until all huge stems have been cut off.
For smaller, thickly branching lilacs like Korean or Meyer lilacs (Syringa meyeri) that have overgrown, rejuvenation pruning is a strategy.
Use a saw or hedge trimmer to chop the entire plant to the ground in the late winter.
In the spring, fresh growth will emerge from the root zone.
For one or two years, the plant might not bloom at all or only sporadically.
Make sure to choose cultivars that are disease-resistant because powdery mildew is simply aesthetic.

Fungal diseases

This season, the Lilac Pseudocercospora leaf spot, a fungus, was detected in lilac samples examined by the Plant Disease Clinic. The same symptoms have been recorded (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.

Signs include sawdust, sap and frass (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.

How deep should lilac bushes be planted?

Did you know that the National Gardening Bureau has designated 2022 as the “Year of the Lilac”? They have a sweet, eerie aroma and are among the easiest shrubs for your landscaping to maintain that bloom in the spring. Find out how to plant, nurture, and prune your lilacs.

About Lilacs

Syringa vulgaris, or common lilac, is prized for its tenacity, dependability, and scent. Lilacs are so hardy that they can live for more than 100 years and frequently outlive the houses they were planted near.

This tiny, multi-stemmed deciduous shrub (or tree) has approximately ten canes and blooms at eye level. The height of a common lilac can range from 8 to 12 feet, depending on the cultivar. The aromatic flowers attract butterflies and make good cuttings.

There are lilac types that come in white, cream, and even pink and yellow, though the blooms are typically lilac/purple in hue (ranging from very pale to extremely dark). Flowers can be solitary or double in number.

Lilacs bloom in northern states from mid- to late spring for around two weeks. However, there are lilac varieties for early, mid, and late seasons that, when cultivated together, guarantee a consistent bloom for at least six weeks.

Lilacs do best in soil that is fertile, humus-rich, well-drained, and neutral to alkaline (at a pH near 7.0). Add compost to your soil to improve it if it is in bad condition. (Learn more about adding amendments to the soil and getting it ready for planting.) Lilacs don’t enjoy having their feet wet and won’t blossom if they are kept too moist, so make sure the planting area drains well.

Lilacs should be planted in full sun, which is defined as having at least six hours of sunlight each day, for the finest blooms.

How to Plant Lilacs

If you’re fortunate, a friend may offer you a sucker, or offshoot, of the plant’s root system. The sucker will first appear pitiful, but all you need to do is dig a hole, fill it with soil, and then insert the sucker. water next, and then wait. You’ll be rewarded with enormous, fragrant blossoms in 4 or 5 years.
Lilacs purchased from nurseries can also be planted easily. If the plant was cultivated in a container, spread its roots out as you plant it; if it was balled or burlapped, gently remove the covering and any rope before doing so. Set the plant 2 to 3 inches deeper than it was while it was growing in the nursery and cover the roots with topsoil. in water Then add more topsoil to the hole to finish it.
Depending on the kind, place multiple lilac bushes 5 to 15 feet apart.
Apply a layer of compost under the plant each spring, followed by a layer of mulch to keep moisture in and weeds under control.
If the weekly rainfall is less than 1 inch, water during the summer.
If lilacs receive too much fertilizer, they won’t bloom. In the late winter, they can manage a few 10-10-10, but no more.
Spread some lime and thoroughly composted manure around the base of your lilac bush once it has finished blooming. Remove suckers while you form the shrub by trimming it.

Pruning Lilacs

Since lilacs blossom on old wood, it’s important to prune in the spring immediately following their bloom. You risk removing the wood if you prune later in the summer. A word of advice: It’s time to prune if your lilac flower clusters are getting smaller!
After bloom each year, cut away any dead wood. Remove the oldest canes by pruning (down to the ground). Take out the tiny suckers. Reduce weak branches until a robust shoot remains. Reduce tall canes to eye level.
Remove one-third of the oldest canes (down to the ground) in year one, half of the remaining old wood in year two, and the remainder in year three if your lilac is very old and in poor condition. Cutting the entire plant back to a height of approximately 6 or 8 inches is another option for elderly lilacs. Although it sounds dramatic, lilacs are remarkably resilient. This option’s drawback is that it takes some time for the hair to grow back. The lilac will grow back bursting with blooms, so there will be less work and more reward.
It is important to understand that extreme trimming causes bloom loss for one to three years. For these reasons, a smart pruning program gives the bushes yearly attention in an effort to avoid making dramatic and severe cuts.

The Syringa vulgaris kind of lilacs is the most widely grown and fragrant:

Try the double magneta variety “Charles Joly” for an early bloom.
Lilacs in the middle of the season include “Monge,” a deep reddish purple, and “Firmament,” a delicate blue.
Miss Canada, a reddish pink, and Donald Wyman, a solitary purple, are two late-season beauties.

Syringa x hyacinthiflora, an early-flowering lilac cultivar, opens 7 to 19 days before those of the common lilac. Hummingbirds and butterflies are attracted to its fragrant blossoms.

The cutleaf lilac, a fragrant pale lavender, is one of the common lilacs that may flourish as far south as Zone 9. Common lilacs appreciate cold weather. The beautiful shrub Syringa patula ‘Miss Kim’ has light lilac-blue flowers that eventually become white.

There are tiny kinds for gardeners who simply don’t have the space for the conventional larger lilacs, particularly those in urban settings. Even in a container on your balcony or patio, they will grow.

‘Baby Kim’ has a lovely rounded shape, only grows 2 to 3 feet high (and 3 feet wide), and has purple flowers that draw butterflies. Hardiness from Zones 3 to 8 extended.
Compact lilac ‘Little Lady’ (Syringa x) has dark pink buds that open to lilac-pink flowers and grows to be 4 to 5 feet tall and wide at maturity. Zones 2 to 7 are tough.
Syringa vulgaris cultivars “New Age Lavender” and “New Age White” were developed for mildew resistance and are quite compact, growing from 4 to 5 feet tall and wide. Hummingbirds and butterflies are drawn to their fragrant blossoms. Zone 4 hardy.