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.
Where should a lilac bush be planted?
When the lilacs begin to blossom, it is a solid indicator that spring has arrived for good. While many people only have a limited knowledge of common lilac (also known as French lilac) shrubs that can reach a height of 15 feet or more, there are now a lot more options available than there were fifty years ago. Some varieties that rebloom enhance the garden’s appeal the entire growing season.
How to Choose Lilacs
The common lilac is what you will most likely find when you go plant shopping. This traditional plant comes in a variety of cultivars and variations, each of which yields fragrant spring flowers in pink, purple, white, or even combinations of those hues. Common lilacs are typically the most fragrant variety of lilac and can grow to be rangy and large.
Rebloomers have arrived in the garden center thanks to recent introductions of hybrids between the common lilac and other shrub-type lilacs. Some of these more recent types are a little less fragrant, but they also tend to be smaller, bloom more frequently throughout the growing season, and have fewer powdery mildew issues.
The tree lilac is another common variety of lilac. It can grow to a height of around 20 feet and blooms with cream-colored flowers in the middle of the summer. Though it doesn’t require much trimming, keep in mind that the tree lilac is a tree, not a shrub.
Where to Plant Lilacs
Lilacs should be planted in full light (at least 6 to 8 hours per day), as too much shadow will prevent them from blooming. Lilacs also prefer moist, well-drained soil that is slightly alkaline.
When to Plant Lilacs
Before the ground freezes in the late fall is the ideal time to plant lilacs. After the earth thaws in the early spring, that is the next ideal period to plant. Lilacs will likely need to be planted as soon as you can locate them at the garden center, which is great; if you choose to do so during a warmer season, they might require additional watering.
How to Prepare the Soil for Planting Lilacs
A soil test should be performed prior to planting since lilacs thrive in slightly alkaline (6.5 to 7.0 pH), moist, well-drained soil that is high in organic matter. Lime must be added to raise the pH if it is below 5.5. It’s time to get the soil ready when you’ve obtained the ideal pH. Improve individual planting holes by mixing Miracle-Gro Garden Soil for Trees & Shrubs in a 50:50 ratio with the natural soil to give lilacs a nutrient-rich start. Iron and phosphorus are also present in this garden soil to promote root development and ward off leaf fading.
How quickly do lilac trees expand?
Syringa vulgaris, sometimes known as common lilac, is a deciduous shrub with springtime blooms. Along with other decorative plants like ash trees, forsythia shrubs, and privet hedges, they belong to the olive family. The pleasant scents of their blossoms are a standout feature of many lilac types. The blooms occur in panicles or branching clusters. Only a third of an inch is the size of each blossom. The leaves are 2 to 5 inches long and range in color from gray-green to blue-green; they do not change color in the fall. This shrub’s bark is gray to grayish brown. Before the ground freezes in the early fall is the ideal time to grow lilac bushes. They grow between one and two feet each year at a moderate rate.
Are lilacs challenging to maintain?
Lilac bushes require little general maintenance because they are low-maintenance shrubs, with the exception of periodic trimming.
Lilacs may withstand a variety of soil types, although they prefer humus-rich, well-drained soil. In order to make a good planting soil for them, incorporate compost into the soil. Lilacs prefer to have their roots kept dry, therefore they should be irrigated properly but sparingly.
It is not required to fertilize lilac trees frequently. However, if there isn’t too much nitrogen present, which would cause insufficient flowering, fertilizing in the early spring may assist promote flowers.
Lilac plants are typically hardy, but occasionally they are plagued by insect pests like borers. Watch for any indications of a pest problem and take fast action to treat it. Sometimes treating insects with a soapy water spray will be adequate. For the care and health of lilac trees, however, it can be essential to completely prune the plant if there are severe infestations.
Pruning is crucial for lilac maintenance. Lilac plants should be well-pruned to reduce the risk of diseases like powdery mildew.
Lilac trees should be planted when?
When it comes to planting Spring-blooming lilacs, you have two choices. A lilac bush can be planted early in the spring or in the fall, before the first frost date for your region.
Regarding what you plant, you have two basic choices, and these choices will produce results the quickest.
You have two options for planting lilacs: either bare root or a container variety that may be found at your neighborhood garden center or online from a company like Nature Hills Nursery. Lilac roots that have been de-soiling and sold “bare root” do not come in pots.
Who has the best?
I prefer to plant lilac pots that have been rooted and developing for at least three years. When they are in stock, I can get mine from my local garden center or online at Nature Hills Nursery.
If you plan to cultivate lilacs, you should be aware that the bushes don’t begin to bloom until they are a few years old. And yes, lilacs do grow on shrubs, often known as bushes, that are many feet wide and several feet tall.
For the shrub to become established, form a solid root system, and sprout buds that blossom in the spring, at least three years are required.
I advise choosing a container lilac that is already a few years old if you don’t want to wait a few years to see lilac flowers in your garden because it will probably bloom the same year you buy it or the year after.
(Always inquire about it with your garden nursery first. The size of the plant’s container ought to be able to tell you how old the plant is.)
A benefit of bareroots is that they are less expensive than lilac containers, especially if you are having them shipped.
They are only delivered while they are dormant, and they are shipped without any soil covering the roots.
I discover that lilac containers are more accessible than bare roots, especially at neighborhood shops.
Lilacs: Lilac Varieties and Why it Matters
You can choose from hundreds of different lilac kinds, but you won’t find anything but the most common ones at garden centers.
The Syringa Vulgaris “Common Lilac hybrid, which is also the most fragrant, produces some of the most adored lilacs.
In fact, if you enjoy lilacs, you may already be familiar with them by name: Miss Kim, Common Purple Lilac, and a long number of other names.
But lilac types differ from one another in more ways than just appearance. For those of us who reside in the Southern region of the United States, it is fortunate that some types have been designed to grow in warmer climes.
You see, lilacs enjoy the cold. For them to produce the blossoms they are famed for, a very lengthy stretch of cold Winter weather is actually required.
Lilacs actually thrive in such unforgiving conditions, whereas many other plants can’t. The plant is so well-liked in cooler regions because of this.
In order to choose the right plant for your garden, you should consider your hardiness zone like you would with any other plant.
For instance, if you live in Zone 8, you should choose a low-chill lilac variety. Lilacs that have been bred to thrive in climates with milder winters are known as low-chill variants.
What distinguishes a lilac bush from a lilac tree?
Lilac bushes (also known as shrubs) are characterized by their numerous woody stems that emerge from the plant’s base. In contrast, the trunk of the majority of lilac trees is the only woody stem. However, your neighborhood garden center might also sell shrub lilacs that have been grafted onto a single stem to give them the appearance of miniature trees.
The choice between a lilac tree and a lilac bush is typically determined by the amount of space available. Lilac bushes come in a range of sizes and can be placed in more compact areas of a garden. A lilac tree requires space to reach heights of 20 feet and widths of 15 feet. Both require sunlight to bloom well.