The scent of lilacits, whose distinctive, sweet-smelling aroma welcomes us for a few weeks each year, is a sure indicator of spring. While we all enjoy these aromas and views, it is disheartening to notice that our lilacs have fewer blossoms and more scraggly branches each year. Many people are baffled as to why this is happening. These kinds of problems frequently have a pruning issue at their core.
Pruning is a task that, despite its importance, causes the most confusion. It can be difficult to know when and how to prune, but with a little understanding of how these spring-blooming beauties function, you’ll be able to prune successfully in no time.
It’s important to know that shrubs that bloom in the spring, like lilacs, generate flower buds for the following year on the old stems. Because of this, you must clip the lilacs as soon as possible after flowering, which takes around 2-3 weeks for proper pruning. After blossoming, 3–5 weeks later, the flower buds for the following year will appear. The right time must be chosen while pruning lilacs. You will shear off all of the flower buds and have no flowers the following year if you prune too late (in the summer, fall, or even early spring before flowering begins).
Shaping
Trim off any old, weak, or unproductive branches to help keep your lilac in good form. Dead wood or broken branches should also be taken out. To focus the plant’s vitality on the stronger, more fruitful branches, prune these branches closely to the ground. In order to keep your bush at a manageable height, you should also check up at the top and clip any branch tips (6-8 ft. is average).
Yearly Maintenance
Take a peek at the lilac’s base. Remove suckers that appear weak, but consider preserving a couple that appear stronger so they can eventually take the place of your main branches. Try to give your bush some room by removing any branches that are low to the ground or that are growing in the side. To improve airflow and ward off disease near the base of your shrub, trim away any branches that are overlapping or heavily crowding the area.
Take a look at the towering branches that have in the past borne flowers. Take out a few branches that are starting to look dated or weren’t strong bloomers this year. By doing so, you’ll help the branches that are performing well fill out and grow and offer your chosen suckers room to spread out over the coming years.
Rejuvenation Pruning
The lilac must have been badly neglected for a period of years, be quite old, and primarily composed of dead wood before undergoing this most severe trimming. These older lilac bushes need to be rejuvenated, which entails cutting the entire plant back to a height of around 20 cm above the ground. The plant will need a few years to recover, but once it does, you’ll get a brand-new plant in exchange for the few years you went without a bush or blooms. For a new and improved lilac experience, continue to shape and prune your lilac each year after rejuvenation pruning.
Do you need to remove wilted lilac blooms?
Your lilac bush will produce more blossoms the following year if you remove the dead flowers. When cutting off your flowers, it’s crucial to only remove the wasted blooms—don’t worry about any nearby stalks. Simply concentrate on the spent bloom’s stem if you can see the two fresh shoots that will grow into blooms the following year. Avoid cutting off the blossoms for the following year!
I now wish to stimulate a second flowering on my dwarf Bloomerang, which ought to happen in late summer or early fall. In order to produce more new growth and blooms during the second bloom season, the spent spring blossoms should be pruned off. A small amount of fertilizer made specifically for woody plants, which I could also use, will help encourage the shrub to bloom once more.
When should lilacs be deadheaded?
Lilacs should be deadheaded no later than 10 days after the flowers have faded, according to Cornell University Cooperative Extension, so that the shrub will focus its energy on developing new buds for the spring rather than seeds. In addition to depriving the shrub of energy, waiting too long to deadhead increases the likelihood that the new buds will be harmed or eliminated during the procedure.
Lilacs generate so many blooms that hand deadheading them might take too much time. The University of Minnesota Extension advises using a hedge trimmer to remove any wasted blossoms in that situation. Otherwise, you can also deadhead lilacs with pruning shears or strong scissors.
Cut back lilacs to the closest pair of leaves to deadhead them. Use your scissors or shears to cut the stem, then throw away the flower head. Although the Ohio State University Horticulture Extension cautions that deadheading Chinese lilacs (Syringa x chinensis) has only a minimal effect on their flowering and is normally too impractical to attempt even on younger bushes, deadheading generally improves the blooming of most lilac species. Chinese lilacs are occasionally grown in USDA plant hardiness zones 3 to 7, though they are less frequently cultivated than garden lilacs.
Should you prune a lilac tree’s dead flowers?
The removal of spent flowers to encourage new blooming—deadheading—is a crucial part of lilac maintenance. Lilacs should be deadheaded as soon as the flowering is finished to allow the plants to grow robust, healthy buds that will flower vivaciously the following year. According to the University of Minnesota Extension, you can use a hand pruner, but larger plants could require a hedge trimmer. Only the dead blossom should be removed; the plant should still have two leaves.
According to the Chicago Botanic Garden, you should prune lilacs at the same time as you deadhead them since they set the blossoms for the following year quickly after flowering. By doing this, you can prevent damaging or removing the developing buds. Three to four years after planting, you should start pruning lilacs. It might be necessary to trim back overgrown lilacs to just a few inches above the ground. Winter is the ideal time to complete this. In this instance, it will take the shrub one or two growing seasons to start blooming once more.
How should lilac bushes be pruned after flowering?
Cutting off the tops of stems that have grown out of control is frequently insufficient when pruning lilacs. It is typically preferable to remove the entire stem. The best way to trim lilacs is with clippers. To avoid spreading and promote later blooms, remove spent blossoms right down to the stems. Three-quarters of the branches should be pruned. Remove any shoots that are emerging from the main trunk and are growing close to the ground. Lilacs within the inner branches may need to be trimmed in order to increase air flow or let more light through.
However, it may be essential to prune the entire bush or tree to approximately 6 or 8 inches (15-20 cm) above the ground if lilac shrubs are already too big or starting to look unpleasant. Remember that it takes around three years for flowers to grow after the entire bush has been removed, so you might have to wait.
Do lilac bushes have multiple blooms?
Compared to other lilac trees, bloomerang lilac trees are more compact, reaching a short height of 4-6 feet tall and a spread of 4-6 feet, giving them a pleasing, rounded appearance. Their long, arched branches bear their veined leaves, which are bright green for the majority of the year until turning yellow in the fall.
The characteristic 4-petaled, 4-6 inch deep lilac-purple blooms on bloomerang lilac trees appear starting in May, cease blooming in June, and then return in July through the first frost of the year.
Specifications
With tall, arched branches, a compact and rounded shape, and rich green foliage that turn golden in the fall. Four spread petals, 4-6 inch, lilac-purple flowers that bloom in the spring and later in the summer.
What is the lifespan of lilac flowers?
Here are seven interesting facts about these beloved garden plants to honor the lilac bushes that are currently putting on a magnificent, fragrant display.
Kate Chopin described how Sister Agathe would frequently turn to the window during the day when the aroma of lilac blossoms started to fill the air, wearing the joyful, beatific expression that simple, pure souls wear as they wait for the arrival of people they love.
We could not have put it more succinctly. Here are seven things to know about cultivating and caring for these beloved garden plants, in honor of the lilac bushes that are putting on their magnificent, fragrant display at this time of year.
| Climate for Lilacs
While some lilac types may survive warmer environments, most prefer chilly weather (zones 37). They require a period of hibernation before they can bloom, which cold winters cause. Lilac plants typically bloom in the spring and only for two weeks, though the exact timing depends on the kind and location.
| Sun, Soil and Fertilizer
P. Allen Smith, a landscape and garden designer from Arkansas, lists lilac bushes among his top 15 favorite scented plants for the yard. He said to Flower, “Plants should be treated with a general fertilizer in early spring and then again after the bloom cycle. Lilacs bloom best when planted in full sun and well-drained, alkaline soil. For your early spring feeding, switch the general fertilizer out for super phosphate or another fertilizer heavy in phosphorus to promote blooms.
Mara Tyler of the Farm at Oxford in Pennsylvania, a grower of flowers, also provided her lilac-growing advice, beginning with full sun. Don’t overfeed the lilac, she advised, but we do give it a dose of compost and an organic local fertilizer in the ratio of 3-5-4 every year. We want to encourage blossoms rather than foliage growth because we want our lilacs to produce blooms. Additionally, it may take 34 years after planting tiny lilac pups before we can actually harvest from a bush. The first few years they grow more slowly, but around year 45 it seems like their growth really takes off.
The best time of year to plant lilac bushes, according to Tyler, is: “Whenever we have the time, we plant in the spring or the fall. Care, however, is influenced by the time you plant.” As with any plant, if you plant in the spring, be careful to water it regularly throughout the summer’s heat. The plants typically settle in well in the fall thanks to drainage from winter showers or snowfall.
| Pruning Lilacs
After they finish blooming, lilac bushes should be pruned and shaped since they produce buds on old wood. You run the danger of removing the blossoms for the following year, Tyler warned.
| Varieties of Lilac Bushes
While there are countless lilac types to choose from, here are a few to take into account if you have certain needs.
- Plant “Miss Kim” or “Blue Skies” in zones 8 or other warmer areas.
- Consider “Excel,” which puts on its major display between February and March, or possibly “Charles Joly” when thinking of early bloomers.
- recurring blooms: Select “Josee.”
| European Descent
North America does not have any native lilac bushes. Eastern European mountains in Bulgaria, Croatia, Slovakia, the Czech Republic, Hungary, and Romania are where the Common Lilac first appeared. The species was raised by the Turks for many years. Lilac plants eventually made their way to Vienna and Paris in the 1500s. Since they created so many different types, the common lilac is frequently referred to as a French hybrid or just a French lilac. Lilac bushes now adorn the gardens of George Washington and Thomas Jefferson after these European species finally made the voyage to the New World.
If you cut flowers from your lilac bushes for an arrangement, you may keep the flowers fresher longer by misting the petals, which can absorb water, and changing the water in the vases every day.
| A Whole Island of Lilacs
On Mackinac Island in Michigan, there are two additional species in addition to more than 100 types of common lilacs ” (pronounced “Mackinaw). The best growing conditions are cold winters and sunny, warm summers with enough precipitation. And the island’s well-drained soil, which has a limestone rock basis, is perfect for lilacs.
The oldest lilac bushes on Mackinac date back to the 1870s and can reach heights of 20 feet and a diameter of 27 inches “Lavander trees Since 1949, the town has celebrated the beginning of the June flowering season with a 10-day Lilac Festival. Even the Lilac Festival Queen and the Grand Parade are present. Plan to travel around this small town by foot, a bicycle, or a horse. In 1898, vehicles were outlawed.
Bonus | A Book of Lilacs
What better way to mark the passing of the seasons than with the flower that seems to herald the arrival of summer? For many years, lilacs have been a favorite flower and a source of creativity for painters like Claude Monet and Vincent van Gogh. In the eighth volume of the Gibbs Smith flower series, Lilacs: Beautiful Varieties for Home and Garden (Gibbs Smith, April 2022), Naomi Slade provides straightforward gardening advice to show that anyone can cultivate these vivid blooms. Beautiful images by Georgianna Lane also provide a ton of visual inspiration.
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.
What are lilac flowers used for?
The simplest method to enjoy lilacs is to use the blossoms to make an infusion for lilac sugar. The sugar can then be used in recipes to give baked goods a lilac flavor.
This also functions with purple simple syrup, which is really the same thing in liquid form and is ideal for mixing drinks. However, I believe that lilac-infused honey sounds the nicest.