Can I plant lilac next to House
David Craig
Updated on April 14, 2026
Lilac roots aren’t considered invasive and as long as you leave enough space between the tree, or shrub, and the structure, there is little risk from planting lilacs near foundations. Lilac roots generally spread one and one-half times the width of the shrub. A distance of 12 feet (4 m.)
Are lilacs good foundation plants?
Their size makes lilacs inappropriate for foundation plantings, locations against walls and fences, and places where they will eventually shade or encroach upon established parts of the garden.
How much space does a lilac bush need?
Here’s the first rule of planting: lilacs need lots of space to grow. If you’re planting a hedge, they’ll need a spot at least seven to eight feet wide and ten feet wide for a shrub. They also need at least six hours of sun a day to have excellent flowering. Provide a well-drained, alkaline soil.
Where should you not plant lilac bushes?
Lilacs grow best in full sun, so avoid planting them where they will be shaded for more than half a day. Be sure to plant them with enough space for future growth. Read the plant label to get the height and spread of the mature plant. To thrive, lilacs need good drainage.How deep are lilac roots?
You can generally expect shrubs and trees to develop roots that extend out about one and one-half times the length of the branches. Lilac roots are not considered invasive, but a shrub that’s 10′ wide will probably have roots extending out about 15′ in all directions.
When should lilacs be planted?
The best time to plant lilacs is in late fall before the ground freezes. The next best time to plant is in early spring after the ground thaws.
How do you keep a lilac bush from spreading?
Prune the roots in a circle, using deep plunges of a sharp shovel, and then treat the suckers outside the circle with an herbicide such as Roundup®. Avoid spraying herbicide on any suckers still connected to the parent plant.
What should I plant next to my lilac bush?
You’ll find many attractive spring bulbs to fill up the area near your lilac bush as lilac companion plants. Bulb plants like daffodils, tulips, grape hyacinth and peonies multiply and naturalize. Plant enough of them and you’ll never weed in the area again.Do lilac bushes spread?
Lilac bushes will typically flower without any effort from you. However, if left to grow and spread on their own, common lilacs will eventually only flower on the tops of the uppermost branches.
Are lilacs good for privacy?Lilac hedges, with their colorful, often fragrant blooms, provide privacy and beautify the landscape. Plant them as a screen, barrier, property line marker or garden room divider or backdrop.
Article first time published onHow fast do lilac bushes grow?
The lilac is a deciduous, multi-stemmed shrub with an irregular, rounded outline. It is fast growing when young, but slows to about one foot a year with age.
What is the lifespan of a lilac bush?
Many factors influence how long California lilacs will live. When these plants get proper pruning to remove older shoots, they can often survive for closer to 15 years. Without adequate pruning, California lilacs may live for around 10 years.
Can lilac tree roots damage Foundation?
Potential Damage from Lilac Roots It’s very unlikely that lilac bush roots will break through the side of a foundation. Damage usually occurs when lilac roots approach the base of the foundation under the soil. Since lilac root systems are shallow, they can only reach the base of shallow foundations.
Do lilac roots grow down or out?
Lilac shrubs reproduce by seeds, but they also grow new plants from suckers. Shoots grow from the roots parallel with the surface of the soil. As they go along, they send up sucker shoots. … The big problem with getting rid of lilac bushes is that the plant regrows from any piece of root section left in the ground.
What is the difference between a lilac bush and a lilac tree?
To clear up any confusion, there is no difference between a lilac bush and a lilac tree, they are the same plant just called by different names. … Some lilacs flower two weeks earlier, including Syringa x hyacinthiflora varieties and these are often referred to as early flowering lilacs.
What do lilacs attract?
The heavily-scented purple flowers on the common lilac (Syringa vulgaris) bloom in late May and attract hummingbirds, butterflies, and other pollinators. The cut flowers are perfect to bring the scent of spring right into your home.
Can lilacs be grown in pots?
Growing a lilac bush in a pot is a possibility. When selecting a lilac variety for a decorative pot, look for a dwarf variety such as our Bloomerang® Dwarf Purple Lilac. … Ideal placement for potted lilacs can be balconies, rooftop patios, decks, and very small garden or landscape areas.
Can you plant lilacs in the summer?
Make sure the site drains well. Lilacs don’t like wet feet and will not bloom with too much water. Plant in either spring or fall, although the latter is preferred. If you’re lucky, a friend will give you a sucker, or offshoot, of the root system of one of their plants.
Do lilacs send out runners?
Because some lilac bushes sends out suckers (or shoots) through their roots, they are easy to propagate! In fact, if your neighbors have an old lilac, they’ll thank you to remove suckers the plant insists on sending up every year! All you have to do is dig up these shoots with a portion of their root system intact.
When can you cut back lilac bushes?
When To Prune As a general rule for all lilacs, they should be pruned immediately after they’re done flowering in the spring. Since lilacs set next year’s flower buds right after the current year’s flowers have faded, pruning later in the summer or fall will result in cutting off many or all of next year’s flowers.
Do lilac runners bloom?
Yes, they will bloom, eventually 🙂 Lilacs commonly spread by suckers to form rather dense thickets if left to their own devices and starting new plants from root suckers is very common.
Which is the most fragrant lilac?
The lilac usually considered the most fragrant is a Chinese native—S. pubescens. It has small, white flowers tinged with purple.
What do lilacs symbolize?
Lilacs symbolize spring and renewal, but they had other meanings in different cultures. The Celtics saw lilacs as magical, and they symbolized old love in the Victorian age. … White lilacs represent purity and innocence, while purple lilacs symbolize spirituality. Magenta lilacs symbolize love and passion.
Are lilacs poisonous to dogs?
Lilacs do not contain any chemicals that will poison animals or humans, nor do they irritate the skin. Even though lilac stems, leaves, and flowers pose no health threat to dogs, it is a good idea to keep your dog from chewing on the plant.
What month do lilacs bloom?
Although many lilac varieties bloom in midspring, commonly around May, the “Excel” cultivar blooms as early as February or March. Combine this early-blooming lilac with other, later-blooming varieties to extend the flowering period from late winter through late spring, or two near-continuous flushes of blossoms.
How much does a lilac bush grow per year?
The best time to plant lilac bushes is in the early fall before the ground freezes. They have a moderate growth rate of 1 to 2 feet per year.
At what age do lilacs bloom?
Age: Lilac plants need time to grow before they begin flowering. So, if you have a very young plant, it may not be mature enough to bloom. Most plants start blooming after three or four years but some may take as long as six or seven. The blooms for the first few years will be sparse but should increase with time.
Are lilacs perennials?
It produces an abundance of beautiful lilac lavender flowers and blooms continuously from early spring through autumn. … With its flower power and extended bloom time, ‘Lilac Falls’ is one perennial growers, landscapers and gardeners will surely fall in love with.
How fast does a Miss Kim lilac grow?
This shrub will grow about 6 to 10 inches per year. At maturity, the Miss Kim lilac can reach a height of 4 to 5 feet.
Do lilacs multiply?
Propagating lilac bushes from cuttings is tricky, but definitely not impossible. Take cuttings of lilac bushes from tender new growth in late spring or early summer. Mature growth is less likely to root. Take several cuttings to increase your chance of success.
How many colors of lilacs are there?
“The flowers are typically purple to lilac, but some cultivars can be magenta, pink, or white,” she says. “Plant in full sun, so they will receive at least six to eight hours daily, and remember to prune after flowering.