Planting & Growing Lilac Bushes | Nature Hills

Huge, fragrant blooms in spring on an easy-care bush

There is nothing so welcome in springtime than a soft breeze rustling through a Lilac in bloom! The fresh floral fragrance of the big, broad, pointed clusters of tiny true flowers is simply unforgettable.

Give yourself these special shrubs and you'll make everyone in your neighborhood happy, too! You'll also provide lots of early-season nectar for butterflies!

Lilacs are excellent informal hedges and make lush privacy screens. Use them as a backdrop for borders or create an impressive standalone lawn planting in an island-style bed.

Read through this #ProPlantTips Lilac guide from NatureHills.com. It's easy to maximize the vigor and performance of your new Lilac bushes with a few tips of the trade.

Which Lilac cultivar should you choose?
Where should you plant your new Lilac bush?
How should you plant Lilac bushes?
What are the recommended care tips for Lilac (Syringa)?

Which Lilac cultivar should you choose?

NatureHills.com offers a compelling catalog of healthy, well-developed plants. It's no wonder that professional garden designers work with us every week to delight their clients.

Enjoy the incredibly fragrant, old-fashioned favorite Common Purple Lilac (Syringa vulgaris), just like the ones in Grandma's yard. Get a double dose of showy blooms with a modern selection, like hybrid Bloomerang® Dark Purple Lilac (Syringa x BLOOMERANG 'SMSJBP7').

We have Lilac varieties to suit the needs of any garden. Please read the descriptions and Plant Highlights on every product page.

Miss Kim Lilac (Syringa pubescens subsp. patula 'Miss Kim') is a compact choice with a refined shape
Late-blooming, dark purple Ludwig Spaeth Lilac (Syringa vulgaris 'Ludwig Spaeth') extends your season of that fabulous fragrance
Stylish tree-form selections like Tinkerbelle Lilac Tree (Syringa TINKERBELLE 'Bailbelle') make a great specimen
Pink-flowering James MacFarlane Lilac (Syringa x prestoniae 'James MacFarlane') is a late-blooming Canadian hybrid that easily withstands extreme cold and high winds
Gorgeous Sensation Lilac (Syringa vulgaris 'Sensation') adds pinstriped petals to your borders and indoor arrangements

Where should you plant your new Lilac bush?

Supply Lilacs with full sun (at least six hours of sunshine a day) to be treated to the most astonishing display of aromatic blooms. Look for a planting site in a sunny spot that has plenty of good air circulation to prevent powdery mildew.

Well-drained soil is important to keep them happy and healthy. Lilacs perform best when the soil surrounding their root systems drains relatively quickly after rainfall.

Plant them in raised beds if you have heavy, marshy soil. Many people choose to grow smaller-scale Lilac shrubs in extra-large, lightweight resin containers for the patio, deck, or balcony.

Are Lilac Roots Invasive? Can I Plant Them Near Sidewalks and Foundations?

Lilac roots remain fairly shallow and shouldn't become invasive or aggressive towards sidewalks or patios. Large-scale selections make wonderful anchors in your foundation planting at the corner of your home.

It is a good idea to plant them at least 10 feet away from your home. You will want easy access to the exterior of your home for repairs and painting.

How should you plant Lilac bushes?

Please be ready to track your NatureHills.com package to your doorstep. These shipping boxes are nice and sturdy, and you'll want to open them as soon as you can.

Give your new plant a nice, long drink before planting. Soak bareroot plants for a few hours or overnight; dunk potted plants in a bucket of water until the bubbles stop.
Dig a planting hole at least twice as wide as the root ball or container size.
Long-lived Lilacs can live hundreds of years! Add symbiotic Nature Hills Root Booster during planting for support that grows with your plant and doesn't wear out.
Place your Lilac in the soil and press the backfill soil around it. Soak your new Lilac well to eliminate air pockets and ensure good soil contact with the roots.
Add a three-inch layer of mulch over the root zone to protect your new landscape asset. Please pull the mulch back away from directly touching the stems.

Get more #ProPlantTips planting advice here

What are the recommended care tips for Lilac (Syringa)?

Watering Lilacs

Water new Lilacs carefully the first year in your garden to get their roots established, using the Finger Test. Poke your finger into the soil around your plant up to the second knuckle…water as it starts to grow dry.

Thereafter, water these rugged, durable shrubs during high heat and in drought conditions. Keep container-grown Lilacs watered regularly throughout their entire life.

Feeding Lilacs

Lilac plants appreciate rich soil. Every other year in early spring, put a top-dressing of compost at the base of the plant and water it in.

Fertilize with a high-quality, low-nitrogen formula designed for flowering shrubs. We recommend following the label instructions for application rate and timing.

Pruning Lilacs

Prune right after flowering is done to clean up your shrub. Of course, you can also prune the blooms for an impressive cut flower arrangement!

What's springtime without the traditional scent of Lilac gracing your interior tablescapes? Choose a deep vase that is weighted on the bottom to showcase the generous blooms without tipping.

Every few years, prune out a few of the thickest, oldest branches at ground level. This practice will keep your Lilac refreshed and looking its best.

Create memories with long-lived, easy-care Lilac bushes planted and grown at your home. They make very thoughtful housewarming gift plants, as well!

Happy Planting!

Frequently Asked Questions

Why isn't my lilac bush blooming?

Lilac bushes typically fail to bloom due to improper pruning timing, insufficient sunlight, or plant immaturity. Young lilacs need 3-4 years to establish before producing significant blooms, while mature plants require at least 6 hours of direct sunlight daily. Pruning at the wrong time removes next year's flower buds since lilacs bloom on old wood. Prune immediately after flowering ends in late spring, ensure full sun exposure, and be patient with newly planted specimens.

How and when should I prune my lilac bush?

Prune lilac bushes immediately after flowering ends in late spring to early summer, as they set next year's buds on new growth. Remove spent flower clusters first, then cut out dead, damaged, or crossing branches, and thin older canes at ground level to encourage new growth. Avoid fall or winter pruning, which removes flower buds and reduces next season's blooms. For overgrown bushes, rejuvenate by removing one-third of the oldest canes annually over three years.

What is the best time to plant lilac bushes?

The best time to plant lilac bushes is in early spring after the last frost date or in fall, 6-8 weeks before the ground freezes. Spring planting allows lilacs to establish their root systems during the growing season, while fall planting gives them a head start for the following year. In USDA zones 3-7 where most lilacs thrive, aim for March through May or September through October depending on your local climate. Choose a location with full sun (6+ hours daily) and well-draining soil for optimal bloom production.

How much sun do lilacs need?

Lilacs require full sun, meaning at least 6-8 hours of direct sunlight daily, to produce their most abundant and fragrant blooms. While they can tolerate partial shade, flowering will be significantly reduced in locations receiving less than 6 hours of sun. Plant your lilac in the sunniest spot available in your yard for maximum flower production and healthy growth.

What kind of soil do lilacs prefer?

Lilacs thrive in well-draining, slightly alkaline soil with a pH between 6.5-7.5, though they'll tolerate neutral conditions. They perform best in loamy soil that doesn't stay waterlogged, as wet conditions can lead to root rot and reduced flowering. Heavy clay soils should be amended with compost or coarse sand to improve drainage. Test your soil pH before planting and add lime if needed to achieve optimal alkalinity for maximum bloom production.

How do I fertilize lilac bushes?

Lilac bushes thrive with minimal fertilization and actually prefer slightly alkaline soil with a pH between 6.5-7.5. Apply a balanced 10-10-10 fertilizer in early spring before new growth begins, using about 1/4 cup per mature bush scattered around the drip line. Avoid high-nitrogen fertilizers which promote leafy growth at the expense of blooms. For best results, add compost annually and ensure good drainage rather than heavy feeding.

How do I transplant a lilac shrub?

Transplant lilacs during dormancy in early spring before bud break or in fall after leaf drop, when temperatures are cool and stress is minimized. Dig a root ball that's 12-18 inches wide for every inch of trunk diameter, keeping as many feeder roots intact as possible. Plant at the same depth as the original location in well-draining soil with full sun exposure. Water thoroughly after transplanting and maintain consistent moisture for the first growing season to establish the root system.

What causes suckers or shoots under the lilac bush?

Lilac suckers typically develop when the root system is disturbed by cultivation, mowing too close, or damage, triggering the plant's natural response to produce new shoots for survival. Grafted lilacs are particularly prone to suckering, as shoots may emerge from the rootstock below the graft union rather than the desired cultivar above. These suckers drain energy from the main plant and can overtake the original bush if left unchecked. Remove suckers promptly by cutting them at ground level or digging down to sever them at the root, and avoid disturbing the soil around the base unnecessarily.

How far apart should I space lilac bushes when planting?

Space lilac bushes 6-10 feet apart, depending on the mature size of your chosen variety. Compact cultivars like Miss Kim Lilac can be planted closer at 6 feet apart, while larger varieties like Common Purple Lilac need 8-10 feet between plants. This spacing allows for proper air circulation and prevents overcrowding as the bushes mature. Check your specific variety's mature width on the plant tag and space accordingly for best long-term results.

How do I deal with leggy or unproductive lilac branches?

Cut back leggy or unproductive lilac branches immediately after flowering in late spring to early summer, removing up to one-third of the oldest canes at ground level. Focus on branches that are more than 4-5 years old, weak, or growing toward the center of the bush. This rejuvenation pruning encourages vigorous new growth from the base and improves air circulation. Make clean cuts with sharp pruning shears to prevent disease and promote healthy regrowth for next season's blooms.