Lilac blooms and shares its fragrance right at the beginning of spring, which makes it one of the most beautiful flower shrubs.
Essential Lilac facts
Name – Syringa vulgaris
Family – Oleaceae
Type – shrub
Height – 6 ½ to 16 feet (2 to 5 meters)
Exposure – full sun, part sun
Soil – rich enough
Foliage – deciduous
Flowering – April to June
Follow our advice to grow a magnificent lilac bush.
Planting the lilac correctly is a sure way to get a nice shrub and beautiful blooming in spring.
Season for planting lilac
It is best to plant lilac in fall to speed root development up.
But like most shrubs purchased in containers, you can plant it all year long as long as you double down on watering if planting in spring or summer.
How to plant lilac correctly
Lilac is not so demanding as regards soil type, but if you want to increase blooming, follow our planting tips.
- Lilac appreciates sunbathed spots to bloom well.
- Rich, well drained soil will spur your lilac’s spread and flower renewal.
- Mix soil mix into your garden soil.
- Adding fertilizer such as manure and seaweed will help your lilac to take root and grow.
If you want to try and set up a lilac hedge, set each plant about 6 ½ feet (2 meters) apart, to be sure to let each lilac plant have enough growing space.
- For all your shrubs, follow our guidelines for planting shrubs.
Lilac cuttings are the best way to propagate your lilac.
Pruning and caring for lilac
Of course, the solution is often in the middle path, better to not prune the lilac too strictly but to reduce it slightly every year.
This is the best way to ensure that your lilac will bloom year after year, thanks to the pruning and to the few practices shared here.
How to trim lilac
- The best timing to prune lilac is just after the blooming, when the flowers have wilted away.
- Prune just a little off the branches that have just born flowers, after they have wilted off.
- To know how much you should cut off, pretend you’re collecting the branches to prepare a bouquet.
Caring for lilac
Once properly settled in, lilac only requires little care and flowers year after year, but a few good practices will help extend its magnificent blooming and make it truly stand out.
- Addition of flower shrub fertilizer is recommended at the end of winter. Bury a handful of fertilizer at the foot of the tree.
- Regular watering in case of high temperatures or prolonged dry spells is preferable.
Diseases & parasites that often attack lilac
Some fungus such as mildew or scale insects attack in summer.
- Downy mildew: techniques and organic treatments to avoid it
- Scale insects: techniques and organic treatments to avoid them
Lilac also falls victim to powdery mildew, usually at the end of summer when moisture joins in on the summer hear.
- Powdery mildew: techniques and organic treatments to avoid it
Finally, among the possible pests, moths are the most dangerous threat for lilac.
Learn more about lilac
It will enchant your gardens by blooming at the beginning of spring, will attract birds and of course the first honeybees of the season.
Lilac can grow to a height of 20 to 23 feet (6 to 7 meters), but generally is seen to stay around 10 to 13 feet (3 to 4 m) tall.
Its leaves are deciduous in all climates and regions, and are cute little light green jewels, soft and not leathery at all.
Its flowers are born in panicles which are called thryses, and spread a delicate fragrance. Their hue is quite distinct, and gave its name to the lilac color. Certain lilac varieties are double-flowered, but they are quite rare.
Lilac is often encountered in our homes, where cut stems form magnificent bouquets.
Lilac is one of the most-planted shrubs in our gardens, due to its fragrance and high ornamental value.
An entry gate to the city of Paris is named after this flower: Porte des Lilas.
Smart tip about lilac
To have beautiful flowers, in fall, spread a sac of soil mix blended to flower fertilizer at the base of the tree.
You can also pour the ashes from your fireplace all winter long nearby, it will increase the blooming in spring.
Read also on the topic of shrubs
- Ideas of flowered shrubs for a hedge
- Hedges, great barriers against diseases
- Shrubs that flower in the summer
Credits for images shared to Nature & Garden (all edits by Gaspard Lorthiois):
Pale violet lilac by Camille’s Print, own work
Deep violet lilac by Rosalyn & Gaspard Lorthiois, own work
Dried lilac seed pods by Rosalyn & Gaspard Lorthiois, own work
White lilac by Rosalyn & Gaspard Lorthiois, own work