How to Grow, Harvest, and Use Lilacs

Lilacs are one of the most loved plants for gardeners and herbalists alike. Their flowers — which can range from white to violet, blue, light purple, dark purple, and even a light yellow called Primrose — add a pop of color and charm to any garden or yard. Plus, the flowers also boast medicinal benefits that make them appealing for homesteaders and tea drinkers alike.

Whether you’re comfortable in the garden or a beginner, our guide will teach you everything you need to know about growing, harvesting, and using these fragrant flowers!

Lilacs are fragrant and versatile plants that are very easy to grow and harvest. Learn how to cultivate lilac bushes, identify their uses, and harvest lilac flowers for tea, syrup, and remedies. From growing tips to processing and storing flowers, we'll cover everything you need to know about these blossoms for your garden and home, and why they make a welcome addition to any at-home apothecary!

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This blog is provided by St. Fiacre's Farm LLC for informational purposes only. It does not constitute medical advice, and you should always seek the advice of a qualified healthcare provider for any medical questions or concerns. Please note that we may earn a small commission on any purchases you make through our affiliate links, at no additional cost to you. Thank you for your support!

What are Lilacs?

Lilacs are part of the Syringa genus, meaning they actually belong to the olive family! They’re known for their beautiful clusters of small flowers that bloom in a variety of shades. These hardy plants have been used for centuries.

Native to Eastern Europe and Asia, they like temperate climates best. And while these blooms are beautiful, they also offer several medicinal benefits and culinary uses, making them an excellent addition to any herb enthusiast’s garden.

Lilac Bush vs. Tree vs. Shrub: What’s the Difference?

When planning your lilac garden, it’s helpful to know the differences between a bush, tree, and shrub.

• Lilac bush: The most common form. Bushes grow as dense, multi-stemmed plants that are ideal for gardens of all sizes. This form also makes harvesting flowers easy. These are usually trimmed.

• Lilac tree: A single-stemmed variety or a bush that has been pruned into the shape of a tree. Larger species like the Japanese lilac tree can reach up to 25 feet tall! They’re excellent for shade or as a focal point in your yard.

• Lilac shrub: The more natural-looking variety, lilac shrubs are also multi-stemmed. They work well in cottage-style gardens. Shrubs are left in their natural state.

Remember, a lilac bush is easiest to harvest, so if you hope to reap the medicinal benefits of this plant, a bush is your best bet.

Medicinal Uses of Lilacs: Benefits and Considerations

Lilacs (Syringa vulgaris) have been traditionally used in herbal remedies for various health benefits.

While lilacs are known for their soothing properties, they may support:

• digestion
• skin health
• minor ailments like sunburn
• insect bites
• skin rashes

Rich in antioxidants, lilacs are believed to have anti-inflammatory, antiseptic, and calming effects, promoting relaxation and overall wellness. Additionally, lilacs have been used in traditional practices to support digestion by easing constipation, gas, and intestinal discomfort. Some also use lilac to boost immunity, aid with minor coughs, and even prevent lung infections. However, it is important to note that lilac should not be used in combination with medications that alter blood coagulation and should be avoided during pregnancy. Always consult with a healthcare provider before using lilac, especially if you have any medical conditions or are taking medications.

How to Grow Lilac

Growing lilacs is surprisingly straightforward if you follow a few key guidelines. With proper care, they can thrive for decades! 

They’re best planted in early spring after the first frost or in fall before the ground freezes. This allows them enough time to establish their roots before extreme weather sets in. If you live somewhere with a mild climate, fall planting is ideal as it gives the plants a head start.

Bushes thrive in temperate climates with cold winters as they need a “chilling period” of about 1,000 hours below 40 degrees F to bloom. They also need full sun — at least 6 hours of direct sunlight daily — to reach their full potential. Partial shade may result in fewer blooms.

A well-draining soil that’s slightly alkaline is best. Mix in compost or aged manure before planting, and avoid heavy clay or areas prone to waterlogging. Lilac bushes can experience root rot in overly wet conditions.

Harvesting, Processing, and Using Lilac Flowers

Aim to pick your flowers at their peak bloom, which is typically in mid to late spring. Look for clusters that are fully open and very fragrant. It’s best to harvest in the morning when the flowers are most hydrated, but avoid cutting after rain. Use sharp pruning shears so you don’t damage the plant, and be sure to cut just above a leaf node. And don’t forget to leave some blooms on the bush for bees!

After harvesting, gently rinse the flowers to remove any dirt or insects. Pluck individual blossoms from the stem — you can discard the green parts as they can be bitter.

To air dry, spread the blossoms on a clean surface in a cool and dark area. Or, use a dehydrator on the lowest heat setting so you don’t damage the scent and color. Store the dried flowers in a glass jar away from any heat and light. They’ll keep for up to a year!

Ways to use lilac flowers 

• Tea: Add fresh or dried flowers to hot water to create a light and floral-tasting tea that supports calm nerves and soothes digestion. 
• Syrup: Simmer the blossoms with sugar and water to create syrup for drinks or pancakes.
• Tinctures and oils: Steep the flowers in alcohol or oil for a calming solution for stress relief or skin care. While they can be used, fresh, dried flowers reduce the risk of spoilage.
• Aromatherapy: Add dried flowers to potpourri and use as a natural air freshener.
• Crafting: Glue dried lilac flowers to bookmarks and other artwork.

Frequently Asked Questions about Lilacs

Are lilacs easy to grow?

Yes, lilac bushes are easy to grow, making them perfect for gardeners of all skill levels. They thrive in well-draining soil, full sunlight, and temperate climates with cold winters. Once the roots are established, they’re very hardy and low-maintenance plants that require minimal watering and only occasional pruning. With proper care, they can live for decades!

Where is the best place to plant lilac bushes?

The best place to plant a lilac bush is somewhere that gets at least 6 hours of direct sunlight daily, as these plants need full sun to bloom. Make sure to choose a well-draining soil, and don’t squish several bushes too closely together. Avoid water-logged areas as they are prone to root rot.

Can you grow lilac from a cutting?

Yes, you can grow lilac from a cutting, but it requires special care… and some patience! Begin with a 4-6 inch cutting from a healthy stem in late spring or early summer. Remove the lower leaves, dip the cut end in rooting hormone, and plant it in a pot with well-draining soil. The roots should develop in about 6-8 weeks.

Adding Beautiful Blooms to Your Garden

Growing lilac bushes will beautify your garden — and give you unlimited access to these beneficial blooms! Whether you want to use lilac for teas, syrups, tinctures, or simply to enjoy at home, these flowers offer something for everyone. These are a must have flower for your cottage garden and kitchen crafting.

Make sure to grab these free raised garden box plans so that you have even more space to grow flowers in your yard, and the Planning and Planting the Herb Garden e-book will help find a way for it all to fit! Which recipe will you use your lilacs in first?

Read on About Growing & Flowers

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• How to Preserve Flowers for Tea
• DIY Simple Syrup with Flowers