What are Lilacs?

Many lilacs are purple, but they can also bloom in other colors.
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  • Written By: Mary McMahon
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  • Last Modified Date: 19 October 2014
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Lilacs are highly aromatic ornamental flowers which are particularly prized in old fashioned gardens. Many cultivars are also highly drought tolerant, making them excellent additions to low water gardens since they have rich green foliage in addition to their famous flowers. When lilacs are grown in conditions which they like, they can develop into small trees, and live for hundreds of years. In some regions, lilacs are also known as “pipe bushes,” because of the hollow branches which appear in some young cultivars.

The flowering bush is in the olive family, along with a large number of other ornamental and drought tolerant plants. All lilacs are in the genus Syringa, although several species are commercially cultivated. Most people associate lilacs with white or purple flowers, but lilacs can also bloom in red, yellow, and orange, among other colors. The plants have dark green simple leaves and a bushy growth habit which requires plenty of room in the yard, since cramped quarters can lead to moldy conditions.

The United States has a long tradition of lilac cultivation, especially in New York State. Many famous sites around the United States have ancient lilac bushes, but Rochester, New York has the most impressive collection of lilac cultivars. The city has an annual lilac festival to celebrate the numerous plants of the city, and in 2006 lilacs were designated the official New York State Bush, in recognition of the proud place they have in the state's history.


Like many other drought tolerant plants, lilacs often prefer to be left largely alone. Pruning of the plants should be minimal, and they do well in poor soil, as long as it is well drained. Lilacs should be offered water periodically, but not to excess, and they are hardy as far North as USDA zone four, although extremely cold weather may inhibit the blooming of the plants. Cultivating lilacs is relatively easy, and the plants are easy to obtain from garden stores.

In addition to old fashioned gardens, butterfly gardens also often feature lilacs, since they attract butterflies and other insects. The flowering bushes can also be used in other gardens, of course, although gardeners should be careful about planting them near other aromatic plants, since the scents could potentially clash. Lilacs should also not be planted in close proximity to a structure, since the building may cramp the growth habit of the plant.


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Post 1

Birds and bees also like the beautiful, fragrant lilacs.

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