The International Lilac Society (ILS) is a group of people who have a common interest in lilacs.

lilac bullet Do you grow lilacs?

lilac bullet Sell lilacs?

lilac bullet Know the DNA sequence of some lilacs?

lilac bullet Display lilacs for the public?

lilac bullet Or just like the way they look or smell?

If any of this applies to you, you are welcome at ILS!

A lilac in every garden. . . the world over!



Bringing lilac enthusiasts together since 1971!


Members from all over the world.


2600 lilac cultivars (varieties).

of Publications

Newsletters and Journals available.

Current News

  • Lilac Register is now a Printed Book!
    Announcing the availability of the International Lilac Society’s 2021 Edition of the “International Registry and Checklist of Cultivar Names in the Genus Syringa L. (Oleaceae)”! This is the […]
  • 2022 Convention Scheduled
    SAVE THE DATE ILS 2022 Convention Rochester, New York Thursday May 12, 2022 – Saturday May 14, 2022 Finally, the US borders are starting to reopen […]
  • Support scientific research while enjoying lilacs in your yard!
    You are invited to join forces with the USA National Phenology Network and track the timing of flower and leaf events in a cloned lilac, thereby […]
  • Lilac Booklets for Sale!
    The revised lilac booklet Lilacs; Plants of History-Plants for Tomorrow, 2nd edition is available. This is a great “how to” 24 page guide covering everything from […]
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International Lilac Society

Announcing the 2020 ILS Lilac Photo & Color Database!

The ILS Board has approved the sale of the second, revised, massively updated 2020 ILS Lilac Photo and Color Database. It is available immediately for order in DVD or USB-A flash drive formats only.
(Left: Lilac DVD cover)

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