News & Events

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

NEW - 2019 ILS Lilac Photo & Color Database!
The ILS Board has approved the sale of the first-ever 2019 ILS Lilac Photo and Color Database. 
It is available immediately for order in DVD format only.

Lilac dvd cover

The Database has 1,339 cultivars and taxons and 7,578 photos, more than double any previous database. In addition, all cultivars and taxons are listed in a spreadsheet file with species, hybridizer, year of introduction, flower form, and Wister code. And for the first time in history, more than 99% of them have flower and bud colors listed in digital RGB format with the proper coloring visible in the spreadsheet file. McKelvey/Ridgway color descriptions are included also for those that have such information. 

ILS Coloring Books
Kudos to the ILS Youth Committee which has developed a lilac inspired coloring book. The idea behind the book is to use it as an educational and promotional tool for the society, hoping to encourage kids to get involved, generate awareness of the society and ultimately increase our membership. 

To help offset the price of producing and shipping the book we are asking for a minimum donation of $1.00 per copy. If you would like to order more than 10 copies the price will be $.50 apiece. Members residing outside the US and Canada will need to contact Karen McCauley for pricing. 

To order please email or call: 
Karen McCauley, Treasurer 

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 lilac history, to care and maintenance. A heartfelt thanks to the authors John Alexander III and Nan Sinton.

The booklet retails for $4.95, but ILS members may purchase it for the discounted price of $2.00.  Bulk orders (over 50 copies) are available for $1.50 per copy.

Bulk Order S/H (US Only):

  • 50-100 copies - $15.00
  • 101-200 copies - $30.00
  • 201-300 copies - $45.00

Please contact Karen McCauley for additional information and shipping & handling charges at

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 contributing to a historical data set 6 decades long. Individuals such as yourself have been tracking the timing (or phenology) of cloned lilacs across the country since the 1950's. These historical records have been invaluable in documenting how plants are responding to changing climate conditions. Read more
Click here to learn how to get started

Lilac book released

Now available from Timber 
Lilacs: A Gardener's 
By John L. Fiala, Freek