Did you know that there are over 2000 named lilac cultivars (cultivated varieties) of lilacs throughout the earth?
Read more about lilacs at the International Lilac Registrar
web site. This web site provides a bit of background on cultivar name
registration, has a link to the downloadable Register files (lists of
named lilac cultivars), and has contact information to the Registrar.
Lilac Color and Classifications
Lilacs are categorized by
color and by whether the bloom is single or "double." (In fact, there
are several kinds of double lilac blooms, and even some triples that are
classed as doubles.) The bloom is listed as "S" for Single, or "D" for
Lilac blooms are graded for
color when 1/3 of the buds burst open. Color evaluation should take
place in the shade before the bloom has a chance to fade. Of course,
your own lilacs may exhibit differences in color from the official color
grade. Differences in color can result from such things as soil pH,
local climate or recent weather, and how much sunlight your plant
Roman numerals are used for listing lilac colors. The following colors are the names used for lilacs:
- I - White
- II - Violet
- III - Blue
- IV - Lilac
- V - Pink
- VI - Magenta
- VII - Purple
(Some European organizations also recognize VIII - Creamy Yellow.) So, for instance, a lilac that is "S V" is a single pink lilac.
View the 4 year Lilac Study at Lilacia Park, The Morton Arboretum, etc. (published in 1978) to learn more about your own lilac collections.
If you have Lilac photos you would like share and have posted on our website, please send photos to firstname.lastname@example.org.