Family: Oleaceae

Scientific Name: Syringa x hyacinthiflora Sweetheart

Common Name: Sweetheart Lilac


Sweetheart Lilac (Syringa x  hyacinthiflora) is an interspecific hybrid with Syringa hyacinthia genes.  Blooms up to 10 days sooner than many of the other LIlacs. Has fragrant pink and white flowers.

Plant TypeShrubs Deciduous
Hardiness Zone3-9
Sunlightfull, mostly sunny
Soil & Siteaverage, avoid wet soggy sites
Flowerslight pink and white florets , fragrant, large, early
Fruitseeds in loose clusters of brown beaked dehiscent capsules
Leavessimple, green leaves, may suffer from powdery mildew in the fall, best planted where it has good air circulation
Stemshas raised lenticels
Dimensions10 plus by 8 plus feet (HS), too large for use near the house, best used as specimen plants or in shrub borders, can be used on corner plantings as long as given 6-8 feet from the corner
MaintenanceThere are many different ways to prune a Lilac. The most drastic is to cut them down to the ground. Using this method I have had ones sucker back and regrow while others that didn't make. You can cut out the old stems and let the new suckers fill in thinning them to the desired amount. On many old plants we have removed all the suckers and left a few of the old stalks. Pruning them up to bare base stems, turning the plant into a small tree. Width can be controlled by pruning them back 1-2 or more nodes. Drastic pruning may delay flowering a few years. Since Lilacs bloom on next season’s wood, prune after they are done blooming
Propagationdivision of suckers, softwood cuttings
Native SiteLilac is native to Europe and has been in cultivation since the 16th century.
Cultivar OriginIntroduced by Clarke in 1953
Notes & Reference#01-Manual of Woody Landscape Plants (Michael Dirr), #104-Lilacs A Gardeners Encyclopedia (Fiala), #144-Missouri Botanical Gardens website (
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