June Tree of the Month-Japanese tree lilac

Perhaps you’ve noticed an unusual tree along streets or in parking lots with huge creamy-white flowers? This relative newcomer is Syringa reticulata, commonly known as Japanese tree lilac, and it’s not your grandmother’s lilac.

Tree lilacs differ from their purple-flowering shrubby cousins in almost every aspect. The larger size of the tree lilac-up to 40′ high makes it perfect for a street tree, park, or parking lot. It’s not for a tiny backyard or under powerlines. Although similar in shape to the common purple shrub lilac, the flowers are HUGE and, so far, only come in creamy white. These are highly fragrant, not unlike paperwhite bulbs. (Narcissus papyraceus)

The most notable year-round trait is the bark with its peely cinnamon color and prominent lenticels. Birds love to use the peeled bark ‘curls’ in nests, and bees and other pollinators love the flowers that last for 2-3 weeks in late spring. 

The leaves are similar to the common purple lilac but are less prone to the powdery mildew that plagues the common lilac. In fall, they turn a decent yellow. 

Some commonly found cultivars are ‘Ivory Silk’, CHINA SNOW/’Morton.’ or ‘Chantilly Lace’ with variegated leaves. It can be multi-stemmed but is usually found in a single stem form with an oval habit.

Full sun is preferred, but it will tolerate partial shade quite well. No serious pests or diseases; even deer seem to leave it alone. However, good drainage is a must.

What I love about this tree- A great 4 season tree: beautiful fragrant flowers, decent fall color, and amazing bark.

What I’m not crazy about-The beautiful flowers can leave a fine dusting of spent petals for weeks after blooming. I wouldn’t place it over a water feature. The scent is beautiful but strong. Something to keep in mind if you are overly sensitive to strong fragrances.

Words and photos by Jo Batzer

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