Common Lilac (Syringa vulgaris) is an exceptionally cold and drought hardy shrub which produces a profusion of purple flowers that smell amazing. Their dense foliage makes them great for windbreaks or hedgerows.
These are 2nd year seedlings, 18 to 36 inches tall, bare root.
Photo Credit: Krzysztof Ziarnek, Kenraiz, CC BY-SA 4.0 <https://creativecommons.org/licenses/by-sa/4.0>, via Wikimedia Commons