The fragrance and the complex, beautiful color of the flower clusters are two of my favorite things about lilacs (Syringa vulgaris). We had a lilac bush outside my bedroom window at the house where I grew up, in Denver. Since we didn’t have air conditioning, I’d get a sweet spring breeze when I opened up my windows during the day, to smell the intensely fragrant air. Between the lilacs and the snowball bush, it was heavenly! At our home in Indiana, we have a resident pink lilac bush that has a very subtle fragrance also near our bedroom window. And, we purchase an old fashioned, deeper purple lilac bush which…