Over the years, the flowers have bloomed in different colors, ranging from light blue to dark purple. The colors depend on the acidity of the soil at the time. I've been told that you can control the color by putting pennies in the soil but some brief research on the internet would lead one to believe it's just an old wives' tale. I'll have to try it and find out...after all, the whole project would cost less than a dollar!
In the photo above the blooms had gotten so plentiful and heavy that they drooped down over the porch. Many times there is just a sliver of walkway remaining to get to the front door. Some well-meaning friends have questioned why I don't cut them back to make more room. I don't believe in cutting back! They are too pretty to sacrifice for a pathway.