The heliotrope is justly renowned for its cherry pie fragrance, which is all it's cracked up to be. This South American sub shrub has broad, course leaves that look tropical, and a somewhat gnarly growth habit.
Heliotrope blooms in midsummer, and produces only one flower head per stem. These in turn produce many smaller flowers continually, lasting upwards of a couple months each. While not stunningly beautiful, they're interesting to look at and smell nice for a long time.
You can start them from seed indoors which I advise if you want to make sure you get a fragrant variety. They sprout easily and grow slowly at first, but then become much invigorated once set out in early summer. This is an easy, rewarding plant that gets nods of approval from other gardeners...