Agapanthus is one of the ancient plants with romantic common names. Most common is Lily of the Nile, or Blue African Lily, but the botanical name comes from the Greek word meaning love, so its also sometimes known as The Flower of Love.
Whatever you call it, you'll love it in your garden. Its a shade plant that demands moisture, but good drainage. The stems rise about waist high, and open vivid blue flower clusters that are rounded or globe-like, something like an Allium, but with a looser, softer look. Full bloom happens in mid and late summer. This plant is native to South Africa, so can take plenty of heat, as long as it has some shade and plenty of moisture.