These days there are many wonderful Hyssop cultivars to grow and experiment with in your garden, But the common Anise Hyssop ( Agastache foeniculum) and the Purple Giant Hyssop, being featured here, give you the strongest minty-licorice scent. The fragrance is mainly in the leaves, but Purple Giant Hyssop is also a long blooming perennial, with short, spiky lavender-purple flowers that start to bloom in midsummer and carry on to fall. You will have to share the flowers with the bees and pollinators, that find it irresistible. Giant Purple Hyssop is very adaptable and can even handle high humidity better than most hyssop varieties. It makes a nice cut flower and a delicious minty tea.
Height: 1 - 3 ft.
Width: 1 - 3 ft.
Hardiness Zone: USDA zones5 - 9
Exposure: Full sun
To really enjoy the rich vanilla scent of Heliotrope, you need to plant a good size clump of it. You won't be sorry you did. The flower clusters come in purple and white and sit atop dense, deep, green foliage. The plants are not tall, and make a nice front of the border plant, where you can really enjoy their fragrance. They got the name Heliotrope, because they follow the sun, shifting their flower heads as the sun moves across the sky, like sunflowers. Plant them in a sunny location, because the heat helps them release their fragrance. Much like Valerian, some people pick up a hint of cherry along with the vanilla scent, which gives heliotrope the common name "the cherry pie plant".
Height: 18 - 24 inches
Width: 12 - 15 inches
Hardiness Zone: USDA zones 10 - 11
Exposure: Full sun to partial shade
Taken from http://gardening.about.com/od/flowergardening/ss/Deliciously-Fragrant-
till next time, this is Becky Litterer from Becky's Greenhouse, Dougherty, Iowa