Hyssop, a perennial in the genus Agastache, includes thirty different species that are known for their aromatic foliage and long-lasting, dramatic flowers. Agastache derives from the Greek words for "much" (agan) and "grain stalk" (stachys) in reference to the flower spikes. The dramatic flower spikes attract winged beauties like hummingbirds, butterflies and bumblebees to the garden. Versatile, hyssop have the ability to tolerate heat and frost.
Hyssop 'Summer Love'
Hyssop 'Summer Love' (Agastache 'Summer Love') is an herbaceous perennial flower that has a clumping, upright growth habit. It grows 2 to 3 feet tall and up to 2 feet wide, creating an ideal plant to grow along flower borders and beds. The two-lipped, tubular-shaped, red to purple flowers grow on upright, 12-inch-tall, salvia-like spikes that attract hummingbirds and butterflies to the garden. 'Summer Love' has a long blooming season to flower from summer and lasting into fall. The mint-scented, lance- to oval-shaped foliage are bright green in color. Hyssop 'Summer Love' grows best in full sun to part shade and well-drained, nutrient-rich soil. According to Missouri Botanical Garden, 'Summer Love' plants tolerate heat and some dry soils once established. To promote a long blooming season, deadhead the spent flower blooms. Plant 'Summer Love' in USDA zones 6 to 9.
Sunset hyssop (Agastache rupestris) is a variety of hyssop that has a vigorous growth and clumping growth habit. According to Fine Gardening Magazine Online, sunset hyssop "encapsulates a Western sunset in its flowers: bronze with hints of orange and yellow, and streaks of magenta and pink along the margins." Sunset hyssop grows 1 to 3 feet tall and emerges in summer to bloom heavily in August and lasting into fall. The fragrant blooms on sunset hyssop attract butterflies. They grow best in full sun to part shade and well-drained, dry to medium soil. Plant hyssop sunset in USDA zones 5 to 10.
Hyssop 'Blue Fortune'
Hyssop 'Blue Fortune' (Agastache 'Blue Fortune') is a woody-based perennial flower in the mint family. It grows up to 3 feet tall and 2 feet wide and has leaves that can be used to flavor drinks, as well as added to potpourri. The tube-shaped, tiny blooms on 'Blue Fortune' are tightly packed and comprised of rounded verticillasters or false whorls. The whorls grow along the 4-inch-long terminal spikes. The oval- to lance-shaped, 4-inch-long mint to anise flavored leaves are attached to the stiff, square stems that grow up to 3 feet tall. Hyssop 'Blue Fortune' grows best in full sun to part shade and well-drained soil. Plant 'Blue Fortune' in USDA zones 5 to 9.