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Agastache nepetoides (Yellow Giant Hyssop)

Yellow Giant Hyssop

Agastache nepetoides, Yellow Giant Hyssop, White Agastache, White Hyssop, White Korean Mint
Agastache nepetoides, Yellow Giant Hyssop, White Agastache, White Hyssop, White Korean Mint

An exclamation mark in the landscape throughout the winter, Agastache nepetoides (Yellow Giant Hyssop) is a tall herbaceous perennial boasting vertical spikes, 4-16 in. long (10-40 cm), packed with tiny, pale yellow flowers. Blooming for about 1-2 months from mid-summer to fall, they are borne atop stiff, square stems and attract bees, butterflies, and other beneficial pollinators. The tiny flowers are not particularly showy because only a few of them are in bloom at the same time. The beauty of Yellow Giant Hyssop consists primarily of its foliage of toothed, arrowhead-shaped, medium to dark green leaves. Unlike most mint family members, Yellow Giant Hyssop lacks their minty fragrance. The flowers give way to small seeds that will readily self-germinate in the spring. The root system of Yellow Giant Hyssop is fibrous and rhizomatous, allowing the plant to spread and form colonies without being aggressive.

  • Grows up to 4-6 ft. tall (120-180 cm) and 1-3 ft. wide (30-90 cm).
  • Thrives in average, medium moisture, well-drained soil in full sun to part shade. This plant dislikes dry sunny areas, which will cause the foliage to wilt during a summer drought.
  • Provides a bold impact in borders, cottage gardens, butterfly gardens, or in prairie plantings.
  • No serious pest or disease issues. Deer resistant.
  • Native to the United States and Canada.

Requirements

Hardiness 2 - 8
Plant Type Perennials
Plant Family Lamiaceae
Genus Agastache
Common names Hyssop
Exposure Full Sun
Season of Interest Summer (Mid, Late)
Fall
Height 4' - 6'
(120cm - 180cm)
Spread 1' - 3'
(30cm - 90cm)
Spacing 24" - 36"
(60cm - 90cm)
Maintenance Low
Water Needs Average
Soil Type Chalk, Clay, Loam, Sand
Soil pH Acid, Neutral
Soil Drainage Moist but Well-Drained, Well-Drained
Characteristics Showy
Native Plants United States, New Jersey, Vermont, New York, Pennsylvania, Delaware, Connecticut, Maryland, Massachusetts, Southwest, Southeast, Northeast, Midwest, Missouri, Minnesota, Indiana, Illinois, Iowa, Wisconsin, South Dakota, Kansas, Michigan, Nebraska, Ohio, South Carolina, West Virginia, Tennessee, Virginia, Georgia, North Carolina, Alabama, Arkansas, Kentucky, Oklahoma
Tolerance Deer
Attracts Bees, Butterflies
Garden Uses Beds And Borders
Garden Styles Informal and Cottage, Prairie and Meadow
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Alternative Plants to Consider

Agastache cana (Texas Hummingbird Mint)
Agastache ‘Raspberry Summer’ (Hummingbird Mint)
Agastache ‘Summer Fiesta’ (Hummingbird Mint)
Agastache ‘Summer Glow’ (Hummingbird Mint)
Agastache ‘Kudos Red’ (Hummingbird Mint)
Agastache POQUITO Butter Yellow (Dwarf Hummingbird Mint)

Recommended Companion Plants

Acer saccharum (Sugar Maple)
Celtis occidentalis (Common Hackberry)
Lindera benzoin (Spice Bush)
Liriodendron tulipifera (Tulip Tree)
Ostrya virginiana (American Hop Hornbeam)
Tilia americana (American Basswood)

Find In One of Our Guides or Gardens

How to Create an Enchanting Butterfly Garden
For the Love of Butterflies: Best Flowers to Attract them to Your Garden
6 Reasons You Should Create a Butterfly Garden
For the Love of Bees: Best Flowers to Attract them to Your Garden
How to Cultivate a Thriving Bee-Friendly Garden
Hummingbird
Wonderful Plants That Repel Insects
Agastache (Hyssop)
Best Flowers to Attract Hummingbirds
While every effort has been made to describe these plants accurately, please keep in mind that height, bloom time, and color may differ in various climates. The description of these plants has been written based on numerous outside resources.
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Requirements

Hardiness 2 - 8
Plant Type Perennials
Plant Family Lamiaceae
Genus Agastache
Common names Hyssop
Exposure Full Sun
Season of Interest Summer (Mid, Late)
Fall
Height 4' - 6'
(120cm - 180cm)
Spread 1' - 3'
(30cm - 90cm)
Spacing 24" - 36"
(60cm - 90cm)
Maintenance Low
Water Needs Average
Soil Type Chalk, Clay, Loam, Sand
Soil pH Acid, Neutral
Soil Drainage Moist but Well-Drained, Well-Drained
Characteristics Showy
Native Plants United States, New Jersey, Vermont, New York, Pennsylvania, Delaware, Connecticut, Maryland, Massachusetts, Southwest, Southeast, Northeast, Midwest, Missouri, Minnesota, Indiana, Illinois, Iowa, Wisconsin, South Dakota, Kansas, Michigan, Nebraska, Ohio, South Carolina, West Virginia, Tennessee, Virginia, Georgia, North Carolina, Alabama, Arkansas, Kentucky, Oklahoma
Tolerance Deer
Attracts Bees, Butterflies
Garden Uses Beds And Borders
Garden Styles Informal and Cottage, Prairie and Meadow
How Many Plants
Do I Need?
Explore Great Plant Combination Ideas
Agastache (Hyssop)
Guides with
Agastache (Hyssop)
Not sure which Agastache (Hyssop) to pick?
Compare Now

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