Alphabetical Plant Listing

Agastache nepetoides (Yellow Giant Hyssop)

Yellow Giant Hyssop


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 in 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.

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Requirements

Hardiness 2 – 8
Plant Type Perennials
Plant Family Agastache - Hyssops
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)
Water Needs Average
Maintenance Low
Soil Type Chalk, Clay, Loam, Sand
Soil pH Acid, Neutral
Soil Drainage Moist but Well-Drained, Well-Drained
Characteristics Showy
Native Plants United States, Midwest, Illinois, Indiana, Iowa, Kansas, Michigan, Minnesota, Missouri, Nebraska, Ohio, South Dakota, Wisconsin, Northeast, Connecticut, Delaware, Massachusetts, Maryland, New Jersey, New York, Pennsylvania, Vermont, Southeast, Alabama, Arkansas, Georgia, Kentucky, North Carolina, South Carolina, Tennessee, Virginia, West Virginia, Southwest, Oklahoma
Tolerance Deer
Attracts Butterflies
Garden Uses Beds and Borders
Garden Styles Informal and Cottage, Prairie and Meadow

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By JurateBuiviene, Shutterstock

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.


Requirements

Hardiness 2 – 8
Plant Type Perennials
Plant Family Agastache - Hyssops
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)
Water Needs Average
Maintenance Low
Soil Type Chalk, Clay, Loam, Sand
Soil pH Acid, Neutral
Soil Drainage Moist but Well-Drained, Well-Drained
Characteristics Showy
Native Plants United States, Midwest, Illinois, Indiana, Iowa, Kansas, Michigan, Minnesota, Missouri, Nebraska, Ohio, South Dakota, Wisconsin, Northeast, Connecticut, Delaware, Massachusetts, Maryland, New Jersey, New York, Pennsylvania, Vermont, Southeast, Alabama, Arkansas, Georgia, Kentucky, North Carolina, South Carolina, Tennessee, Virginia, West Virginia, Southwest, Oklahoma
Tolerance Deer
Attracts Butterflies
Garden Uses Beds and Borders
Garden Styles Informal and Cottage, Prairie and Meadow

Great Plant Combination Ideas with Agastache - Hyssops

Guides with Agastache - Hyssops

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