Agastache urticifolia

RHS Plant Profile
nettle-leaved giant hyssop
nettle-leaved giant hyssop visionspictures.com

Other common names

horse nettle

Plants for pollinators
Herbaceous Perennial

A tall perennial up to 2m high, with square stems holding pairs of slightly glossy, strongly aromatic, lance-shaped to triangular green leaves with coarsely serrated edges. Short dense spikes of small pale pink, violet or white flowers are produced from mid to late summer

Position

Full sun, Partial shade

Soil Types

Chalk, Loam, Sand

Max Height

1.5-2.5 metres

Max Spread

0.5-1 metres

Size

Time to Maturity
2–5 years
Max Spread
0.5-1 metres
Max Height
1.5-2.5 metres

Growing Conditions

Chalk Loam Sand
Moisture
Moist but well–drained or Well–drained
pH
Acid or Alkaline or Neutral

Position

Full sun Partial shade
Aspect
East–facing or South–facing or West–facing
Exposure
Exposed or Sheltered
Hardiness
H4

Colour & Scent

Fragrance Foliage
Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Lamiaceae
Native to GB/Ireland
No
Foliage
Deciduous
Habit
Clump forming
Genus
Agastache are herbaceous perennials with simple, aromatic leaves and small 2-lipped tubular flowers in whorls forming dense spikes, in summer and autumn; some are rather tender but can be grown as annual bedding
Name Status
Correct

How to Grow

Cultivation

Thrives in fertile, moist but well-drained soil in sun or light shade

Propagation

Propagate by seed or by division in spring

Suggested planting locations and garden types

  • Architectural
  • Cottage and informal garden
  • Prairie planting
  • Wildflower meadow
  • Wildlife gardens
  • Flower borders and beds

Pruning

Remove spent flowering spikes as they fade

Pests

Generally pest-free

Diseases

May be susceptible to powdery mildews