Yarrow

Acorus calamus | Also known as: Achillea | Rating: 0 votes | Print / Pdf

Acorus calamus: the calamus is a symbol of love. You'd never tell by looking at it but the scent is rather lovely.

Acorus calamus or Sweet Flag has tall and narrow sweet scented bright green leaves that have a wavy edge, hence the name sweet flag. The leaves also have prominent veins. The oil from these leaves have been used in the perfume industry. The leaves have also been used in the construction of thatched roofs. It grows best in a very moist boggy area. It's a fast growing plant that can easily be grown from a root cutting. It has been used in traditional Chinese medicine as a sedative and a laxative.

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Plant
Known dangers?
  • no
Height [m]
  • 0.8 - 1
Spread [m]
  • 0.5
Dominant flower colour
  • Inconspicuous or absent
Flower Fragrance
  • No, neutral please
Flowering seasons
  • Mid summer
Foliage in spring
  • Green
Foliage in summer
  • Green
Foliage in Autumn
  • Green
Foliage in winter
  • Green
Propagation methods
  • division
Environment
Hardiness zone
  • Z10-11
Heat zone
  • H12-2
Winter temperatures [°C]
  • -1 - 4
Heat days
  • 1 - 210
Sun requirements
  • Full sun
  • Partial shade
Usage
Standard category
  • Flowers & bulbs
  • Perennials
Grown for
  • Ornamental Foliage
Creative category
  • For Beginners
  • Pond plants
Garden type
  • Bog garden
  • Cottage garden
  • Pond
Gardening expertise
  • beginner
Time to reach full size
  • 2 to 5 years
1 Related plants
Acorus calamus Variegatus

Yarrow 'Variegatus'

PLANTS Acorus calamus 'Variegatus'

Acorus calamus 'Variegatus' or Variegated Sweet flag is a type of grass with long, thin, variegated leaves that have arching tips and a pleasant fragrance, growing to around 5ft tall. This is an aquatic plant, thriving in boggy ground or at the edge of a pond. This plant will spread, so if you want to contain its growth, then plant it in a pot. You will need to keep it well watered though. If you have a boggy area of your garden, this is the perfect plant to make good use of that bothersome spot.