Acorus calamus
Sweet flag, Myrtle flag, Flagroot
- Height × spread
- 0.9m – 0.9m × 0.35m – 0.35m
- Position
- Full sun
Availability
Generally available in late Spring, Summer & early Autumn
Many plants are seasonal. Call 01234 567890 to check current stock.
About this plant
Attractive grass at home in very damp conditions. Arching sword-like foliage is the perfect edging around a pond. Some have bright variegated leaves in yellow or cream and brown flower spikes appear in summer to extend the interest further. It's not evergreen, disappearing over the winter to re-appear in spring. Grows to a height/spread of 90cm x 30cm.
- Foliage colour
- Green, Pink, White
- Variegated
- No
- Scent
- Yes, some varieties
- Shape
- Fan
- Height
- 0.9m – 0.9m
- Spread
- 0.35m – 0.35m
- Season of interest
- Spring, Summer, Autumn, Winter
- Evergreen
- Deciduous
- Garden style
- Winter garden, Water garden, Small scale garden, Scented garden
- Sun or shade
- Likes full sun, tolerates part shade, tolerates light shade
- Soil type
- Chalk, Clay, Loam (normal)
- Soil pH
- All types
- Drainage
- Moisture retentive soil, Damp and wet soil
- Winter hardiness
- Varies, most are hardy
- Borders & containers
- Borders
- Water depth
- Up to 15cm
- Use for
- Ground cover, Bird attraction
- Hazards
- No
Spring
Spring · Outdoors
Feed with aquatic plant food
As the plant is grown in water, feed with an aquatic feed as directed on the packet. Do not exceed the amounts given as this can affect the water.
Spring - late · Outdoors
Feed with slow release fertiliser
Apply a general purpose slow release fertiliser, spreading it around the root area of the plant as it is coming into growth. (Or apply a liquid feed at regular intervals throughout the growing season.)
This is a simple way to provide a nutrient boost as a single annual procedure.
Spring-Autumn · Outdoors
Water frequently to keep the soil moist
The plant thrives in moist or boggy soil, doesn't tolerate dryness and should be watered frequently, not only after a period of drought, but if the soil begins to dry out spring to autumn. Check plants in pots more frequently, especially in hot weather.
Spring · Planting
Divide when too large
The plant can be divided in alternate years. Clumps may be divided into two or more pieces. Rhizomes can be cut whilst small bulbs or offsets are detached. The new plants can be grown in a container or planted in the ground.
Found in
More Acorus
Acorus
Sweet flag
Acorus gramineus
Dwarf sweetflag, Grassy sweetflag
Acorus gramineus 'Ogon'
Dwarf sweetflag, Grassy sweetflag
Acorus gramineus 'Variegatus'
Dwarf sweetflag, Grassy sweetflag
Acorus gramineus
Dwarf sweetflag, Grassy sweetflag
Acorus gramineus 'Hakuro-nishiki'
Dwarf sweetflag, Grassy sweetflag
Acorus calamus 'Argenteostriatus'
Sweet flag, Myrtle flag, Flagroot
Acorus gramineus 'Golden Delight'
Japanese rush