Sweet flag
Acorus calamus
A fragrant, iris-like aquatic perennial perfect for boggy water gardens.
- Plant Type
- Perennials & Annuals
- Width
- 2-3 Ft.
- Height
- 12-18 In.
- USDA hardiness zone
- 4 - 9
- Sun requirements
- Full Sun, Part Shade
- Design image count
- 4
Design images (4)
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Create design onlineAbout Sweet flag
Acorus calamus is a hardy, deciduous aquatic perennial known for its sword-shaped, bright green foliage that resembles iris leaves. Growing in dense basal clumps up to 30 inches tall, it spreads slowly via thick, aromatic rhizomes. This versatile plant thrives in full sun to part shade and requires consistently wet or boggy soils, even tolerating shallow standing water. Historically valued for its medicinal properties, it is now primarily used as a decorative accent for pond margins and rain gardens.