Japanese Sweet Flag
Acorus gramineus 'Ogon'
Japanese Sweet Flag is a grass for edging, groundcover, suited to full sun to partial shade and moist ground, flowering varies by climate.
| Type | Grass |
|---|---|
| Mature height | 25 cm |
| Spread | 30 cm |
| Aspect | full sun to partial shade |
| Foliage | Evergreen |
| Hardiness | USDA 5a-9b, RHS H6 |
| Pollinator-friendly | No |
| Pet-safe | Not confirmed |
Where to use it in a border
At around 25 cm, it sits best along the front edge, where a low, spreading habit reads best. Give it about 30 cm of room to spread, roughly 3 to the metre when planted in a drift. It is hardy across USDA zones 5a to 9b and rated H6 by the RHS, so check it suits your area before planting.
It appears in our lists of full sun, wet soil, evergreen plants.
Border Builder uses Japanese Sweet Flag's height, spread, soil, bloom months and companions to place it in a full border plan for your own conditions, on iPhone and iPad.
Flowering through the year
Worth knowing
- Evergreen, so it keeps the border furnished through winter.
- It copes with ground that stays wet, which most border plants will not.
Good companions
Plants that share its conditions and style, chosen to complement its place in the border:
- Japanese iris 'Activity'for height behind it
- Japanese Water Irisfor height behind it
- Astilbe 'Visions'to edge in front
- Aztec Lilyto flower when it does not
- Calla Lilyfor height behind it
- Camassiato flower when it does not