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| Category: Grass-like |
| Family: Acoraceae (~ Araceae) |
| Origin: Europe, Northern (Europe) |
| Evergreen: Yes |
| Yellow/Chartreuse Foliage: Yes |
| Variegated Foliage: Yes |
| Flower Color: Insignificant |
| Bloomtime: Not Significant |
| Height: <1 foot |
| Width: Spreading |
| Exposure: Sun or Shade |
| Irrigation (H2O Info): Medium Water Needs |
| Winter Hardiness: < 0 °F |
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Acorus gramineus 'Ogon' (Yellow-leaved Calamus) - Grass-like perennial with thin iris-like arching foliage that has a rich yellow variegation. Grows to 6-12 inches tall and spreads slowly by rhizomes. Tiny, insignificant, yellow-green flowers bloom from spring to early summer on lateral, sedge-like flower spikes but are hardly noticeable. Plant in full sun to light shade in soil that is moist or regularly irrigated. In a pond the water depth should be right at the soil line or up to 2 to 4 inches above crown. Hardy to USDA Zone 5 (-10°F). The rich yellow foliage distinguishes this plant from the cultivar 'Variegatus', which is green with thin cream stripes, often along one leaf margin. Useful massed or as an accent; use to light up a dark area of the pond and is a particularly nice plant in as a pot or tub subject or used as a small scale groundcover. The species Acorus gramineus, commonly called grassy-leaved sweet flag, is native to wetland areas of China, Japan, Korea, India, Thailand, Myanmar and the Philippines. The name for the genus was one that Theophrastus, the Greek considered to be the "father of botany", used for a plant with an aromatic rhizome. The specific epithet comes from the Latin word meaning "grass". The genus Acorus is considered to be one of the most primitive of the monocots still in existence. Historically it was recognized as an aberrant genus within the arum family (Araceae), which includes such plants as calla lily and Taro, but much evidence, including the absence of a spathe common to aroids, supports its treatment as a separate family and it is now placed in its own family, the Acoraceae.
This information about Acorus gramineus 'Ogon' displayed is based on research conducted in our library and from reliable online resources. We will also note observations that we have made about it as it grows in the gardens in our nursery and those elsewhere, as well how the crops have performed in containers in our nursery field. We will also incorporate comments we receive from others, and we welcome hearing from anyone with additional information, particularly if they can share cultural information that would aid others in growing it.
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