Acorus gramineus is commonly called grassy-leaved sweet flag. It is native to wetland areas of China, Japan, Korea, India, Thailand, Myanmar and the Philippines. 'Ogon' is a dwarf plant which features iris-like tufts of narrow, grass-like, variegated leaf blades (6-12" tall and 1/4" wide) which are striped with yellow and green but primarily appear as yellow.

Sweet flag is easily grown in average, medium to wet soils in full sun to part shade and perform well in both boggy conditions and consistently moist garden soils. Never allow soils to dry out. Plants appreciate some relief from hot summer sun (e.g., afternoon shade or filtered sun) when grown in hot summer climates. Foliage is sweetly fragrant when bruised (hence the common name of sweet flag).

Exposure: Full sun, part shade
Soil: medium to wet
Hardiness: USDA Zones 5-9