Japanese sweet flag 'Ogon' (Acorus gramineus 'Ogon')

Japanese sweet flag 'Ogon'

Also known as: Slender sweet flag 'Ogon', Japanese rush 'Ogon'

Japanese sweet flag 'Ogon' is a dwarf cultivar of the Japanese sweet flag. This cultivar is noted for its long narrow, sword-like leaves. The yellow and green stripes on its leaves differentiates this cultivar from its mother plant, whose leaves are solid green. Though variegated, japanese sweet flag 'Ogon' appears yellow at first glance.

Scientific classification

Sweet flag and allies

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Perennial

Lifespan

Herb

Plant Type

Summer

Bloom Time

30 cm

Plant Height

30 cm

Spread

Green, Yellow

Flower Color

Semi-evergreen

Leaf type

5 - 35 ℃

Ideal Temperature

Quickly Identify Japanese sweet flag 'Ogon'

Grass-like appearance with yellow variegated foliage.

Grows to 6-12 inches (15-30 cm) in height.

Tiny, yellow-green flowers on sedge-like spikes.

Thrives in moist soil and shallow water depths.

Spread roots gradually by rhizomes.

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Care Guide for Japanese sweet flag 'Ogon'

Every week

Water

Full sun

Sunlight

5 - 35 ℃

Ideal Temperature

Garden Soil

Soil Type

Water: Japanese sweet flag 'Ogon' thrives in consistently moist soil and high humidity, reflecting its wetland origins. Water weekly to maintain moisture. Ideal for outdoor gardens, japanese sweet flag 'Ogon' contributes lush golden foliage along ponds or streams, enhancing color in soggy conditions while tolerating brief dry spells.

Pruning: Japanese sweet flag 'Ogon' features grass-like, variegated foliage and needs minimal pruning. In early spring, trim dead leaves and spent flower stalks while avoiding the central clump. Proper pruning enhances growth and reduces disease risk. Use sterilized tools and consult horticultural guides for seasonal care tips.

Propagation: Japanese sweet flag 'Ogon' is effectively propagated by division. Separate rhizomes with sufficient roots and a growth point, replanting in moist, well-draining soil to prevent rot. Maintain consistent moisture and provide light shade for optimal post-transplant growth.

Repotting: Japanese sweet flag 'Ogon' should be refreshed biennially in spring to leverage post-dormancy vigor. It features tufted grassy leaves and prefers a slightly larger pot with good drainage. After repotting, ensure consistent moisture and partial shade to support recovery, handling the delicate roots gently.

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