Acorus gramineus 'Ogon'
Common name: Golden sweet flag, golden Japanese sweet flag, or Japanese rush (a.k.a. 'Wogon').
Zone: (5) 6 to 10,
evergreen in warm zones.
Sun to part shade, aquatic or wetland perennial.
Mature size: 6 to 12 inches tall, with 1/4 inch wide blade. Narrow, grass-like, dwarf plant has yellow and chartreuse variegated leaf blades, that appear golden yellow. Tiny, densely-packed, greenish-yellow flowers emerge in late spring to early summer. Iris-like tufts will spread to form a dense ground cover, but is not invasive.
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These plants arrived in great shape even though the carrier kept pushing off the delivery date. Nice roots, neither sparse nor rootbound, perfect. They're in the ground now and look fantastic. I will just add that it is wonderful to get boxes from a nursery that are EASY TO OPEN. That doesn't count as a review of the plants, but it's a major perk.