Juncus 'Carman's Japan' (Carman's Sacred Japanese Rush) - This evergreen clump-forming rush grows 18-24 inches tall, with bright green, thin, narrow stems of a fine texture and an overall graceful form. Year round appear the brown flowers along the side of the stems below the tips.
Plant this rush in full sun to light shade in moist soil, a pond to a depth of 4 inches, or in areas that gets only occasional irrigation. It is hardy to below 15 degrees F - how much so we do not know. This plant seeds about in the garden but not in great quantities so it really does not seem pesky. Besides the nice foliage the brown flowers are attractive and useful in small flower arrangements.
We consider this plant a Carman Nursery introduction. The story as we have it from John Greenlee is that Ed Carman was delivering plants to a garden in Woodside, California that was being worked on by a Japanese master garden designer and stonemason, who noted that he always included this elegant rush in his gardens and gave a plant to Ed - John Greenlee purchased a plant at Carman's Nursery in the mid 1980s and subsequently named it 'Carman's Japan'. We received this plant from John Greenlee in 1987 and have grown it in our nursery ever since.
This cultivar was listed as a selection of Juncus effusus by Rick Darke in his book The Color Encyclopedia of Ornamental Grasses, where he calls the plant 'Carman's Japanese'. The name for the genus comes from the Latin word 'iuncus' which was the ancient word for Rushes and came from the word 'iungere' meaning "to join" and was in reference to the use of rushes for cordage and tying.
Information about Juncus 'Carman's Japan' displayed on this page is based on our research about it conducted in our library and gathered from reliable online sources. We include observations made of this plant as it grows in our nursery gardens and in other gardens that we have visited, as well as how the crops have performed in containers in our own nursery field. We will also incorporate comments that we receive from others about this plant when we feel it adds information and particularly welcome hearing from anyone who has any additional cultural recommendations that would aid others in growing it.