Corkscrew Rush Juncus effusus 'Spiralis'
Previously known as:
- Juncus effusus ssp. spiralis
- Phonetic Spelling
- JUN-kus eff-YOO-sus spir-AH-liss
- Description
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Corkscrew Rush is an easy to grow ornamental rush form of Juncus effusus with interesting twisted stems.
'Sparilis' has no leaves, but the stems are attractive, corkscrews which are both upright and prostrate, cylindrical, green, and smooth. They grow into a mass to form a clump 12 - 18 inches in height and equal spread. The late summer-blooming flowers are yellowish-green to brown in many-flowered cymes with an obovoid capsule following as fruit.
It can grow with 1 to 6 inches of water over the crown and works well in containers of 2 gallons or larger. They prefer full sun but can tolerate some shade. They require consistently moist soil and they grow well in pots and as houseplants.
Spreading and propagation are by division of the rhizomes and self-seeding which can be difficult to manage. Planting the rhizomes in in-ground pots with the lip above ground can help limit the spread. In zones with warm winters they can remain evergreen. In cooler climes, the foliage becomes yellow, then brown in fall to winter dying back to the ground.
This variety is more conducive to being a specimen plant than the straight stemmed variety and can be a graceful addition to patios or ponds.
- See this plant in the following landscape:
- Cultivars / Varieties:
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- Tags:
- Cultivars / Varieties:
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Attributes:
- Genus:
- Juncus
- Species:
- effusus
- Family:
- Juncaceae
- Life Cycle:
- Perennial
- Recommended Propagation Strategy:
- Division
- Play Value:
- Textural
- Dimensions:
- Height: 1 ft. 0 in. - 1 ft. 6 in.
- Width: 1 ft. 0 in. - 1 ft. 6 in.
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Whole Plant Traits:
- Plant Type:
- Herbaceous Perennial
- Houseplant
- Ornamental Grasses and Sedges
- Water Plant
- Woody Plant Leaf Characteristics:
- Semi-evergreen
- Habit/Form:
- Clumping
- Erect
- Mounding
- Growth Rate:
- Slow
- Maintenance:
- Low
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Cultural Conditions:
- Light:
- Full sun (6 or more hours of direct sunlight a day)
- Partial Shade (Direct sunlight only part of the day, 2-6 hours)
- Soil Texture:
- Clay
- Loam (Silt)
- Sand
- Soil pH:
- Neutral (6.0-8.0)
- Soil Drainage:
- Moist
- Occasional Flooding
- Occasionally Wet
- Available Space To Plant:
- Less than 12 inches
- 12 inches-3 feet
- NC Region:
- Coastal
- Mountains
- Piedmont
- USDA Plant Hardiness Zone:
- 5a, 5b, 6a, 6b, 7a, 7b, 8a, 8b, 9a, 9b, 10a, 10b, 11a, 11b
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Fruit:
- Fruit Type:
- Capsule
- Fruit Description:
- Obovoid
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Flowers:
- Flower Color:
- Cream/Tan
- White
- Flower Bloom Time:
- Summer
- Flower Shape:
- Irregular
- Flower Size:
- < 1 inch
- Flower Description:
- Spikey irregular yellowish-green to brown many-flowered cyme Small scaly flowers from July to September.
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Leaves:
- Woody Plant Leaf Characteristics:
- Semi-evergreen
- Leaf Color:
- Green
- Hairs Present:
- No
- Leaf Description:
- Bladeless green basal sheaths surrounding stems
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Stem:
- Stem Color:
- Green
- Stem Is Aromatic:
- No
- Stem Description:
- Contorted to corkscrew, dark green needle-like stems.
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Landscape:
- Landscape Location:
- Pond
- Riparian
- Landscape Theme:
- Children's Garden
- Rain Garden
- Water Garden
- Design Feature:
- Accent
- Specimen
- Resistance To Challenges:
- Wet Soil