Hardiness: USDA Zone 5a: to -28.8 °C (-20 °F) USDA Zone 5b: to -26.1 °C (-15 °F) USDA Zone 6a: to -23.3 °C (-10 °F) USDA Zone 6b: to -20.5 °C (-5 °F) USDA Zone 7a: to -17.7 °C (0 °F) USDA Zone 7b: to -14.9 °C (5 °F) USDA Zone 8a: to -12.2 °C (10 °F) USDA Zone 8b: to -9.4 °C (15 °F) USDA Zone 9a: to -6.6 °C (20 °F) USDA Zone 9b: to -3.8 °C (25 °F) USDA Zone 10a: to -1.1 °C (30 °F) USDA Zone 10b: to 1.7 °C (35 °F) USDA Zone 11: above 4.5 °C (40 °F)
Bloom Color: Blue-Violet Dark Purple/Black
Flower Fragrance: No fragrance
Bloom Shape: Bell
Bloom Diameter: Small - less than 2 inches (5 cm)
Bloom Time: Mid Spring Late Spring/Early Summer Mid Summer
Sun Exposure: Sun to Partial Shade
Other details: This plant is attractive to bees, butterflies and/or birds Drought-tolerant; suitable for xeriscaping Average Water Needs; Water regularly; do not overwater Flowers are good for cutting
Pruning Groups: Group 3 - Summer/Fall bloomers; prune hard in early spring
Patent Information: Non-patented
Propagation Methods: From softwood cuttings From semi-hardwood cuttings From seed; direct sow outdoors in fall From seed; stratify if sowing indoors From seed; sow indoors before last frost By grafting By serpentine layering
Seed Collecting: Allow seedheads to dry on plants; remove and collect seeds N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed
On May 22, 2013, sladeofsky from Louisville, KY (Zone 6b) wrote:
I absolutely adore this Clematis. It is a deep purple that looks best with a brighter companion, especially roses. It doesn't climb by tendrils, but it does look for vertical support and will grasp other plants or trellises with its leaf stems. It can grow rather large but is easily managed. It blooms in such profusion. It is truly a must have.
On Sep 23, 2012, lbuyer from Michigan City, IN (Zone 6a) wrote:
I've been growing this clematis since spring 2007 and I simply love it. It starts to bloom in the spring and continues right through to early fall. The bells are a lovely color and a welcome change from the big, gaudy, flat-faced hybrids with their seeming delicacy (in actuality, however, they seem tough as nails). I grow numerous other Clematis (Niobe, Jackmanii, Etoile Violette, Ville de Lyon) and, while they come and go, they always have rooguchi for a blooming companion (and its colors blend beautifully with everything).
On Feb 15, 2010, bfmayer70 from Buffalo, NY wrote:
Our Rooguchi plants thrive in Buffalo, New York, with very little care. Their blossoms are unique, and very colorful, and produce very pretty seedheads. The only problem we have is with powdery mildew - the Rooguchi seems to be particularly susceptable.
On Nov 17, 2009, mwburlin from Philadelphia, PA (Zone 7a) wrote:
Have planted this on an 8 ft arbor covered with wisteria. The rooguchi intertwines with the wisteria and blooms all summer. Doesn't cross the arbor arch portion but is lush to the top on sun drenched east side. bumble bees love the flowers which are profuse. Easy to strip out and prune ( group 3).
I have 3 of these and maybe it depends on where you live, but I prune it back every year. I did not do that the first year and it barely grew. Now it's thriving, and was 6 feet tall last year. I found all of mine on eBay, that's where I discovered it. It really does attract humming birds too. In the summer when this is blooming I have counted 8 to 10 humming birds at one time.
On Jun 1, 2006, doss from Stanford, CA (Zone 9b) wrote:
Clematis Rooguchi is herbacious meaning that it doesn't climb by tendrils. This makes it a great flower for scrambling through perennial gardens. You can still help it climb but it won't choke your plants if you let it wander among low shrubs, roses, or other plants.
On Sep 29, 2004, cceamore from Hixson, TN (Zone 7a) wrote:
I love this clematis because it has the longest bloom period I have ever seen for a clematis.It is a beautiful bell shaped dark purple flower with a royal purple/blue pattern on outside of petal.
The vine itself has black stems with dark green leaves.It likes some sun but seems to burn in direct sun plus the bells lose their pretty shape in full sun and it won't bloom as long.This is an outstanding but rare find. I f you find it then get it .You won't be disapointed.
This plant has been said to grow in the following regions:
Indian Springs Village, Alabama Anchorage, Alaska San Leandro, California Sebastopol, California Chiefland, Florida Cochran, Georgia Lawrenceville, Georgia Marietta, Georgia Coyne Center, Illinois Hanna City, Illinois Mattoon, Illinois Long Beach, Indiana Atalissa, Iowa Louisville, Kentucky Parkway Village, Kentucky Taylorsville, Kentucky Covington, Louisiana Gardiner, Maine Swampscott, Massachusetts Deephaven, Minnesota Finley Point, Montana Salem, New Hampshire East Freehold, New Jersey Santa Fe, New Mexico Southold, New York Apex, North Carolina Greensboro, North Carolina Eugene, Oregon Sherwood, Oregon Allentown, Pennsylvania Ashley, Pennsylvania Philadelphia, Pennsylvania Pittsburgh, Pennsylvania Middle Valley, Tennessee Houston, Texas Lewisville, Texas Orange, Texas Round Rock, Texas South Burlington, Vermont Fircrest, Washington South Hill, Washington