Photo by Melody

PlantFiles: Hybrid Sweet Autumn Clematis, Sweet Autumn Virgin's Bower, Japanese Clematis
Clematis 'Sweet Summer Love'

Family: Ranunculaceae (ra-nun-kew-LAY-see-ee) (Info)
Genus: Clematis (KLEM-uh-tiss) (Info)
Cultivar: Sweet Summer Love
Additional cultivar information: (PPAF)
Hybridized by Marczyski

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7 vendors have this plant for sale.

2 members have or want this plant for trade.

Late Mixed

20-30 ft. (6-9 m)

9-12 in. (22-30 cm)

USDA Zone 4a: to -34.4 C (-30 F)
USDA Zone 4b: to -31.6 C (-25 F)
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)

Bloom Color:

Flower Fragrance:
Very Fragrant

Bloom Shape:

Bloom Diameter:
Small - less than 2 inches (5 cm)

Bloom Time:
Late Summer/Early Fall
Mid Fall

Sun Exposure:
Sun to Partial Shade

Other details:
May be a noxious weed or invasive
Average Water Needs; Water regularly; do not overwater

All parts of plant are poisonous if ingested
Handling plant may cause skin irritation or allergic reaction

Pruning Groups:
Group 3 - Summer/Fall bloomers; prune hard in early spring

Patent Information:

Propagation Methods:
From seed; direct sow outdoors in fall

Seed Collecting:
Allow seedheads to dry on plants; remove and collect seeds

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No positives
1 neutral
No negatives

Gardeners' Notes:

Neutral coriaceous On Jul 3, 2014, coriaceous from ROSLINDALE, MA wrote:

Graham Rice says that it reaches 11 feet in height and blooms from early July to September, and that it's intensely fragrant. Flowers are just under 2", opening deep red and aging through purple to violet.

A new hybrid that first bloomed in 2007, bred by Szczepan Marczynski in Poland. He prefers not to reveal the parents and states only that it's related to C. flammula, commonly called virgin's bower. It should not be confused with sweet autumn clematis or Japanese clematis (C. terniflora, now called C. paniculata again), a rampant grower which can be invasive.

Patented. USPP 24044. Unauthorized propagation prohibited.

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