Commercially available

• J.F. Quadra
• Quadra

43 favorite votes.  
Average rating: EXCELLENT-.  

Bred by Dr. Felicitas Svejda (Canada, 1981).
Introduced in Canada by Agriculture Canada L'Assomption Quebec in 1995 as 'Quadra'.

Hybrid Kordesii, Shrub.   (Series: Explorer Series Collection)  

Dark red, lighter reverse, ages to lighter .  None to mild fragrance.  66 petals.  Average diameter 3.25".  Borne mostly solitary, cluster-flowered, in small clusters, flat, quartered bloom form.  Blooms in flushes throughout the season.  Ovoid buds.  

Climbing, spreading.  Glossy, dark green, edged purple-red, leathery foliage.  

Height: 5'11" to 8' (180 to 245cm).  Width: 39" (100cm).

USDA zone 3b and warmer.  Can be used for cut flower, garden, landscape or pillar.  Very hardy.  Disease susceptibility: very disease resistant.  

United States - Patent No: PP 9,995  on  12 Apr 1997   VIEW USPTO PATENT
Application No: 08/661,097  on  10 Jun 1996

Tetraploid

James Grattan sent the correct parentage for this rose (source: the breeder's notes): Seed: (('Queen Elizabeth' x 'Arthur Bell') x ('Simonet double red' x 'Von Scharnhorst')). Pollen: ((R. kordesii x ('Red Dawn' x 'Suzanne' o.p.)) x ('Red Dawn' x 'Suzanne' o.p.)... thanks, James.