Early Small Flowered, Group 1, Montana Group.  White.  Strong fragrance.  Single, cup-shaped bloom form.  Mid-to-late spring.  USDA zone 7b through 9b.  Height of up to 26' (up to 790 cm).   Colonel R.D. Alexander (1961).

5 favorite votes.  

Large-flowered, Late.  Single bloom form.  Mid-to-late summer.  USDA zone 4b through 9b.  Height of 10' to 13' (305 to 395 cm).   Alister Keay (1992).

5 favorite votes.  

Late Large Flowered.  Red, purple shading, white anthers.  Single, curved edge, overlapping bloom form.  Early summer to early autumn.  USDA zone 2a and warmer.   Dominic Harrington (1996).

5 favorite votes.  

Early Large Flowered, Group 2.  Pink, cream shading, darker edges.  Very large, single bloom form.  Late spring to early summer, early autumn.  USDA zone 4b through 9b.  Height of 8' to 10' (245 to 305 cm).   Vince & Sylvia Denny (1996).

5 favorite votes.  

USDA zone 2a and warmer.  

5 favorite votes.  

Early Small Flowered, Evergreen.  White.  Single, overlapping bloom form.  Early spring.  USDA zone 8b through 9b.  Height of 3" to 5" (8 to 13 cm).   Unknown in New Zealand (1975).

5 favorite votes.  

Herbaceous Group, Late, Small-flowered.  Purple, green shading.  Single, bell-shaped, curved tip bloom form.  Late spring to early summer.  USDA zone 4b through 9b.  Height of 18" to 2' (45 to 60 cm).   Unknown American origin (1767).

5 favorite votes.  

Group 3, Herbaceous Group, Late, Small-flowered.  Pink.  Mild fragrance.  Single, bell-shaped, nodding, twisted petals bloom form.  USDA zone 3b through 9b.  Height of 2' to 4' (60 to 120 cm).   Magnus Johnson (1952).

5 favorite votes.  

Group 3.  Deep blue.  Moderate fragrance.  Small, hyacinth-shaped bloom form.  Midsummer to early autumn.  USDA zone 2a and warmer.  Height of up to 39" (up to 100 cm).  

5 favorite votes.  Average rating: GOOD.  

Group 3, Viticella Group.  Light blue, darker stripes, yellow stamens.  Small, single bloom form.  Early summer to late autumn.  Height of 9' 10" to 13' 1" (300 to 400 cm).   Barry Fretwell (2010).

5 favorite votes.  

Early Large Flowered.  Light pink, green shading, blue edges, brown anthers, ages to white .  Medium to large, single bloom form.   C. J. Textor (1852).

5 favorite votes.  

Early Large Flowered, Group 2.  Light purple, purple stripes.  Large, single bloom form.  Late spring to early summer, late summer to early autumn.  USDA zone 6a and warmer.   L. Bakevicius (1988).

5 favorite votes.  

Group 3, Herbaceous Group, Late, Small-flowered.  White.  Small, single bloom form.  Early-to-late summer.  USDA zone 3b through 9b.  Height of 3' (90 cm).   Unknown in China, Unknown(Japan), Unknown(Korea), Unknown(Mongol

5 favorite votes.  

Group 3, Late, Small-flowered, Texensis-Viorna Group.  Red.  Small, single, tulip-shaped bloom form.  Midsummer to early autumn.  USDA zone 5b through 9b.  Height of 8' to 10' (245 to 305 cm).   Barry Fretwell (1984).

5 favorite votes.  

Early Large Flowered.  Pink.  Single, semi-double bloom form.  Late spring to early summer, late summer.  USDA zone 4b through 9b.  Height of 6' to 8' (185 to 245 cm).   George JACKMAN & Son (1873).

5 favorite votes.  

Large-flowered, Late.  Purple, red shading, darker center.  Single bloom form.  USDA zone 4b through 9b.  Height of 6' to 8' (185 to 245 cm).   Frank Watkinson (1991).

5 favorite votes.  

Early Small Flowered, Group 1, Montana Group.  Pink.  Vanilla fragrance.  Single bloom form.  Late spring to early summer.  USDA zone 6b through 9b (default).  Height of 20' to 30' (610 to 915 cm).   George JACKMAN & Son (1950).

5 favorite votes.  

Group 3, Tangutica Group.  Yellow, ages to light brown .  Single, bell-shaped bloom form.  Midsummer to midautumn.  Height of 25' to 33' 4" (760 to 1015 cm).   Friedrich Manfred Westphal (1996).

5 favorite votes.  

Group 3, Late Large Flowered.  Dark purple, dark red shading, light yellow anthers.  Very large, single bloom form.  Midsummer to early autumn.   George JACKMAN & Son (1858).

5 favorite votes.  

Early Large Flowered, Group 2.  Lavender, light pink stripes, light brown anthers.  Medium to large, single bloom form.  Late spring to early summer, late summer to early autumn.  USDA zone 2a and warmer.  Height of up to 6' 7" (up to 200 cm).   Uno Kivistik (1982).

5 favorite votes.  

White, purple stripes / flecks / streaks.  Bell-shaped bloom form.  USDA zone 2a and warmer.  

5 favorite votes.  

Tangutica Group.  Yellow.  Small, single bloom form.  Early to late autumn.  Height of 13' 1" to 16' 5" (400 to 500 cm).   Wim Snoeijer (1998).

5 favorite votes.  

Group 3, Tangutica Group.  Yellow, purple flecks, dark purple stamens.  Small, single bloom form.  Midsummer to midautumn.  Height of 9' 10" to 13' 1" (300 to 400 cm).   Wim Snoeijer (1997).

5 favorite votes.  

Large-flowered, Late.  Purple, yellow stamens.  Single, notched bloom form.  Mid-to-late summer.  USDA zone 5b through 8b.  Height of 8' to 10' (245 to 305 cm).   Uno Kivistik (1983).

5 favorite votes.