Life Span
Perennial
Annual
Type
Tree
Shrubs
Origin
Europe, Eastern Europe, Southern Europe, Russia/Siberia, Iran, Central Asia, Southern Asia, Western Asia, India, Nepal, China
World/Pandemic
Types
Black walnut
Viola sororia, Viola odorata, Viola tricolor
Number of Varieties
30500
0
40000
👆🏻
Habitat
Cold Regions, Hills, Hillside
gardens, Grassland, Prairies, Tropical regions
USDA Hardiness Zone
4-8-9999
0
99
👆🏻
AHS Heat Zone
7-1
9 - 1
Sunset Zone
1a, 1b, 2a, 2b, 3a, 3b, 4, 5, 6, 7, 8, 9, 14, 15, 16, 17, 18, 19, 20, 21
A1, A2, A3, 1a, 1b, 2a, 2b, 3a, 3b, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
Habit
Oval or Rounded
Clump-Forming