USDA Zone 3a: to -39.9 °C (-40 °F)
USDA Zone 3b: to -37.2 °C (-35 °F)
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)
My rating would be neutral to negative. Pretty but not at all a strong grower. Several of the bulbs have disappeared and the few that sti...Read More
T. 'Cummins' is bred by Vertuco B.V. and is under PBR. It came from a cross of T. 'Johan Gutenberg' and T. 'Canova'.
Prefers full sun, but can take a little shade. Can be grown in containers, too. In warmer climates, these bulbs need a chilling period be...Read More