Perennial from Tuberous root. Deer resistant. Named for Lord Kelvin, the British scientist. Impressive fully double flowers up to 8-10" across. Stunning, long lasting cut flowers. Good for borders, pots or as a background accent plant. Attracts butterflies and hummingbirds. Bloom time: summer-fall. Bloom color: bright buttery yellow. Height: 36-48". Exposure: full sun. Water: moist. USDA Z8.