Notes: Keizerskroon Tulip (Tulipa) is a bulbous perennial with lance-shaped leaves.
Care: Most tulips require a long winter and thrive in zone 4-6. In zone 7-8 fewer are adaptable and in 9-10 they should be grown as annuals or chilled for the winter. Bulbs must be pre-cooled at 40-45 degrees F for 8 to 10 weeks before planting. Remove faded flowers but don't cut back stems or foliage until they are brown. Tulips need these to create energy for next years blooms. In warmer zones plant in shaded part of the garden.
Bulb planting depth: 8" to base of the bulb
Group: Single Early/Early
Keizerskroon Tulip is: Deciduous
Habit: Clump-forming, Erect
Years to Maturity: 1-2 years (depending on bulb size)
Toxicity: Eating may cause severe discomfort and may cause a skin allergy.
Source: Various resources including The American Horticultural Society A to Z Encyclopedia of Garden Plants and the USDA