• bulb, tuber, corm

• -20 to -30ºF ZONE 4
• -10 to -20ºF ZONE 5
• 0 to -10ºF ZONE 6
• 10 to 0ºF ZONE 7

• early spring

• full sun

• Yes

Keizerskroon Tulip (Tulipa) is susceptible to root and bulb rots in wet or poorly drained soil, gray mold, slugs, snails, aphids, and nematodes

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

• Less then 1 day ZONE 1
• 1 to 7 days ZONE 2
• 7 to 14 days ZONE 3
• 14 to 30 days ZONE 4
• 30 to 45 days ZONE 5
• 45 to 60 days ZONE 6
• 60 to 90 days ZONE 7