Alphabetical Plant Listing

Iris hollandica 'Professor Blaauw' (Dutch Iris)

Dutch Iris 'Professor Blaauw', Fleur de Lis 'Professor Blaauw'


Award-winner Dutch Iris 'Professor Blaauw' features elegant and showy deep violet-blue flowers, about 3-4 inch wide (8-10 cm), with bright yellow central markings on their falls. The flower stalks are sturdy and surrounded by sword-like leaves.

  • This iris was granted the prestigious Award of Garden Merit by the Royal Horticultural Society in 1994.
  • Flowering occurs in late spring to early summer for 2-3 weeks.
  • Generally growing up to 22-26 inches tall (55-65 cm), it makes excellent cut flowers!
  • Easily grown in averagemedium moisturewell-drained soils in full sun. Tolerates some afternoon shade.
  • Lovely in beds and borders. Spectacular when planted in groups (at least 20 bulbs)!
  • Deer and rabbit resistant
  • To plant in fall or spring
  • Ingestion may cause discomfort.

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Requirements

Hardiness 6 – 9
Heat Zones 1 – 9
Climate Zones 2B, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
Plant Type Bulbs
Plant Family Iris Hollandica - Dutch Irises
Exposure Full Sun
Season of Interest Spring (Late)
Summer (Early)
Height 1' – 2' (30cm – 60cm)
Spread 2" – 3" (5cm – 7cm)
Spacing 3" (7cm)
Depth 5" (12cm)
Water Needs Average
Maintenance Low
Soil Type Clay, Loam
Soil pH Acid
Soil Drainage Moist but Well-Drained, Well-Drained
Characteristics Cut Flowers, Plant of Merit, Showy
Tolerance Deer, Rabbit
Garden Uses Beds and Borders, Wall-Side Borders
Garden Styles City and Courtyard, Coastal Garden, Informal and Cottage, Traditional Garden

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While every effort has been made to describe these plants accurately, please keep in mind that height, bloom time, and color may differ in various climates. The description of these plants has been written based on numerous outside resources.


Requirements

Hardiness 6 – 9
Heat Zones 1 – 9
Climate Zones 2B, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
Plant Type Bulbs
Plant Family Iris Hollandica - Dutch Irises
Exposure Full Sun
Season of Interest Spring (Late)
Summer (Early)
Height 1' – 2' (30cm – 60cm)
Spread 2" – 3" (5cm – 7cm)
Spacing 3" (7cm)
Depth 5" (12cm)
Water Needs Average
Maintenance Low
Soil Type Clay, Loam
Soil pH Acid
Soil Drainage Moist but Well-Drained, Well-Drained
Characteristics Cut Flowers, Plant of Merit, Showy
Tolerance Deer, Rabbit
Garden Uses Beds and Borders, Wall-Side Borders
Garden Styles City and Courtyard, Coastal Garden, Informal and Cottage, Traditional Garden

Great Plant Combination Ideas with Iris Hollandica - Dutch Irises

Guides with Iris Hollandica - Dutch Irises

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