Dutch iris 'Professor Blaauw' (Iris 'Professor Blaauw')

Dutch iris 'Professor Blaauw'

Dutch iris 'Professor Blaauw' is a cultivar noted for its striking blue-violet blooms that add vibrant color to spring gardens. The flowers are adorned with bold yellow and white markings, providing a sharp contrast. This perennial thrives in sunny spots with well-drained soil, reaching up to 24 inches in height. Its sword-shaped foliage remains attractive even when not in bloom, lending a vertical element to flower beds.

Scientific classification

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Toxic to Pets

Toxicity

30 cm to 60 cm

Plant Height

5 cm to 7 cm

Spread

Winter dormancy, Summer dormancy

Dormancy

Deciduous

Leaf type

0 - 35 ℃

Ideal Temperature

Care Guide for Dutch iris 'Professor Blaauw'

Every week

Water

Full sun

Sunlight

0 - 35 ℃

Ideal Temperature

Water: Different dutch iris 'Professor Blaauw' species have varying water needs; Bearded dutch iris 'Professor Blaauw' requires minimal watering, only when dry, while Siberian dutch iris 'Professor Blaauw' needs consistently moist soil. Most dutch iris 'Professor Blaauw' species do not tolerate standing water; poor drainage can lead to root rot.

Fertilize: Dutch iris 'Professor Blaauw' thrives in humus-rich soil; fertilize in early spring, early fall, and pre-bloom with phosphorus-rich (5-10-5 NPK) or balanced (20-20-20 NPK) fertilizers. Organic options enhance soil health. Water after fertilizing to aid nutrient absorption.

Pruning: Dutch iris 'Professor Blaauw' features vibrant blooms; prune in early to late spring by removing spent flowers and dead foliage for healthy growth. Cut withered stems back to the base without harming new shoots. Timely pruning prevents disease and promotes robust flowering in future growth cycles.

Propagation: Dutch iris 'Professor Blaauw' should not be propagated by seeding due to potential changes in flower characteristics. Instead, propagation occurs through division 2-3 months post-bloom, retaining a 15 cm-long rhizome per piece. Remove old parts and trim leaves to 15 cm, maintaining a spacing of 30 cm (15 cm for dwarfs).

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