Scientific Name:
Iris
x
hollandica
Pronunciation:
EYE-riss ex hol-AN-dih-kuh
Common Name:
Dutch iris
Family Name:
Iridaceae
Plant Type:
Flowering cut plant, Herbaceous perennial
Key ID Features:
Bulb about 10cm long; plant up to ~60cm tall; leaves basal, linear, 30-60cm long x 1-2cm wide; flowers blue to yellow to white, non-fragrant, open 7-10cm wide, May–Jun.
Habit:
Upright
Form:
Vase
Texture:
Medium - fine
Mature Height:
0.7 - 1.3m
Mature Spread:
0.1 - 0.3m
Growth Rate:
Fast
Origin:
Garden origin (I. xiphium var. praecox from Spain and I. xiphium var. lusitanica from France x I. tingitana from North Africa)
Hardiness Rating:
Zone 5: (-29 to -23 °C)
Exposure:
Full sun, Part sun/part shade
Soil/Growing Medium:
Well-drained
Landscape Uses:
Cut flower or foliage
Additional Info:
Leaf Morphology:
Form:
Simple
Arrangement:
Alternate
Texture/Venation:
Soft flexible, Parallel venation
Surfaces:
Glabrous
Shapes:
Linear
Apices:
Acute
Bases:
Sheathing
Margins:
Entire
Inflorescence Type:
Raceme
Flower Morphology:
Flowers perfect
Number Of Petals:
3
Corolla Shape:
Ligulate
Ovary Position:
Inferior
Colour (petals):
Showy, White, Yellow, Blue, Violet (Some bicolored cvs.)
Flower Time at Peak:
May, Jun
Additional Info:
Petal like sepals or "falls" are 6-9cm long x 2-3cm wide and have a yellow or white blotch near the base and the apex curve dowmwards, petals or "standards" are 5-8cm long x 1-2cm wide
Fruit Type:
Capsule, Aborted (hybrids) or absent
Fruit Colour:
Brown
Fruiting Time:
Jul, Aug
Additional Info:
Fruit insignificant
Bark or Stem Colour:
n/a
Organ Modifications:
Bulbs
Propagation:
Division - below ground parts
Maintenance:
Low
Pest Susceptibility:
Aphids, Crown rot
Specific Pests:
Course(s):
- HORT 1193/1293
Location(s):
- (AGB) Acer Griseum Bed
- (BCE) Boulevard (Circular) Eastend : labyrinth - spring mix
- (CGW) Community Garden West : confirm ID