Scientific Name:
Allium fistulosum
Pronunciation:
AL-ee-um fist-you-LOE-sum
Common Name:
green onion, Welsh onion, spring onion, Japanese bunching onion
Family Name:
Amaryllidaceae
Plant Type:
Annual (grown as), Herbaceous perennial
Key ID Features:
Bulbs elongated and only slightly thicker than the stem; leaves alternate, hollow, most 30-60 long x 1-2(-4)cm wide; umbels round-ovoid, 6-8cm wide, florets 50-100, tepals erect, 6-9mm long x 2-3mm wide, yellowish-white, Apr-Aug, peduncles 50-90cm long, tappering to apex, and also hollow (fistulosum means hollow).
Habit:
Upright
Form:
Vase
Texture:
Coarse
Mature Height:
0.4 - 0.7m
Mature Spread:
0.1 - 0.3m
Growth Rate:
Fast
Origin:
S.E. Asia / Japan / China (China)
Hardiness Rating:
Zone 5: (-29 to -23 °C)
Exposure:
Full sun
Soil/Growing Medium:
Well-drained
Landscape Uses:
Attract beneficial insects, Herb, Urban agriculture
Additional Info:
Leaf Morphology:
Form:
Simple
Arrangement:
Alternate
Texture/Venation:
Soft flexible, Parallel venation
Surfaces:
Glabrous, Glaucous
Colour in Summer:
Bluish, Green
Shapes:
Linear
Apices:
Acute
Bases:
Sheathing
Margins:
Entire
Inflorescence Type:
Umbel
Flower Morphology:
Flowers perfect
Number Of Petals:
3
Corolla Shape:
Rotate/stellate
Ovary Position:
Superior
Colour (petals):
Showy, White (yellow anthers)
Flower Time at Peak:
Apr, May, Jun, Jul, Aug
Additional Info:
6 tepals
Fruit Type:
Capsule
Fruit Colour:
Brown (black seeds)
Fruiting Time:
Jul, Aug
Additional Info:
Not showy
Bark or Stem Colour:
Green
Organ Modifications:
roots seem to just appear at base of stem without a bulb forming
Propagation:
Seed, Division - below ground parts
Maintenance:
Medium
Other:
dead head to prevent seed spread and remove leaves with rust and distroy
Pest Susceptibility:
Diptera - true flies, Fungal leaf spot, Mildew, Root rot, Rust, Thrips (Pest resistant, Disease resistant, Deer resistant, Rabbit resistant)
Specific Pests:
