Tapertip Onion
Allium
Liliaceae · perennial · introduced
Last updated
Tapertip onion is a bulbous perennial in the Amaryllidaceae family with grass-like foliage and small umbels of flowers on slender stems. Native to western North America, it grows in dry, rocky habitats at various elevations.
Give it full sun and well-drained soil for best performance. Monitor for pest and disease issues, as the genus has 23 known associations documented.
Plant Profile
Size & Form
Height
1 ft
Spread
0-2 ft
Growth Rate
Medium
Site Requirements
Light
Full Sun
Soil Drainage
Moist
Soil pH
4.5-8.5
Water
Moderate
Hardiness
Zones 5a–9b
Ornamental Interest
Bloom Time
may to june
Origin
North America
Watch for this season
Powdery MildewHigh
Active Conidial Spread
RustHigh
Uredinial Stage (Summer)
Downy MildewModerate
Late Spring - Summer Transition
Diseases: Regionally Documented (22)
Fusarium oxysporum Basal Rot Penicillium expansum Blue Mold Rot Botrytis Blight Multiple obligate oomycetes (Peronosporaceae); species ar... Downy Mildew Fusarium Basal Rot Fusarium oxysporum f Fusarium Bulb Rot of Onion and Garlic (Dry Rot) Neck Rot (Gray Mold) Abiotic or Fusarium spp. Punky Bulb Thrips tabaci Purple Blotch Multiple genera (Melampsoridium, Thekopsora, Naohidemyces... Rust Stromatinia cepivora (syn. Sclerotium cepivorum) White Rot Iris yellow spot virus (IYSV) Iris Yellow Spot Chlaropsis thielavioides Black Mold Pectobacterium carotovorum and Enterobacter spp. Bulb Rots (Bacterial Soft Rots, Enterobacter Bulb Decay, Slippery Skin, Sour Skin, and Yeast Soft Rot) Setophoma terrestris (syn. Phoma terrestris) Pink Root Multiple obligate biotrophic fungi (Erysiphales: Erysipha... Powdery Mildew Ustilago spp. Smut Stemphylium vesicarium Stemphylium Leaf Blight and Stalk Rot Twister Ditylenchus dipsaci Nematode, Stem and Bulb Pratylenchus spp. Nematode, Lesion Paratrichodorus renifer Nematode, Stubby-root
Cultivars (6)
'AlliYUM'
AlliYUM!™ Garlic Chives
'Windy City'
Windy City Ornamental Onion
'Millenium'
Ornamental Onion
'Serendipity'
‘Serendipity’ Ornamental Onion
'Nonelbmu' Glitterbug®
Glitterbug® Humble Bumble® Ornamental Chive
'Globemaster'
Data Maturity Structured Multiple sources. Expert review underway.