Tolmie's Onion (Tolmiei)

The Tolmie's Onion (Tolmiei) is generally described as a perennial forb/herb. This is native to the U.S. (United States) has its most active growth period in the spring . The Tolmie's Onion (Tolmiei) has green foliage and inconspicuous red flowers, with a smattering of conspicuous brown fruits or seeds. The greatest bloom is usually observed in the early spring, with fruit and seed production starting in the spring and continuing until summer. Leaves are not retained year to year. The Tolmie's Onion (Tolmiei) has a short life span relative to most other plant species and a rapid growth rate. At maturity, the typical Tolmie's Onion (Tolmiei) will reach up to 1 foot high, with a maximum height at 20 years of 0 inches.

The Tolmie's Onion (Tolmiei) is usually not commercially available except under contract. It can be propagated by bulbs, seed. It has a slow ability to spread through seed production and the seedlings have medium vigor. Note that cold stratification is not required for seed germination and the plant cannot survive exposure to temperatures below -33°F. has high tolerance to drought and restricted water conditions.

Plant Basics
Growth Rate Rapid
General Type Forb/herb
Growth Period Spring
Growth Duration Perennial
Lifespan Short
Plant Nativity Native to U.S.
Commercial Availability Contracting Only
Physical Characteristics
Bloom Period Early Spring
Displays Fall Colors No
Shape/Growth Form Single Crown
Drought Tolerance High
Shade Tolerance Intolerant
Height When Mature 1
Vegetative Spread Slow
Flower Color Red
Flower Conspicuousness Yes
Fruit/Seed Abundance Low
Fruit/Seed Seasonality Spring Summer
Seed Spread Rate Slow
Gardening Characteristics
Propagations (Ways to Grow) Bulbs, Seed
Moisture Requirements Medium
Cold Stratification Required No
Minimum Temperature -33
Soil Depth for Roots 8
Toxic to Nearby Plants No
Toxic to Livestock No
After-Harvest Regrowth Rate Slow
After-Harvest Resprout Ability No
Responds to Coppicing No
Growth Requirements
pH Range 6–8 pH
Precipitation Range 8–8 inches/yr
Planting Density 4800–11000 indiv./acre
Soil Textures Coarse, Fine, Medium
Soil Depth for Roots 8
Minimum Frost-Free Days 120 day(s)
Salinity Tolerance Low
CaCO3 Tolerance Medium
Sustainability & Use
Leaf Retention No
Palatability High
Fire Resistant No
Causes Livestock Bloating None

Source: USDA, NRCS, PLANTS Database,
National Plant Data Center, Baton Rouge, LA 70874-4490 USA