They are best grown from seed or bought from specialist nurseries or garden centres. In the fall, sow the seed just below the soil surface in a mixture of peat moss and sandy loam, and leave them to germinate over the winter. Once the seedlings are large enough to handle, thin them or separate out and plant in suitable location. Good sites include shallow soils over rock or the front of a perennial bed. These native onions will even grow well in a pot.
Nodding onions are excellent wild plants for dry interior gardens.
Eventually the bulbs will increase into clumps. Divide them in the late summer and early fall while they are dormant and replant as soon as you can. Once you have them growing they will need very little care. Native peoples of British Columbia enjoyed wild nodding onions greatly. Often they were simply collected and washed in the wild and eaten raw.