Allium Species, Golden Garlic, Lily Leek

Mine are in clay soil and they bloom very well, though for only a couple of weeks. Mine do not multiply very fast either and I grow mine...Read More in full sun. They get 8" tall. I have had mine for 5 or 6 years.
None of my Alliums have ever self sown.

I have planted these in both shade and sun and they produce little in the way of flowers. But they produce lots of new little bulbs!
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This is the yellow component of the "Mountain Bells Mix" as sold by Breck's.

Performs well in Rawdon, Quebec.

Easily grown in average, medium wet, well-drained soil in full sun to part shade. Best in full sun, but appreciates some light afternoon ...Read Moreshade in hot summer climates. Tolerates a wide range of soils. Best in rich, sandy loams. Plant bulbs in fall. Plants will naturalize by both offsets and self-seeding, and a modest planting of bulbs can colonize an area rather quickly in optimum growing conditions. Not considered invasive however. Deadhead flowers before seed sets to help control any unwanted spread.