>>I like allium flowers so much that I have never yet harvested any garlic or onions when I planted them.<<

I just cut the leaves off the garlic chives and regular chives, and they grow right back. Same works with many other alliums.

>>I've got some giant globe alliums in purple and some cerulean ones, smaller.<<

Those sound pretty.

>> They didn't come up at all for a decade and suddenly have decided to revisit the upper world. The color is amazing, but I feel they are very elfish uncertain plants overall.<<

That matches my observations. :D