After eight years of trying, it appears that I’m finally
learning how to raise captive Nodding Wild Onions, Allium cernuum. It’s a good
thing too, because the last of the wild plants disappeared from Blue Jay
Barrens three years ago. The onions in
this pot represent the offspring of six plants taken from the wild and
relocated into my prairie garden. That
left only a dozen plants growing in their original location, a site that was
too shady for the plants to produce flowers.
You can read about the original relocation by clicking HERE.
The plants in this pot appear to be doing their best to
break through the chicken wire barrier and reclaim their positions as wild
plants. There are more onion flowers
this year than I’ve had in total over the last seven years.
This spring, I took a few young plants from the pot and
relocated them to one of the native plant beds in my vegetable garden. All of those plants have grown
wonderfully. They are currently sharing
the bed with Spider Milkweed, Leavenworthia
uniflora, and Draba cuneifolia. I think the species in that mix should work
well together.
Nodding Wild Onions produce lovely blooms that attract a
wide variety of insects. Here we have a
beetle, a fly and a bunch of ants.
The most common pollinators this year are small green Sweat
Bees.
Butterflies are not frequent visitors of the onion flowers,
but there are sometimes exceptions. This
Olive Hairstreak spent close to five minutes exploring the onion flowers. The Olive Hairstreak spring brood was quite
successful this year. The second brood
is now coming on more strongly than I have seen in many years.
Early onion flowers are already producing seed pods. I should have ample seed to increase my captive
population of plants, as well as scatter some seed out into suitable wild
sites. It’s taken longer than I had
originally thought, but I’m now becoming optimistic that this project could be
successful.
Interesting the popularity of your A. cernuum as food - and perhaps one of the advantages of gardening in a city. In our native plant garden, the nodding onions are left alone and are blooming and spreading well. Our site it on a hillside with heavy soil, but we added 3-6" of sand in one area and that's where the onions do best. http://www.parkdaletorontohort.com/news/2019/6/18/kathys-grove-and-pollinator-garden-commemoration.html
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