There are Allium species that can be harvested year round in the garden, notably nodding onion / Norw:prærieløk (Allium cernuum) which I’ve blogged about before. In autumn, new shoots of Allium carinatum subsp. pulchellum (keeled garlic / Norw: rosenløk) appear and with the mild weather we’ve been experiencing they’ve already reached about 20 cm high. They are hardy and can survive to at least -20C. It’s now in the autumn that this edimental Allium is most useful. I use the shoots in a similar way to chives (Allium schoenoprasum), which died back some time ago and won’t reappear until spring (unless I force them indoors), in salads, cut and sprinkled on sandwiches, in scrambled egg, quiches etc. I use them from October to April.

There are two colour forms, pink and white which are particularly valuable as they last such a long time and are popular with pollinators:
There are also forms with bulbils which can be a bit invasive:
You’ll see the flowers used as a tasty decoration in my multi-species salads (bottom right in the picture):
Allium carinatum is also popular with pollinators: