The wild onion is one of those bulb plants like daffodils and tulips, except these onions, grow wild. The wild onion has thin green stalks. On the other end of the green shoots, the wild onion flowers. Wild onions can have small white herbs, blue flowers, or purple flowers. These plants are usually found clumped together. It is not possible to see a wild onion standing alone in the yard.
It depends on what type of wild onion one has and where the onion is when it comes to blooming. In the Bay Area, the three-cornered leek will begin to bloom in January. Alpine onions thrive in middle July. The best time to harvest is in the summertime. Most wild onions will flourish in the summertime, but must not be picked until they have entirely flowered. It is not unusual to find wild onions blooming in September. Before the wild onions bloom, they can look very much like clumps of tall grass. The wild onion can grow in gardens with other flowers.
Wild Onions thrive best in Zones 4-9. This means that the temperature needs to be anywhere from -35 to about 7 degrees Celsius. For those who are not using the metric system, that would be at least -31 Fahrenheit to 44.6 degrees Fahrenheit. These plants prefer colder weather and have been known to grow along the east coast, as far south as the coast of Florida. They have also been seen growing out west in Colorado. During the colder part of the season, many people have seen these wild onions growing in parts of California.
Wild onions prefer to grow in acidic soil that is not too organic. These onions don't care for the alkaline earth. Wild onions need plenty of sunlight to thrive. When these plants reach full height, they can be about 12 inches or 30cm high.