One of my favorite flowers is from the onion family. The leek is mild tasting, the edible parts are the bulb and the leaf. I use leeks primarily in soups, stews, and meat pies, Nutritional Data.
Leeks are easy to grow, I save seeds and save a lot of money. However, it's tricky saving seeds from the leek plant. If you have any other type of onion plant flowering in the garden or another type of leek, they will cross-pollinate. So I usually grow one type of leek and keep my onions in a garden on the opposite side of my two acre property. I start my seeds in a wet towel inside where it isn't too warm or cold. Onions like cool weather 60-65 degrees to germinate. Once the seeds have shown their little tap roots transplant to sterile dirt and set near light. Don't overwater or mold and fungus will set in and then the dreaded white flies....shudders. I start seeds six weeks before the last frost of spring, usually the end of May in Eugene Oregon.