Can’t tell for sure from the picture, but it looks like wild garlic. Could be wild union. You can usually tell by the smell. They are bulb plants. The safest thing would be to pull them by hand and make sure you get the bulb. Hopefully they don’t come back. You could try spot spraying them with weed killer, but you have to be careful around your other plants, of course. If you haven’t planted yet, you can spray before planting. Scorched earth with long acting weed killer. Wait a week or two then plant. Also not a bad idea to add weed barrier. Hope that helps.