(Image from: https://hudsonvalleyseed.com/products/wild-arugula?_pos=1&_psq=wild%20ar&_ss=e&_v=1.0&variant=31281171234861)
Growing Instructions for Wild Arugula:
Direct sow as soon as soil can be worked. If transplanting, do so promptly; seedlings grow quickly and checked growth can cause premature bolting. Harvest when young for fresh use, when slightly older for braising. It can become stressed in mid-summer but loves cool weather and will thrive throughout the rest of the season, making it ideal for succession sowing. Very hard: will grow through winter with the protection of a cold frame or low tunnel.
(from Hudson Valley Seed Company website)