Arugula Seeds - Rocket Arugula (Roquette) seeds 200+ seeds per pack. Arugula is a fast-growing cool season salad or sandwich green of Mediterranean origin. Arugula has a sharp distinctive nutty flavor and is best when picked young. Arugula can be Self-seeding and hardy. 40-45 days. Germinates in 5-7 days Plant 1/4" deep and 1" apart Thin to 1-6" apart Green Thumb Tip: Sow seeds outdoors as soon as soil can be worked and danger of hard frost has passed. For a continuous supply of arugula, sow every three weeks throughout the summer. Best grown in cooler weather. Plant in full sun or partial shade.