Sowing: When all danger of frost has passed, direct sow Roquette arugula in full sun or partial shade, 1/4″ deep and 3-6″ apart in rows 10″ apart. For a continuous harvest, plant a new crop every 2-3 weeks until the heat of summer; arugula tastes best when grown as a spring or fall crop, since excess heat causes bitterness in the leaves. For a fall crop, plant Roquette Arugula seeds in late summer. Arugula also grows well as a container plant, or throughout the winter in a greenhouse or cold frame.

Growing: Arugula can tolerate light frost, but if heavy frost comes, provide protection for the plant. Keep the soil moist, and apply a layer of mulch to conserve moisture and discourage weeds. Watch out for aphids and other insect pests.

Harvesting: The first leaves can be harvested about two or three weeks after planting, when they reach 2-3″ long. The smaller leaves have a more tender texture and delicate flavor than the larger leaves, which can be quite peppery and intense in flavor; cut the leaves just above the soil, removing the outer leaves first. By the time the plant develops flowers the leaves may be too bitter to eat, though the flowers are also edible and make an excellent garnish. The harvested leaves quickly lose their freshness and should be used within about 6 days. Before storing them, rinse the leaves thoroughly to remove any sand and dry them well. They can be stored in the refrigerator until ready to use.

If you want the plants to continue to grow, collect just the outer leaves by cutting or tearing them off toward the base, leaving the crown intact. Alternatively, you can cut off all the leaves just above the soil; the plant might regrow if the weather is still mild. If you wait too long to harvest and the plant bolts, eat the flowers but not the leaves. The blooms appear after the leaves have grown to full size and are too bitter to eat. You can pick them off and add them to a salad or sandwich for a peppery bite. Aim to use fresh leaves as soon as possible. They will keep in the refrigerator for up to a week. 

Seed Saving: Watch the developing Roquette Arugula seed pods carefully, since they explode when they are completely mature. Remove the pods as soon as they are brown and nearly dry, and spread them to finish drying in a protected location; keep in mind that they may need to be covered to prevent losing the seed when the pods explode. Remove debris from Roquette Arugula seeds and store them in a cool, dry place for up to four years.