Growing your own salad greens in a small space isn't impossible. In fact, growing arugula—that slightly bitter, slightly spicy, ultra-nutritious leafy green—in a container is fairly easy. As a bonus, arugula flowers, which grow if you don't harvest the greens in time, are both beautiful and edible.
Choosing a Container
Because the roots of arugula are relatively shallow, you don't need a giant or deep container to grow the plant. However, consider planting a fair amount of arugula—once you get a taste for it, you might find you're eating a lot! Therefore, pick a container that's wide. Although you can grow arugula in almost anything, a self-watering container makes the whole task a lot easier.
Planting Arugula Seeds
Like most salad greens, arugula seeds are tiny, so you have to be careful not to plant them too deep. Plant your pot in full sun or, for a longer season, give arugula mid-day shade.
- Fill your garden pot up with potting mix, then gently flatten it out with your hand.
- Distribute the seeds as uniformly as possible onto the potting mix.
- Using your palm, gently pat the seeds onto the soil.
- Cover them lightly with potting soil or put a thin layer of seed starting mix over the seeds, gently patting again.
- Add water carefully, either using a rose attachment or a gentle spray from the hose. You don't want the water pressure or weight of the water to disturb your seeds and drive them too deeply into the soil.
Plant arugula seeds as soon as danger of frost is over, and begin to sow once a week or every two weeks to keep a constant supply. Arugula doesn't love hot weather and gets quite bitter if grown when it's steamy outside.
Keep the soil evenly moist until seedlings emerge, which will take from 7 to 14 days. When the seedlings are about an inch or two tall, thin them so they are 1 to 3 inches apart. These young leaves are some of the most tender. Although you should thin the seedlings, sometimes arugula will grow regardless of whether you leave it crowded.
Your arugula should be full grown and ready to harvest in about three to four weeks. The younger the leaves, the more tender and sweet they will be, so don't wait too long to start picking them.
Once the seedlings are 3 to 4 inches long, you can either pull out the whole plant or thin them out. If you want the plants to continue to grow, you can collect just the leaves by cutting or tearing them off toward the base. Be aware that if you pull out the plants, the dirt can get on the leaves.
Using Arugula Flowers
Arugula flowers are a little sweet and are not as spicy as the leaves. The flowers appear after the leaves have grown to full size and are too bitter to eat, so if you don't harvest your arugula in time, you should see flowers.
Pick the flowers off and eat them or add them to a salad or an open-faced sandwich for a beautiful treat. You can also grow some arugula for the flowers alone.