GROWING ARUGULA aka Rocket Roquette Cool-season annual plant Height: 6-12" Width 8-10" The leaves of Arugula provide a spicy zing when added to salads. It will grow a rosette about a foot wide and equally as tall. It's a cut-and-come-again plant. It boasts several health benefits. It is an excellent source of fiber, rich in Vitamins A, C, and K as well as a good source of calcium, iron, magnesium, phosphorus, and potassium. Types: Wild Arugula. Grows up to 2' tall with jagged leaves and a yellow flower. Rocket Salad. A weaker peppery flavor. The plant grows up to 3' tall. It has lobed leaves and a white flower. Starting Seeds of Arugula Seed Depth: 1/8" on the soil surface and tamp down. Seed Spacing: 3-4" Thin to 4-6". Days to Germinate: 7-14 days. Days to Harvest: 3 weeks/baby leaves, 45 days mature. Seed Longevity: