Planting arugula is relatively easy, especially if you follow these simple instructions:

1. Choose a sunny location - Arugula prefers plenty of sunlight and well-drained soil. So, pick a spot that receives at least six hours of direct sunlight daily.

2. Soil preparation - Arugula thrives in rich and fertile soil, so consider adding compost to the soil to improve its nutrient composition. Also, ensure that the soil pH is 6.0-7.0 range.

3. Sowing the seeds - Sow arugula seeds directly into the ground approximately ¼ inch deep and 1 inch apart. You can also plant in rows that are spaced 10 to 12 inches apart.

4. Watering - Water the arugula well immediately after planting and continue to keep the soil moist until the seeds germinate (usually within a week). Afterward, water the plants regularly to keep the soil evenly moist.

5. Thinning - After about two weeks, thin the seedlings to 4 to 6 inches apart by cutting the weakest plants down at the soil surface and leaving the stronger ones to grow.

6. Harvesting - Arugula is ready to begin harvesting within four to six weeks from planting. Cut the outer leaves with scissors and leave the central leaves to mature.

Following these instructions, you can enjoy a hearty and healthy crop of arugula that will add flavor and nutrients to your diet.