From Ground: Initially, water the arugula to dampen the soil. Using your spade or trowel, carefully dig a trench around the plant, ensuring you do not damage the plant's root system. Using a gentle lifting motion, work the tool under the root ball and lift the plant out. Handle the plant carefully to prevent damage.
From Pot: Start by
watering the arugula in the pot. This helps loosening the soil and the plant roots. Invert the pot and gently tap its bottom to remove the plant. If the plant is tightly rooted, you may need to run a knife around the inside edge of the pot to help loosen it.
From Seedling Tray: If your arugula is growing in a seedling tray, water them first. Then push up from the tray's bottom to loosen each cell or compartment. Gently grasp the seedling by its leaves (not the stem) and lift upwards.