From Ground: First, moisten the soil around the slender vervain plant by watering it thoroughly. Then, employing your shovel or garden trowel, start to dig up a broad circle around the plant, being mindful to keep the root ball intact. Carefully slide the shovel beneath the root ball, and gently elevate the plant away from its original spot.
From Pot: Initially, water the slender vervain plant in the pot to loosen the roots. Then, cautiously flip the pot upside-down while holding one hand under the plant and over the soil. Oftentimes, the plant should slide out fairly easily. If not, you may need to gently tap the base of the pot. Be gentle to avoid causing stress to the plant.
From Seedling Tray: Moisten the soil in the tray and cautiously separate the seedling using a gardening trowel or even a kitchen spoon. Be very gentle while extracting the slender vervain from the seed tray to prevent damage to its tiny, delicate roots.