From Ground: First, use a garden fork to loosen the soil around the mexican foxglove plant. Do this carefully so as not to damage the roots. Use a shovel or spade to dig around the plant, keeping a safe distance to protect the root ball. Gradually work the shovel under the root ball until you can safely lift out the plant.
From Pot: If the mexican foxglove plant is coming from a pot, water it gently to soften the soil. Then, invert the pot while holding your hand over the plant’s base; soil and roots should slide out into your hand. If the plant seems stuck, tap the edges of the pot to loosen it. Don't yank the plant by the stem; this could cause damage.
From Seedling Tray: If transplanting seedlings of mexican foxglove, first water the tray lightly. Use a spoon or a small tool to carefully lift out each seedling, ensuring that you don’t damage the tender roots.