From Ground: Initially, water the himalayan birch plant to make the soil damp which will make the removal easier. Using a spade, try to dig a wide circle around the plant, ensuring you're not damaging the root ball. Under the plant, very carefully slide your spade or shovel and lift the plant with an intact root system. If the plant is too large, you may need assistance.
From Pot: Before removing the himalayan birch plant from its pot, water it. Then, turn the pot sideways, hold the plant gently by its base, and try to slide it out. If the plant seems struck, tap the sides and bottom of the pot to loosen it up.
Seedling Tray: Water the tray well prior to transplanting. Using a small tool like a butter knife or spoon, gently lever the soil to ease out the seedlings without damaging their delicate roots.