Planting Bulbs at the Perfect Depth Getting your planting depth right is the secret to strong roots and beautiful blooms. Heres how deep to plant your favorite spring bulbs for the best results! Shallow 5 cm deep Crocus Bright early-spring color Snowdrop Delicate white blooms Iris Graceful and elegant Medium 10 cm deep Hyacinth Fragrant and vibrant Muscari Grape Hyacinth Small but striking Tulip The classic garden favorite Deep 1520 cm deep Daffodil Cheerful yellow blossoms Allium Bold and architectural Fritillaria Unique and dramatic Pro Tip: Plant bulbs in layers deepest bulbs at the bottom, smaller ones above for continuous blooms through spring! Perfect depth = perfect garden.