Hori Hori
Part Knife, Part Trowel
A hori hori is narrow enough to slip a bulb hole between plants you already have, and strong enough to work through firm soil.
The serrated edge saws through roots, twine and mulch bags, while the inch marks on the blade take the guesswork out of planting depth.
The sheath rides on your belt, so it goes with you from bed to bed.