Place bulbs shoulder to shoulder across the surface of the soil, leaving no space between them. Then top off with more potting soil so the bulbs are just slightly below the surface. Water each container thoroughly, and finish with a layer of mulch.
82 Creative Container Gardens: Pansies, Violas, Panolas, Grass, & Ivy - Southern Living Grass grows so easily. would be pretty in multi-layered pots. Chives would give the same look in an herb garden. Annuals mixed in with herbs might be pretty.