We have talked extensively on how to plant garden bulbs in containers but we saw this idea and thought we would pass it along. Instead of being selective and methodical when planting try this approach.
The key they say is to be generous with your bulbs. For a large mixed pot, plant your bulbs shoulder to shoulder in a smaller plastic nursery pot, and then sink it into a larger container.
The plant the fillers and spillers around it. Remember how tall your bulbs will get. If you have a deep pot, fill some of the space with pine cones or packing peanuts before adding soil. This not only saves on the amount of potting soil you will need, but it also significantly reduces the weight of your container.
Fill the pots with good quality potting soil to within a few inches of the rim. Never use garden soil, top soil, peat humus, or cow manure. These products are too heavy and drain too slowly.
For the best show, plant lots of bulbs. Place the bulbs close 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 such as mini pine bark nuggets. Leave pots outdoors for winter chilling. The more exposure to cold the bulbs get, the better they will bloom.