Prepare the garden bed by tilling the soil at least 8 inches down and up to 12 inches. Add phosphorus to the soil and work it in at the rate the packaging indicates. Phosphorus is a crucial mineral for bulb development and blooming.
Plan your bed before you plant. Dig out the area that you will be laying bulbs to a depth of 6 to 8 inches depending upon the type of bulb. Most bulb packages will tell you the exact depth. Tall flowering bulbs need to be planted slightly deeper so they have plenty of soil stability around them to hold up the stems.
Plant 4 to 6 inches apart for large bulbs and 1 to 2 inches for small ones. Place the bulb with the flatter part on the soil and the pointed part up toward the sky. Fill in the area half way and then water until the soil feels wet when you push your index finger all the way into it. Add the remainder of the soil and tamp down. Water again to moisten this top layer.
Plant the bulbs in groups of type or mix up colors. It is easier to care for a single species than to mix them, but a mixed variety of flowers keeps the blooms flowing over a longer period as each species has a different flowering time.
Fertilize the bed after planting by broadcasting 3 lbs. of fertilizer per 100 square feet. Mix it into the top 2 or 3 inches of soil. The bulbs will not need to be fertilized again this season.
Layer 2 inches of mulch over the bed. This will prevent freezing and will gradually leach nutrition into the soil. Protect tender foliage with a slug bait in spring and deadhead spent flowers to keep the mass planting looking impeccable.