Since the goal is to have something in bloom from the first crocus of spring through June Allium and August Oriental lilies, the spot really does have to be empty of other plants to begin with. This can, of course, vary according to the space you are trying to fill. Set soil mixture aside. This will provide good drainage for the bulbs. Now you can start to plant.
Lilies go in the deepest.
You might fit 4-6 or even more in the hole, depending on their size and that of the hole. Step 6 Next plant daffodils and alliums. Basically you try to fit them in around the bulbs below but don't worry too much as they will find their way to the surface around other bulbs planted above them. Step 7-9 Continue with tulips and soil and finally the smallest bulbs that are also the earliest blooming, the Iris reticulata, crocus, etc. Finally cover with the last of the soil for about 2 more inches above the last bulbs.