Work the soil in around the bulbs and the roots , leaving no air pockets. Just as soon after your bulbs are planted . . . By watering your plantings you will make sure that good damp soil comes in contact with all the roots and starts them growing. In the spring when the lily shoots emerge, they are very brittle and easily damaged, so it is wise to mark each bulb planted with a little stake . . . and a label for the whole group. There was a time when we were cautioned to plant lilies only in the fall.
Many people believe that fall is still the best time to put in bulbs.
However, with newly perfected storage methods, lily bulbs may be carried through the winter in excellent condition and arrive for planting as crisp and turgid as if freshly dug, but plant early . . . as soon as the ground is workable.