Bluebells (scilla) are hardy spring bulbs that are planted in the fall, generally around October. While wintering in the ground, bluebells begin to take root and form new plants using last year's nutrients, which were stored in the bulbs. Various bluebell varieties exist, all of which typically begin to bloom in mid-spring.
Choose a planting site that is in full sun to partial shade. As with most bulbs, bluebells prefer soil that is well draining and rich. Till a couple inches of humus such as compost or peat moss to the top 8 inches of your planting bed.
Bury the bluebell bulbs with the tips facing up. Small bulbs should, such as English bluebells, should be planted 2-3 inches below the soil's surface. Large bulbs, such as Scilla tubergeniana, should be planted 4-5 inches below the surface.
Space multiple bulbs so that smaller varieties are about 3 inches from each other and larger varieties are 4 inches from each other.
Backfill your soil and use your hands to firm down the soil. Water the bulbs well and firm the soil down again to be sure you avoid any air pockets.