See what Louise del Balzo has done here? Same as before - big balls thrown into a frame with added spot of colour - bold effect no messing. Those 'big balls' are probably of Teucrium interior design design garden design decorating before and after
Place bulbs shoulder to shoulder across the surface of the soil, 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.