The Fritillaria Imperialis, known as Crown Imperial, requires quite different growing conditions, the exact opposite of the Snake's Head Fritillary. F. Imperialis will not tolerate damp conditions, it likes much drier growing conditions with well-drained soil. If planted in a poorly drained soil, Fritillaria Imperialis is prone to rotting. Dry, well-drained soil is essential which may make them more difficult to grow in clay soil, although this can be overcome by growing them in containers. Also, The Crown Imperial requires sun to thrive and is not shade tolerant.
The bulbs are best planted in September/October and planted deeply about 30 cms and spaced out to a similar distance as the plants become quite large as they mature. The Crown Imperial is spring flowering and its flower colours are yellow, red and orange. It is easy to grow and requires no real maintenance. The only drawback to growing F. Imperialis is that although it looks very stylish and statuesque, its smell is not great, (some say quite bad!).
Fritillaria Imperialis will produce seed, but it takes a long time, several years, to mature into a bulb, which means it may be better to dead head to divert the plant's energy into next year's bulb.