So, considerations for this project would include knowledge of pollinators, providing suitable habitat for them, etc. Then you have to know how deep to plant the Calochortus. As we know from studies by Kat Anderson and others, some native geophytes actually benefit from ground disturbance, being dug up and redistributed. Again, I know very little about this particular species. This is one indicator for species that benefit from ground disturbance.
Timing is another issue.
We all know that most bulbs are planted in the fall. The natives dug their bulb fields in summer or fall, but not in spring that I ever read of. Feel free to pass my comments on. I am hoping that Dave T. or others will know of a Calochortus ecologist who can help. Lori 2000 California Native Plant Society.