Should I soak the bean seeds overnight before planting? I have Fava, Bush Bean Gold Crop, Dragon Langerie Bush and Vermont Cranberry to plant. I think I have heard you should soak some before planting hard seeds.
Yes, you can soak the bean seeds overnight prior to planting them.
What is the best way to store fava bean seeds and how long can they be used?
You can let the seeds dry in the pod, then bring them indoors to finish drying. Properly dried, they can be stored in closed jars for up to 4 years. This article has more information: https://www.gardeningknowhow.com/edible/vegetables/beans/harvesting-bean-seeds.htm
Can Stargazer lily's be planted in the Fava Bean area?
I do not recommend this, as it is reported that some Asiatic lilies can emit poisons into the soil. Any legume such as beans will store this, and distribute it throughout the plant. It is uncertain whether this can contain enough to harm someone, but that is a rick best left untaken. I would relocate the lilies, or find a new spot to plant the beans.