I'm in the Seattle area trying to get a Camas patch going in an area maybe 50ft square. First year I planted maybe 100 bulbs and they came up, so next year I planted a few hundred more. Still not blue enough for me, so I planted about 400 more this year. I lots of bulbs coming up right now, so hoping it starts looking like a sea of blue 🙂 I was surprised how many bulbs it takes to make an impact, but at 50x50 it would take 2500 bulbs to have one per square foot. I didn't do the math when I started, just kind of experimenting.
No plans to eat them, just trying to add color and diversity to the field (and based on other replies it sounds like they are tricky to use as a food source anyway.)