[noahtallen]

You’re in luck! https://www.croptrust.org/our-work/svalbard-global-seed-vaul...

Though not a deep sea bunker. I imagine there would be trade-offs to that too, like water leaking. Plus, access without submarines could be difficult.

[keithnz]

Important to note that it's a backup of a worldwide system of seed/genetic stores, so if that ever gets wiped out, we'd be able to build another one.

[rdtwo]

Seeds last for a long time. Just keeping them dry will keep a few viable for 5-10 years