For the NAD category Ice Sheet replaces Sea Ice because of the lack of ancient danger. Please correct me if I am mistaken but the same should apply for Devilstrand Harvest (?) due to the fact that the only available growing method on Sea Ice is hydroponics and quoting from the wiki "The following plants can be grown in hydroponics basins: Cotton plant, Healroot, Hop plant, Potato plant, Psychoid plant, Rice plant, Smokeleaf plant, Strawberry plant". Therefore I dont see a way to actually grow any Devilstrand on Sea Ice.

Thanks for bringing this up madOne, I'd forgotten!

We've discussed this on the discord, but I think it's worth talking about again since we never came to a conclusion. It's technically possible if you go back far enough, but it was removed, mainly because of solar flares being highly likely to ruin Devilstrand with its long growing time. I'm for keeping the game's running scene fresh, so I'd agree with your suggestion.

Have a wonderful day, Archduck

Thanks for the heads-up!