Pallas is a large planet full of vast oceans and islands. Humans have terraformed the planet so the soil and water are fine. The issue I am running into is growing food (there is no livestock, this is a world without meat) with a slow rotation (75 days (24 hour periods) of "day" (as in the sun is up) followed by 75 days (24 hour periods) of "night" (as in darkness/ the sun is no out)). It is orbiting around a red dwarf sun. I've worked through every other aspect (how they'll stay warm/ the climate differences between night and day, Earth and Pallas, et cetera). I just need to know what crops could grow/ how I can feed the humans living on this planet.
So how can I feed the people on a planet with a slow rotation?