It is always a good idea tocook and eat a hearty mealprior to venturing out for the day, and to bring enough food along for when the first meal wears off. The best food combination for the largest health pool and a decent stamina pool is Blood Pudding, Lox Meat Pie, and Serpent Stew...
and indeed it is possible to plant them. That said, fans will need to do quite a bit of preparatory work before they are able to plant seeds inValheim, as they must first craft a specific tool. That tool is a Cultivator, and this guide will detail how to make it as well...