Seaberry
When the snow melts and green plants begin to show themselves again around the start of summer, people grab their baskets and head out to pick seaberries. They have to go fast, though. There's a window of only about a month when they've grown large enough to ear but still have their distinctive salty taste.
The sweet and salty berries are a popular snack in early summer. In summer, they're eaten fresh when the saltiness and tangy sweet juice are equally strong. By the time of the harvest season, the small seeds in their centre have fully matured and the saltiness has faded to a mild aftertaste. Most people consider them too sweet at this point, and await the next summer for a new batch of seaberries.
Not all berries are gobbled up in the summer, though. Many of them are dried and stored for the fall and winter. Though they aren't juicy and sweet anymore, they're added to stews and meat pies for a salty punch.