Elderberry is a major part of our etnological history. It is sayd a eldertree is the hearth of family health. Its a Slavic superfood. It has so many uses.
We dry the flowers for tea.
Make all sorts of drinks. Berry and flower/lemon syrup to mix with water for drinking, and a popular drink called šabesa, a sort of a low alcohol elder flower infusion chanpange. Wine from the berrys.
We dip the flowers in pancake batter and fry.
We make marmelade, jelly, dry the berrys for tea…
But caution! The berrys are not edible raw!
As for wild leaks, Pepe, you can plant them on your garden. I know some people with admireable patches of it on their gardens.