Then Bur’s sons lifted the level land,
Mithgarth the mighty there they made;
The sun from the south warmed the stones of earth,
And green was the ground with growing leeks.
If you look at this commented book from 1923, the author explained it as
Leeks: the leek was often used as the symbol of fine growth
The German version of the poetic Edda I am reading through, a commented version from 1877, explains that, translated;
- Leek (Allium) is regarded in the Edda as holy herb.
I could not however find anything as to why, and especially since leeks aren't spectacular or extraordinary in any ways I couldn't really leave this small detail alone and wanted to know the source of leeks being 'holy'. I understand why Oak trees, for example, have such an importance in the Edda - they are an amazing building material, they are around everywhere and these cultures are literally built on Oak trees. I would understand medicinal plants, things like elderberries but why leek?
When researching this further, and I am not sure if this is a dead end - Another word for leek is allium. Allium is a lot of things, including wild garlic, onions, chives and many more. Of those, especially wild garlic is a plant that is very famous as a wild and healing plant. I could imagine this. Another thing of research showed btw that leeks were used to revive a horses penis and a gods head