I love dill, but it goes slimy pretty quickly. I ran across this recipe for preserving fresh dill on a number of Lithuanian websites. I tried it, and today, my three-week preserved dill is just a tiny bit wilted, but perfectly good in my saltibarsciai for lunch. I don't know how long it will keep, but certainly longer than without this treatment. An accurate scale is essential for this recipe, you cannot measure by volume.