Goumi, Elaeagnus multiflora, makes large dark red berries that are very tart but absolutely delectable.
Goumi is also a nitrogen fixing plant, drought tolerant, and cold hardy.
1 year seedlings, bare root, 6 to 12 inches tall.
photo credit: Tatters ❀ from Brisbane, Australia, CC BY-SA 2.0 <https://creativecommons.org/licenses/by-sa/2.0>, via Wikimedia Commons