Green onions (4/10) List item Submitted to "10 Vegetables That Are High In Calcium" Approved by Rex Trulove February 2, 2018, 10:17 pm 75 Views 3 Votes Share Tweet Pin It might be surprising to some people, but green onions are high in calcium. A single green onion has about 8 to 10 mg of calcium. It also only contributes 3 calories to the dietary intake. MoreReport Item navigation Previous submission Next submission View full list Share Tweet Pin Written by Rex Trulove