Super sprouting black onion seeds for onion sprouts has been a recent event in our superfood kitchen. After our rediscovery of broccoli sprouts, we decided to grow a couple jars of just plain onion sprouts instead of mixing them with other sprout seeds.
The results were a very beautiful jar packed with tiny miniature scallions These dainty, long sprouts are so adorable, bursting forth from their tiny black seeds, they are quite the sight to behold.
They are officially my favorite looking sprout! They are also VERY tasty. They have a sweet, nutty onion flavor that is not overpowering, like onion can be, and they don't give you "onion breath", like mature onions do, or make you cry.
I have had the unpleasant experience of eating too many. They were so good I decided to eat half a jar full, which was about 2 1/2 cups of sprouts... basically an onion sprout salad.
They gave me the same hot, acidic effect as eating too many raw onions. So, I now eat them in smaller quantities. But, because they are so flavorful, you really just need a small handful.
Onion sprouts are the micro shoots of an onion plant and do not grow roots like other sprout varieties. Allium is the Latin name for the plant family that includes garlic, leek and onions.
Alliums grow slower than other sprouts, sometimes taking 10-15 days to mature into an edible sprout because of their slow germination process. But be patient, they are worth the wait!
You can sprout onion sprouts as a microgreen or by using the vertical tray sprouting method, but if you are a newbie to sprouting, we recommend the jar sprouting technique. It is just easier.
Tip: Because these sprouts can not be de-hulled, when you let them grow over an inch the black seeds will become more tender.
If you are a serious sprouter, onion sprouts are an essential sprout to include when blending seed mixes.
It just takes a little bit of these black onion seeds to round out the flavor of your favorite sprout salad blends.
You will, however, need to sprout them for about 5 days before adding them to other sprout mixes because they take a little longer to germinate.
(See our sprouting guide page for more info on growing other seed varieties.)
The black onion seeds themselves are very dignified and dark, like all of the Allium seed family.
Sometimes they are hard to find from organic sources. So, just in case you need to buy conventional black onion seed, know that the use of chemicals on these seeds is very minimal.
You just need to make sure they are coming from a non-GMO seed source. Onion seeds can take farmers years to establish, so for this reason they can be somewhat expensive when compared to other super sprouts.
For black onion seed storage, it is good to store them in the freezer if you don't plan to use them within a year or so.
Onion sprouts are very nutritious being high in minerals and vitamins A, B, C, E and are 20% protein.