Onion

Onion Seeds

Onion seeds, when sprouted, produce small, crunchy onion sprouts that have a mild, fresh onion flavor. These sprouts are popular in salads, sandwiches, and garnishes. Onion sprouts are rich in nutrients and add a crisp texture and sharp taste to dishes.

History of the Seed

Onions have been cultivated for thousands of years, originating in Central Asia or Iran-Pakistan region. Onion seeds have been used traditionally not only for growing mature onions but also for sprouting to enjoy their fresh flavor and nutritional benefits. Sprouting onion seeds is a more recent practice gaining popularity with health-conscious consumers.

Nutritional Information

Onion sprouts are low in calories and fat but packed with vitamins and minerals. Per 100 grams, onion sprouts typically contain:

  • Calories: 32 kcal
  • Protein: 2.5 g
  • Carbohydrates: 7 g
  • Fiber: 2 g
  • Vitamin C: 15 mg (25% DV)
  • Vitamin A (from beta-carotene)
  • Potassium, calcium, iron, and antioxidants

Nutrition Benefits

  • Boosts immune system due to vitamin C content
  • Supports heart health with antioxidants and potassium
  • Promotes digestion with fiber
  • Contains anti-inflammatory compounds
  • Provides a natural source of energy with carbohydrates

Sprouting Process and Directions

  1. Preparation: Begin with high-quality onion seeds suitable for sprouting.
  2. Soaking: Place seeds in clean water to soak (see Soak Time).
  3. Rinsing: Drain and rinse seeds thoroughly (see Rinse Time).
  4. Sprouting: Keep seeds moist but not waterlogged in a sprouting jar or tray. Maintain a cool, well-ventilated environment.
  5. Harvest: When sprouts reach desired length (see Harvest Time), rinse and use immediately or store.

Soak Time

Soak onion seeds for approximately 8-12 hours to soften the seed coat and initiate germination.

Rinse Time

Rinse the seeds 2-3 times per day with fresh water to prevent mold and keep them moist.

Growing Time

After soaking, sprout the seeds for about 4-6 days until the shoots are about 1-2 inches long.

Harvest Time

Harvest onion sprouts typically between day 4 and day 7, when they are tender and flavorful.

Yield

From 1 tablespoon of onion seeds, you can expect about 1 cup of fresh onion sprouts after full sprouting.

Days to Sprout

Onion seeds generally take 4 to 6 days to sprout fully under ideal conditions.

Best Growing Methods

  • Sprouting Jar: Use a wide-mouth jar with a mesh lid for easy rinsing and drainage.
  • Sprouting Tray: Use trays with drainage holes to spread seeds evenly.
  • Paper Towel Method: Spread soaked seeds on a damp paper towel inside a container for sprouting.

Keep the environment cool (around 60-70°F / 15-21°C) and avoid direct sunlight during sprouting.

Storage

Once harvested, store onion sprouts in a sealed container in the refrigerator. Use within 3-5 days for best freshness.

Using the Ready Sprouts

  • Add raw to salads, sandwiches, and wraps for crunch and flavor.
  • Garnish soups and cooked dishes after cooking to retain freshness.
  • Mix into dips or spreads for enhanced taste.

Helpful Tips

  • Use non-treated, organic seeds specifically labeled for sprouting.
  • Keep sprouts well-drained to avoid mold growth.
  • Rinse sprouts thoroughly before eating.
  • Avoid using water that is too cold or too warm during rinsing.

Did You Know?

Onion sprouts contain sulfur compounds similar to mature onions that give them their distinctive sharp aroma and flavor. These compounds also have natural antibacterial properties.