MICROGREEN ‘Onion’ Seeds
Botanical Name: Allium cepa
Onion microgreens are slow to grow but packed with reward. Their fine green shoots have a mild onion flavour with a touch of sweetness, making them perfect for salads, sandwiches, wraps, and garnishes. These greens are rich in vitamins A, C, and calcium, offering both taste and nutrition in every bite.
- Mild onion flavour with a gentle sweetness.
- Delicate green shoots add flavour and texture to dishes.
- High in vitamins A, C and calcium.
- Slow-growing but easy to manage for home growers.
How to Grow Onion Microgreens
- Sow Rate: 5–7 grams per small punnet-sized tray.
- Pre-Soak: Not required for microgreens.
- Medium: Grows well in soil or hydroponically.
- Ideal Temperature: 18–22°C
- Germination: Takes 10–14 days to sprout.
- Watering: Keep soil moist, but not soggy. Ensure airflow to avoid mould.
Soil Growing Instructions
- Fill a tray with 3–4 cm of organic soil or coir and level it out.
- Sprinkle seeds evenly across the surface and mist lightly with water.
- Cover the tray with another tray to create darkness for germination.
- Place in a well-ventilated area out of direct sun. Keep moist with a mist spray.
Harvest
- Harvest after 14–21 days when shoots are around 5–7 cm tall.
- Use clean scissors to cut just above the soil line.
Sprouting Onion Seeds (Jar or Tray Method)
- Pre-Soak: Soak for 4–6 hours.
- Drain & Rinse: After soaking, rinse seeds and place in a sprouting jar or tray.
- Rinse Frequency: 2–3 times daily to keep seeds fresh and hydrated.
- Light: Keep in low light for first few days. Move to brighter spot once sprouted.
- Temperature: Maintain 18–22°C for best results.
- Harvest: Sprouts are ready in 7–10 days. Harvest when 5–7 cm long.
- Storage: Store in the fridge and use within 5–7 days for freshness.
For a full overview of microgreen growing techniques, download our Microgreen Growing Guide PDF. It includes tips, charts, and troubleshooting advice for every skill level.
