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How to Grow Microgreens: What Every Grower Needs to Know

Microgreens are young vegetable and herb greens harvested just after the first true leaves develop, typically between 7 and 21 days after germination. Despite their small size, research has shown that microgreens can contain up to 40 times the nutrient concentration of their mature counterparts. They are packed with vitamins, minerals, and antioxidants, making them a superfood favorite among health-conscious consumers, chefs, and restaurants.

The Basic Growing Process

Growing microgreens is straightforward once you understand the fundamentals. Start by soaking your seeds for 8 to 12 hours depending on the variety (larger seeds like sunflower and pea benefit most from soaking). Spread the seeds evenly across a moist growing medium in a shallow 10x20 tray. Cover the tray with a weight or dome for a blackout period of 2 to 4 days. This forces the seedlings to push upward and develop strong stems. After blackout, expose the tray to 12 to 16 hours of light daily. Keep the soil consistently moist but never waterlogged. Bottom watering is preferred to avoid mold on the leaf surface. Harvest when the first true leaves appear by cutting just above the soil line with a sharp knife or scissors.

Top 5 Varieties for Beginners and Profit

1. Sunflower, large, hearty, nutty flavor. The best seller at most farmers markets and a customer favorite for salads and sandwiches.
2. Pea Shoots, sweet, crunchy, and high-yielding. One of the most profitable varieties per tray due to fast growth and high customer demand.
3. Radish, grows in as little as 7 days with a bold, peppery kick. Extremely popular with chefs for garnishes and flavor contrast.
4. Broccoli, packed with sulforaphane, a powerful antioxidant. Health-focused customers specifically seek this variety out.
5. Wheatgrass, the classic juice bar staple. Grows fast, yields well, and has a built-in customer base at health food stores and juice bars.

Common Mistakes That Cost Growers Money

The three most costly mistakes for new growers are overwatering (which creates mold and root rot), inconsistent temperature and humidity (which causes uneven growth and crop loss), and harvesting at the wrong time (too early means less yield, too late means lower quality and shorter shelf life). GLAP helps you avoid all three with environmental monitoring, automated alerts, and AI-powered harvest timing that tells you exactly when each tray is ready.