How to Grow & Care for Microgreens

Introduction

Microgreens are young seedlings harvested just after the cotyledon leaves appear (and often right as the first true leaves emerge). They pack concentrated flavor and nutrients, grow fast (often in 7–21 days), and are perfect for small spaces, indoor gardening, or supplemental farm production. 

 

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1. Seed Selection & Safety

• Use untreated, food-grade seeds specifically marketed for microgreens.
  
  

• Avoid nightshade family seeds (tomato, pepper, eggplant) for microgreens, because they contain alkaloids toxic at seedling stage.
  
  

• Check packet for germinability and batch date.
  
  

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2. Tools & Growing Media

• Trays: shallow trays (with drainage) or flats.
  
  

• Growing medium: potting mix, coco coir, peat blend, or fabric mats (hydro mats).
  
  

• Spray bottle or fine misting tool, clean water
  
  

• Lighting: natural sunlight or grow light (LEDs or fluorescent)
  
  

• Knife / scissors for harvest
  
  

• Scale or measuring tools for seed density calculations
  
  

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3. Seeding & Germination

1. If needed, soak larger seeds (peas, sunflower, etc.) for faster, more uniform germination.
   
   

2. Moisten the growing medium before sowing.
   
   

3. Broadcast seeds evenly over the surface — no deep planting (most microgreens seeds stay on surface).
   
   

4. Press seeds lightly into the surface (to ensure contact). Some growers cover with a lightweight lid or tray for the first few days to promote humidity.
   
   

5. Keep in a warm, dark or low-light location for initial germination (1–3 days).
   
   

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4. Light, Water, & Daily Care

• Once germinated, expose to light (natural or grow lights) ~ 8–16 hours per day.
  
  

• Mist or bottom-water to keep the medium moist but not soggy. Overwatering leads to mold / damping off.
  
  

• Good air circulation helps prevent fungal growth. A small fan is optional but beneficial.
  
  

• Monitor for mold or “fuzziness” — distinguish between root hairs vs mold. 

 

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5. Harvesting & Post-Harvest Handling

• Most microgreens are ready when they reach 2–3 inches tall or when first true leaves appear (often 7–14 days depending on variety).
  
  

• Use clean scissors or knife to cut just above the soil line. Do not pull or uproot.
  
  

• Gently rinse (if needed), pat dry, and store in refrigerator (wrapped in damp paper towel or in breathable container).
  
  

• Use quickly — microgreens are most flavorful and nutritious when fresh.

6. Common Challenges & Troubleshooting

7. Best Microgreens to Grow & Uses

• Popular choices: broccoli, kale, radish, mustard, beet, arugula, basil, chard.
  
  

• Uses: garnish, salads, sandwiches, smoothies, soups, stir-fries
  
  

• Nutritional value: much higher in vitamins, minerals, and antioxidants compared to mature plants.