Quick Navigation
Growing Timeline At-a-Glance
Prepare trays & sow
seeds
Stack & weight
(blackout period)
Expose to light
Bottom water
Harvest when ready
| Coriander Microgreens: Key Growing Stats | |
| Seed per 1122 professional tray | 32 grams |
| Seed per Home Professional Tray | 9-10 grams |
| Seed density per cm² | 0.03 grams |
| Pre-soak needed? | No |
| Stack and weight period | 57 days |
| Time to harvest | 15-24 days |
Quick Start Guide
New to growing Daikon Radish microgreens? Here's the simplified process:
- Prepare your trays: Clean your growing containers and fill with moist growing medium (coco coir recommended) up to the rim.
- Sow seeds: Spread seeds evenly across the surface (9g for home trays, 32g for professional trays).
- Stack & cover: Mist generously, then cover with a second tray and add weight. Keep stacked for 5-7 days until germination.
- Expose to light: Once sprouted, remove the weight and top tray, and place in indirect light or under grow lights.
- Water from below: Add water to bottom reservoir tray only when needed. Maintain good airflow and temperature (18-24°C).
- Harvest: Cut just above soil level when 15-24 days old, when they once the first frilly true leave has grown.
Introduction
Growing coriander microgreens at home is a great way to enjoy fresh, nutrient-rich greens while reducing reliance on store-bought produce. With their vibrant green leaves and distinct aromatic flavor, they bring depth and freshness to a variety of dishes. Packed with vitamin E, carotenoids, and essential minerals, coriander microgreens support immune function, eye health, and overall well-being.
Homegrown microgreens eliminate plastic waste, reduce food miles, and ensure ultimate freshness—far better than store-bought greens that lose nutrients in transit. Coriander microgreens are easy to grow, thriving in soil, grow mats, or coco coir, and ready to harvest in just 10–24 days.
Whether you're a beginner or experienced grower, this guide will walk you through how to cultivate high-quality coriander microgreens using the three-tray method for professional results. Our certified organic, pathogen-tested seeds come in 100% compostable, resealable, and plastic-free packaging, making them a great choice for both your health and the environment.
Variety Profile
- Latin Name: Coriandrum Sativum
- Certification: Certified Organic
- Seed Treatment: Untreated and lab-tested for pathogens
- Flavour & Texture: Fresh, citrusy, and slightly peppery flavour, a more concentrated aroma than mature cilantro,
- Growth Rate: Slow (15 -24 days to harvest)
- Difficulty Level: Medium - but the flavour is amazing!
Seed Quality & Sourcing
The success of your microgreen crop begins with high-quality seeds. Here's what to look for:
What Makes Quality Seeds
- High Germination Rate: Look for seeds with at least an 85% germination rate for even growth.
- Pathogen Testing: Lab-tested seeds minimise the risk of contamination and disease.
- Certified Organic: Ensures seeds are grown without synthetic pesticides or fertilisers.
- Suitable Varieties: Choose seeds specifically labelled for microgreen production for best results.
Storage Recommendations
- Store seeds in a cool (10-15°C), dark, and dry place in an airtight container.
- For long-term storage, refrigerate or freeze unopened packets.
- Avoid frequent opening of refrigerated seeds, as condensation can affect viability.
- Most seeds remain viable for 1-2 years when properly stored.
At Grow Sow Greener, our organic coriander split seed microgreen seeds are lab-tested for pathogens, have exceptional germination rates, and come in compostable, plastic-free packaging to support both your growing success and environmental sustainability.
Equipment & Materials
Essential Materials Checklist
- Growing trays (see system options below)
- Growing medium (coco coir recommended)
- Organic Coriander microgreen seeds
- Spray bottle for misting
- Clean water
- Light source (sunny windowsill or LED grow lights)
- Small fan for air circulation (optional but recommended)
- Sharp scissors or knife for harvesting
Tray Systems
We offer two specialised tray systems to suit different growing scales:
Home Professional Tray Set
Perfect for: Home growers and small-scale production
- Design: Three-tray system that fits easily on windowsills and countertops
- Dimensions: 22cm x 17cm x 6cm
- Key feature: 6cm depth helps maintain consistent moisture, making it nearly "bomb-proof" for part-time growers
- Seeding rate: 6 grams per tray
- Materials: BPA-free recycled food-grade PP; heavy-duty injection moulded
- Weight: 104g per tray
- Growing medium: Use 1 × 10cm coco disc with 400ml water or half a 650g coco brick
- Bottom tray capacity: 1200ml
1122 Professional Tray System
Perfect for: Professional growers and urban vertical farming
- Design: Three-tray system designed for commercial production
- Dimensions: 56cm x 28cm x 3cm (22" x 11" x 1 3⁄8")
- Key feature: Designed for repeated use and integration with automated systems
- Seeding rate: 32 grams per tray
- Materials: BPA-free recycled food-grade PP; heavy-duty injection moulded
- Weight: 350g per tray
- Growing medium: Fills perfectly with coco coir or professional growing media
- Tray capacity: 4 trays per standard shelf (122cm x 45cm)
Growing Media
While various media can be used, we recommend coco coir for its consistency, ease of use, and compact storage. It provides an ideal texture for delicate new roots and ensures reliable growth.
- Coco Coir: Our preferred medium - sustainable, lightweight, and retains moisture well
- Seed Starting Compost: Good alternative, but ensure it's sterile and fine-textured
- Grow Mats: Convenient option, though typically more expensive than coco coir
Important: Always choose low EC coco coir that has been properly cleaned to remove excess salt for optimal plant health.
Lighting Options
- Natural Light: A south-facing windowsill can work well for home growers
- LED Grow Lights: Recommended for consistent results, especially in winter months
- Light Positioning: Keep lights 20-30cm above the microgreens
- Duration: 12-16 hours of light daily for optimal growth
Vertical Growing Setup (For Professional Growers)
Choose sturdy, vertical shelving, such as kitchen wire racks, to ensure easy cleaning, optimal airflow, and even light distribution. Make sure each shelf is perfectly level to prevent uneven watering, which can lead to dry spots or waterlogged areas in your microgreen trays.
- Recommended rack: 122cm wide, 45cm deep shelving units with typically 6 adjustable shelves per rack.
- Shelf capacity: 4 trays per shelf (with 1122 System)
-
Lighting: Recommended: Two Barrina LED grow lights per shelf (or two Arize lynk LED for professional setups). Installation: Space lights evenly to cover all trays.
- Spacing and Positioning: Shelves should be evenly spaced for optimal light and airflow. The distance between the LED lights and the microgreens should be around 20–30cm for optimal light penetration and balanced growth.
- Environmental control: Small oscillating fan, temperature 18-24°C, 50% relative humidity. Position warm climate crops such as Basil higher on the racks and don’t be afraid to utilise a heat mat. Colder loving varieties such as red mustards and Red Kales (napus) should be positioned lover in the racks where the environment will be naturally colder.
Step-by-Step Growing Guide
Step 1: Preparing Your Growing Container
- Clean your trays thoroughly to remove any residues from previous grows.
- Set up your three-tray system: bottom reservoir tray, middle growing tray (with holes), and top cover tray.
- Ensure your growing surface is level to avoid dry or waterlogged sections.
Step 2: Preparing the Growing Medium
- Place your compressed coco coir in a large container - it will expand significantly.
- Add lukewarm water (20-30°C) and allow to soak for 15-30 minutes until fully expanded.
- Break up any clumps and fluff the coir to an even, light texture.
- Mix in organic trace minerals or seaweed powder for added nutrition. We prefer "Sea Fert" as its gentle, organic and we dont have to measure or dose it out like a chemical fert which can burn your microgreens.
- Fill your tray (or whatever container your using)to the rim with the prepared medium before sowing your microgreen seeds. This helps with airflow and also efficient harvesting and is really highly recommended. Your compost should be damp but not waterlogged.
Step 3: Sowing the Seeds
- Measure your seeds according to your tray size:
- Home Professional Tray: 9=10g of seeds
- 1122 Professional Tray: 32g of seeds
- Custom containers: aim for 0.03g per cm²
- Evenly distribute the seeds across the soil surface, spacing them about one to two seed lengths apart—similar to poppy seeds sprinkled on a bun.
- Generously mist the seeds with a spray bottle to help them settle into the compost. Spraying directly downward can gently press the seeds into better contact with the growing medium, improving germination and root establishment.
- Note: Denser seeding increases humidity and may increase mould risk without adequate environmental controls (airflow and dehumidifier) It can also produce more stems and smaller leaves (favoured by some commercial growers due to more weight). Sparser seeding produces larger leaves (often preferred by home growers).
Step 4: Assembling the 3 Tray System & Stacking
- Bottom Reservoir Tray: This tray has no holes and provides bottom watering through capillary action. Fill the bottom reservoir tray with water only once your microgreens have germinated and have begun to grow.
- Growing Tray: Place the growing tray (the one with holes and filled with seeds and compost) directly into the bottom reservoir tray. Do not add water to the reservoir yet.
-
Top Reservoir Tray: Stack the second (top) reservoir tray over the growing tray. Lay it straight on top of the seeds, the right way up, pushing them into the compost. This top tray serves as a cover, creating a blackout environment that retains humidity and warmth essential for seed germination.
- Applying Weight for an Even Canopy: Add weight on top of the cover tray (canned goods or clean bricks work well) to force roots into the compost and achieve a satisfyingly even height canopy. Dont be afraid of this step, commercial growers use pavers or bricks, your microgreens are stronger than you think!
- Place in a warm location (18-24°C) away from direct sunlight during this germination period.
- Keep stacked and weighted for up to 7 days until the seedlings begin to lift the top tray.
Mist generously until germination; thereafter, water only via the bottom reservoir and only when needed, this keeps your greens dry and healthy whilst providing water to the root system only.
Important: The seeds draw their moisture from the pre-moistened growing medium during this phase. Do not add water to the bottom reservoir until after germination.
Blackout and Stretch
"Blackout and stretch", "dome", "flip the lid"
You will find a lot about this step on youtube and other how to grow blogs and if your growing at home forget it. It overcomplicates things, invites pathogens and keeps you subscribed and confused. Dont bother, move on.
Ive grown commercially and now at home scale for the family, Im a firm believer this is unnecessary, confusing and overcomplicates the simple process of keeping a few plants alive for a week or two. (which in effect is all microgreen growing is).
Its however a great method to increase yields for the commercial farmer - those with proper environmental controls, (airflow, air exchange, managed temperature and a relative humidity of around 55%). If you dont have a dedicated and controlled grow room just leave the lights off an extra day or two if you really want nice long stems…. Keep it simple stupid!!
For our commercial customers… You know the processes and blackout timings per crop tailored to your specific grow rooms environment better than I can guess so wont be commenting on blackout here either.
Step 5: Light Exposure & Growth Management
- Once seedlings have lifted the top tray (around day 5-7), remove the weight and cover.
- Expose your microgreens to bright, indirect light or use LED grow lights. If you prefer a bit more stem (still delicious) leave dark for a few days until they etiolate or stretch.
- Only add water to the bottom reservoir tray to provide moisture via capillary action once you can see roots growing down through the holes in the growing tray.
- Maintain gentle airflow and stable temperatures (18–24°C) to prevent mould and promote growth.
- If growing on a windowsill, rotate the tray daily to prevent leaning.
- Keep temperature between 18-24°C with 50% relative humidity for optimal growth.
Note: The seedlings may appear yellow at first but will quickly green up with exposure to light.
Step 6: Harvesting & Storage
- Harvest Timing: Harvest your now grown coriander microgreens when they reach 15–24 days old, just after they develop their first true leaves. For the best flavour and texture, cut them at the base with sharp scissors or a knife.
- Cutting Technique: Use clean, sharp scissors or a knife to cut just above the soil level. with your other hand keep hold of the canopy and place in your prepared container.
- Post-Harvest Care: Store harvested microgreens in an airtight container in the fridge and avoid excess moisture. Dont immediately wash your microgreens, rather refrigerate first and only wash before consumption, this drastically increases shelf life.
- Properly stored, they should remain fresh for 5-7 days.
Advanced Tips & Best Practices
- Optimise Seeding Density: Experiment with different seeding rates to find your preferred balance between stem and leaf growth.
- Bottom Watering Technique: Only add water to the bottom reservoir when needed—overwatering is a common mistake. Look for signs of dryness like slight wilting before adding more water.
- Light Management: For stockier stems, position lights closer (15-20cm); for longer stems, position lights further away (30-40cm).
- Maintaining Optimal Humidity: Aim for around 50% relative humidity to balance moisture and airflow however this is less critical for home growers.
- Pre-Harvest Practices: For best flavour, avoid watering for 12-24 hours before harvest to concentrate the nutritional content.
- Continuous Growing: Start a new tray every week for a constant supply of fresh coriander microgreens.
- Seasonal Adjustments: In winter, you may need supplemental heating or to position trays in a warmer location to maintain optimal growing temperatures.
Troubleshooting Common Issues
| Problem | Possible Causes | Solutions |
|---|---|---|
| Mould Growth | Excessive moisture, poor air circulation, high humidity |
|
|
Root Hairs vs. Mould (white fuzz confusion) |
Normal root hairs often mistaken for mould |
|
| Uneven Germination | Poor seed distribution, uneven moisture, low-quality seeds |
|
| Leggy, Weak Growth | Insufficient light, incorrect light positioning, overcrowding |
|
| Yellowing Leaves | Overwatering, nutrient deficiency, or normal after blackout |
|
Preventing Common Issues
-
Sanitation: Regularly clean and sanitize all trays, tools, and growing surfaces between each cycle to prevent pathogen build up and ensure a healthy growing environment.
Air Movement: Use a small oscillating fan to improve airflow, which helps strengthen stems, reduce excess moisture, and minimize the risk of mould or fungal growth.
Consistent Monitoring: Inspect your trays daily for signs of uneven growth, dryness, or disease, allowing you to address any issues early and maintain healthy microgreens.
Temperature Control: Maintain stable growing temperatures, avoiding extreme heat or cold, as fluctuations can stress plants, slow growth, and create favorable conditions for pathogens.
Nutritional Profile & Health Benefits
Coriander microgreens are nutritional powerhouses, densely packed with vitamins A, C, E, and K, along with essential minerals like calcium, iron, and phosphorus, plus powerful carotenoids and antioxidants that support immune function, eye health, and overall well-being.
Key Nutrients
-
Vitamins: A, C, E, and K
Minerals: Calcium, iron, phosphorus, and potassium
Other Compounds: Beta-carotene, lutein, zeaxanthin, violaxanthin, and dietary fiber
Health Benefits
-
Eye Health: High levels of lutein, zeaxanthin, and beta-carotene in coriander microgreens help protect vision, reduce the risk of age-related eye diseases, and support overall ocular health.
Antioxidant Protection: Rich in vitamin E and carotenoids, these microgreens combat oxidative stress, reduce inflammation, and help safeguard cellular structures from damage.
Immune Support: Packed with vitamin C and essential phytonutrients, coriander microgreens strengthen immune function and aid in the body’s natural defense against infections.
Heart Health: The presence of potassium and antioxidants supports cardiovascular function by helping regulate blood pressure and reducing inflammation.
Digestive Wellness: With natural dietary fiber and bioactive compounds, coriander microgreens promote healthy digestion and gut microbiome balance.
Detoxification: Coriander microgreens contain compounds that support liver function, aiding the body's natural detoxification processes by helping eliminate heavy metals and toxins.
Nutritional Comparison
Research suggests that microgreens can contain up to 40 times more nutrients than their mature counterparts. Daikon Radish microgreens are particularly notable for their concentrated levels of vitamin C and antioxidants compared to fully grown radishes.
Culinary Uses & Recipe Ideas
Flavour Profile & Complementary Ingredients
Coriander microgreens have a fresh, citrusy, and slightly peppery flavour, similar to mature cilantro but often more concentrated. Their delicate leaves and tender stems provide a light, crisp texture that enhances a variety of dishes. Unlike the mature herbs grassyness, coriander microgreens offer a pleasantly pungent undertone with a subtle sweetness, making them versatile for both raw and cooked applications.
Pairs well with:
- Fresh greens (lettuce, arugula, spinach)
- Citrus fruits (lime, lemon, orange)
- Spicy dishes (curries, salsas, stir-fries)
- Rice and grain bowls (quinoa, couscous, jasmine rice)
- Creamy textures (avocado, yogurt, coconut milk)
- Grilled meats and seafood (chicken, shrimp, fish)
- Aromatic spices (cumin, coriander, garlic, chili)
Serving Suggestions
- Fresh Herb Salad – Toss coriander microgreens with mixed greens, citrus segments, and a light vinaigrette for a refreshing salad.
- Taco Garnish – Sprinkle over tacos, burritos, or nachos for a bright, zesty flavor boost.
- Spiced Grain Bowls – Mix into quinoa or rice bowls with roasted vegetables and a drizzle of tahini or yogurt dressing.
- Egg Dishes – Add to scrambled eggs, omelets, or frittatas for a fresh, herbaceous kick.
- Homemade Salsas & Chutneys – Blend into fresh salsa, guacamole, or chimichurri for extra depth of flavor.
-
Soup & Curry Topping – Use as a final garnish for soups, curries, and stews to enhance aroma and taste.
Featured Recipe: Coriander Microgreen & Spiced Chickpea Wrap
Description:
This flavorful wrap combines the bright, citrusy taste of coriander microgreens with spiced roasted chickpeas, creamy yogurt dressing, and crunchy fresh vegetables. Wrapped in a soft tortilla, it delivers a satisfying mix of textures and bold flavors. Perfect for a quick lunch or light dinner, this dish highlights the versatility of coriander microgreens in everyday meals.
Note: Swap chickpeas for grilled chicken or tofu for added protein.
Handling & Preparation Tips
- Rinse microgreens gently just before use to preserve their freshness.
- Add microgreens at the last moment to maintain their delicate texture and flavor.
- Harvest directly from the growing tray using scissors for the best quality.
- Layer microgreens inside wraps instead of just on top for even flavor distribution.
Frequently Asked Questions
Q: How long does it take to grow coriander microgreens in the UK?
A: They are typically ready for harvest between 15-24 days when grown in soil or coco using our tray systems. Growing time may vary slightly depending on temperature and light conditions.
Q: What seeding rate should I use?
A: For the Home Professional Tray Set, use approximately 9 - 10g per tray. For the 1122 Tray System, use approximately 30 - 35g per tray. For recycled containers, aim for 0.03g per cm².
Q: Which tray system should I choose?
A: It depends on your scale—Home Professional for compact, home use and the 1122 Tray System for professional or urban vertical farming. The Home Professional set is ideal for windowsills and small spaces, while the 1122 system is designed for larger-scale production.
Q: How do I ensure proper moisture without overwatering?
A: Use bottom watering—add water to the bottom reservoir only when needed, and avoid overwatering by monitoring tray weight. Don't water until well after germination has occurred. The growing medium should feel damp but not waterlogged.
Q: What environmental conditions are optimal?
A: Maintain 18-24°C and about 50% relative humidity with proper airflow for optimal growth. These microgreens do well in typical room temperature conditions, making them suitable for home growing.
Q: Do I need special lights to grow microgreens?
A: While a sunny windowsill can work, LED grow lights provide more consistent results, especially during UK winters with limited natural light. They're particularly important for commercial growers seeking consistent yields.
Q: How do I store harvested microgreens?
A: Store unwashed microgreens in an airtight container lined with paper towels in the refrigerator. Wash just before use to maximise shelf life. They typically remain fresh for 5-7 days when properly stored.
Q: Can I reuse the growing medium?
A: We don't recommend reusing the growing medium for microgreens due to the dense root network and potential pathogen buildup. However, used medium makes an excellent addition to garden compost.
Summary
Thank you for choosing to grow your own coriander microgreens and for contributing to a more sustainable, self-sufficient food system. By cultivating fresh, nutrient-rich greens at home, you are reducing food miles, minimizing waste, and ensuring healthier, fresher produce for yourself and those around you. Every small step towards local food production and regenerative growing makes a difference—not just for your own well-being but for the planet and society as a whole. Keep growing, keep experimenting, and enjoy the benefits of fresh, homegrown food!
Next Steps
- Select your organic seeds, tray system and growing media based on your space and needs
- Follow our detailed growing steps for consistent, successful harvests
- Experiment with different culinary uses to enjoy your fresh microgreens
- Try growing other complementary varieties like broccoli or pea shoots
- Share your growing journey and culinary creations with our community
Thank you for following this guide—happy growing, and enjoy the fresh, vibrant flavours of your coriander split seed microgreens!