How to Grow Microgreens at Home: The Complete Beginner's Guide
Share
How to Grow Microgreens at Home: The Complete Beginner's Guide
Microgreens are the fastest, easiest, and most rewarding crop you can grow indoors — no garden, no experience, and no green thumb required. In just 7 to 14 days, you can harvest a fresh, nutrient-dense crop right from your kitchen counter.
Whether you're a foodie, a health enthusiast, or simply someone who wants to grow something green indoors, microgreens are the perfect starting point. They're packed with vitamins, minerals, and antioxidants — and they taste incredible. Ready to get growing? Browse our Seeds Collection at Rooted Treasures Farms to find the perfect microgreen seeds for your first crop.
1. What Are Microgreens?
Microgreens are young vegetable greens harvested just after the first true leaves (cotyledons) have developed — typically 7 to 14 days after germination. They are not sprouts (which are grown in water) and not baby greens (which are older). Microgreens occupy the sweet spot between the two: grown in soil or a growing medium, harvested above the root line, and bursting with concentrated flavor and nutrition.
According to research published in the Journal of Agricultural and Food Chemistry (USDA/University of Maryland), microgreens contain up to 40 times more nutrients by weight than their mature counterparts. That makes them one of the most nutrient-dense foods you can grow at home.
2. Why Grow Microgreens at Home?
- Incredibly fast: Most varieties are ready in 7–14 days — the fastest crop you can grow indoors
- Extremely nutritious: Up to 40x more vitamins and antioxidants than mature vegetables
- No outdoor space needed: A sunny windowsill or grow light is all you need
- Low cost: A single tray costs just a few dollars in seeds and soil
- Year-round growing: No seasons, no weather — grow fresh greens 365 days a year
- Endless variety: Radish, sunflower, pea shoots, basil, broccoli, arugula, and dozens more
- Culinary versatility: Add to salads, sandwiches, smoothies, soups, eggs, and more
3. Best Microgreen Varieties for Beginners
Not all microgreens are created equal. Some are forgiving and fast; others require more attention. Here are the best varieties to start with:
Easiest & Fastest (Ready in 5–7 Days)
- Radish — Spicy, crunchy, and incredibly fast. Perfect first crop.
- Mustard — Peppery flavor; germinates in 24–48 hours
- Arugula — Nutty and slightly bitter; great on pizza and pasta
Mild & Crowd-Pleasing (Ready in 7–10 Days)
- Broccoli — Mild, nutritious, and one of the most popular microgreens
- Kale — Earthy and hearty; packed with vitamins K, C, and A
- Cabbage — Sweet and mild; great for salads and wraps
- Basil — Aromatic and delicious; pairs perfectly with Italian dishes
Showstoppers (Ready in 10–14 Days)
- Sunflower — Thick, crunchy, and nutty; one of the most satisfying to grow and eat
- Pea Shoots — Sweet, tender, and beautiful; great raw or lightly sautéed
- Beet — Stunning deep red color; earthy and sweet
- Amaranth — Vivid magenta; mild flavor and visually stunning on any plate
4. What You Need to Get Started
You don't need much to grow microgreens. Here's your complete starter supply list:
- Seeds: Use untreated, non-GMO microgreen or sprouting seeds. Browse our Seeds Collection for quality options.
- Growing trays: Standard 10×20 inch trays work best. Use one tray with holes (for drainage) nested inside one without holes (to catch water).
- Growing medium: A quality potting mix, coconut coir, or a dedicated microgreen growing mat. Avoid garden soil — it's too dense.
- Light source: A south-facing window with 4–6 hours of direct sun, or a full-spectrum LED grow light.
- Spray bottle: For gentle, even watering during germination.
- A cover or dome: To create darkness and humidity during the germination phase.
- Sharp scissors or a knife: For a clean harvest.
Check out our plant accessories for trays, spray bottles, and growing tools.
5. Step-by-Step Growing Guide
Step 1: Pre-Soak Your Seeds (Optional but Recommended)
Large seeds like sunflower, peas, and beets benefit from soaking in cool water for 8–12 hours before planting. This softens the seed coat and speeds up germination. Small seeds like radish, broccoli, and basil do not need pre-soaking.
Step 2: Prepare Your Tray
Fill your drainage tray with 1–1.5 inches of moist growing medium. Press it down gently to create an even, firm surface. The medium should be damp but not waterlogged — squeeze a handful and only a few drops should come out.
Step 3: Sow Your Seeds
Spread seeds evenly and densely across the surface of the growing medium. For most varieties, aim for a single layer with seeds touching but not piling on top of each other. Gently press seeds into the medium with your hand or a flat board to ensure good contact.
Step 4: Cover and Create Darkness
Place an empty tray on top of your seeded tray to block light and create gentle pressure (which encourages strong root development). Keep covered for 2–4 days during the germination phase. Check daily and mist lightly if the medium looks dry.
Step 5: Uncover and Move to Light
Once seeds have germinated and seedlings are pushing against the cover (usually 2–4 days), remove the cover and move your tray to a bright light source. You'll notice the seedlings are pale yellow — this is normal. Within 24–48 hours of light exposure, they'll green up beautifully through photosynthesis.
Step 6: Water Daily and Watch Them Grow
Water from the bottom by pouring water into the outer tray (without holes) and allowing the growing medium to absorb it from below. This keeps the leaves dry and prevents mold. Water once or twice daily depending on your environment.
Step 7: Harvest!
When your microgreens reach 1–3 inches tall and the first true leaves are just beginning to appear, they're ready to harvest. Use sharp scissors to cut just above the soil line. Harvest the entire tray at once for best freshness.
6. Light Requirements for Microgreens
Light is critical after germination. According to Penn State Extension, seedlings deprived of adequate light will become leggy, pale, and weak. Here's what works best for microgreens:
- Natural sunlight: A south or west-facing window with 4–6 hours of direct sun is ideal. Rotate trays daily for even growth.
- LED grow lights: The most reliable option. Run lights 12–16 hours per day, positioned 2–4 inches above the tray. Full-spectrum LEDs are best.
- Fluorescent lights: Work well as a budget option; keep lights 2–3 inches above the canopy.
7. How to Water Microgreens
Proper watering is the single most important skill in microgreen growing. The University of Maryland Extension emphasizes that overwatering is the leading cause of mold and crop failure in indoor growing.
Bottom Watering (Recommended)
Pour water into the outer tray (without holes) and let the growing medium absorb moisture from below. This keeps the leaf canopy dry, dramatically reducing mold risk. Empty any standing water after 30 minutes.
Top Watering (Germination Phase Only)
During the first 2–3 days before uncovering, use a fine mist spray bottle to lightly mist the surface if it looks dry. Once seedlings are uncovered and growing, switch to bottom watering exclusively.
How Often to Water
- Germination phase (covered): Mist lightly once daily if needed
- Growing phase (uncovered): Bottom water once or twice daily
- Hot/dry environments: Water more frequently; check medium moisture morning and evening
8. When and How to Harvest
Harvesting at the right time makes all the difference in flavor and nutrition. The ideal harvest window is when:
- Microgreens are 1–3 inches tall
- The first set of true leaves is just beginning to emerge (after the seed leaves/cotyledons)
- The color is vibrant and the stems are firm
How to Harvest
- Hold a small bunch of microgreens gently with one hand
- Use sharp, clean scissors to cut just above the soil line
- Work across the tray in rows for efficiency
- Do not wash until ready to use — moisture shortens shelf life
9. Storing Your Microgreens
- Store in an airtight container lined with a dry paper towel
- Keep refrigerated at 35–40°F (2–4°C)
- Do not wash until ready to eat — moisture accelerates spoilage
- Most microgreens stay fresh for 5–7 days when stored properly
- Pea shoots and sunflower microgreens have the longest shelf life; basil is the most delicate
10. Common Problems and How to Fix Them
Mold on the Soil Surface
Cause: Overwatering, poor airflow, or seeds sown too densely. Fix: Switch to bottom watering only, reduce watering frequency, and add a small fan nearby for airflow. A light dusting of cinnamon on the soil surface acts as a natural antifungal.
Leggy, Pale, or Weak Stems
Cause: Insufficient light. Fix: Move to a brighter window or lower your grow light to 2–4 inches above the canopy. Increase light duration to 14–16 hours per day.
Seeds Not Germinating
Cause: Old seeds, too dry, or too cold. Fix: Ensure the growing medium stays consistently moist (not wet) during germination. Keep trays in a warm location (65–75°F). Always use fresh, quality seeds from a trusted source like our Seeds Collection.
Uneven Growth
Cause: Uneven seed distribution or uneven light. Fix: Sow seeds more evenly next time. Rotate trays 180° daily if using a window as your light source.
Damping Off (Stems Collapsing at Soil Level)
Cause: Fungal disease from overwatering and poor airflow. Fix: Improve drainage, reduce watering, and increase airflow. This is difficult to reverse once it starts — prevention is key. For more on managing plant diseases and pests, see the University of Maryland Extension Pest Guide.
11. Microgreens Nutrition Facts
Microgreens aren't just delicious — they're nutritional powerhouses. A landmark study by the USDA and University of Maryland found that microgreens contain significantly higher concentrations of vitamins and carotenoids than their mature plant counterparts:
- Red cabbage microgreens: 6x more vitamin C than mature red cabbage
- Cilantro microgreens: 3x more beta-carotene than mature cilantro
- Garnet amaranth microgreens: 18x more vitamin E than mature amaranth
- Green daikon radish microgreens: 40x more vitamin E and 6x more vitamin C than mature radish
- Broccoli microgreens: Rich in sulforaphane, a powerful antioxidant linked to cancer prevention
- Pea shoots: Excellent source of vitamins A, C, and folate
Adding just a handful of microgreens to your daily meals is one of the easiest ways to dramatically boost your nutrient intake.
🌱 Shop Microgreen Seeds at Rooted Treasures Farms →
12. Frequently Asked Questions About Growing Microgreens
How long does it take to grow microgreens?
Most microgreens are ready to harvest in 7–14 days depending on the variety. Radish and mustard are among the fastest at 5–7 days, while sunflower and peas take 10–14 days.
Do microgreens need sunlight?
Microgreens need bright light — ideally 4–6 hours of direct sunlight or 12–16 hours under a grow light. A south-facing windowsill works well, but a grow light gives the most consistent results year-round.
Can I reuse microgreen trays?
Yes! Rinse trays thoroughly with warm soapy water and allow to dry completely between uses. Most microgreens are harvested once and do not regrow from the same roots — start fresh seeds for each new crop.
What is the easiest microgreen to grow?
Radish, sunflower, and pea shoots are the easiest microgreens for beginners. They germinate quickly, grow vigorously, and are very forgiving of minor mistakes.
How do I store harvested microgreens?
Store harvested microgreens in an airtight container lined with a paper towel in the refrigerator. They stay fresh for 5–7 days. Do not wash until ready to use.
Are microgreens safe for pets?
Most microgreens like sunflower, pea shoots, and basil are safe for pets. However, some varieties like onion and garlic microgreens are toxic to cats and dogs. Always verify before sharing with pets, and check the ASPCA Toxic Plant List for guidance. For pet-safe plants, browse our Pet Friendly Plants collection.
Final Thoughts: Your First Microgreen Harvest Is Just 7 Days Away
Growing microgreens at home is one of the most satisfying, affordable, and nutritious things you can do as a plant lover. With just a tray, some seeds, and a sunny windowsill, you can be harvesting your first crop in under two weeks — and once you start, you won't stop.
At Rooted Treasures Farms, we're passionate about helping you grow beautiful, healthy plants indoors. Whether you're starting with microgreens, exploring our easy-care houseplants, or looking for the perfect plant gift, we have everything you need to grow with confidence.
🔗 More Plant Care Guides from Rooted Treasures Farms
- 🔗 The Only Indoor Plant Care Guide You'll Ever Need
- 🔗 How to Water Houseplants the Right Way
- 🔗 The Best Soil Mix for Indoor Plants
- 🔗 Houseplant Pest Control Guide
- 🔗 Shop All Seeds →
📚 Scientific & Reference Sources:
- USDA / University of Maryland: Nutritional Quality of Microgreens (Journal of Agricultural and Food Chemistry)
- Penn State Extension: Light and Plant Growth
- University of Maryland Extension: Watering Indoor Plants
- University of Maryland Extension: Houseplant Pests
- ASPCA: Toxic and Non-Toxic Plants for Pets
🌱 Enjoyed This Post? Share It!
Know someone who wants to grow their own food but doesn't know where to start? Share this guide — their first harvest is just 7 days away! 🌿✨
📘 Share on Facebook 📌 Save on Pinterest 🗣️ Share on X 💼 Share on LinkedIn 🎵 Follow on TikTok 📷 Follow on Instagram
Growing microgreens and have a question? Drop it in the comments below — we'd love to help you grow your best crop yet!