Microgreens at Home: Fresh Greens in 7 Days with Minimal Space

You spend money on seedlings, pots, and soil. You deal with bugs in your garden. You wonder if there's a simpler way to get fresh, nutritious greens that don't require a full garden plot.

Microgreens are that simpler way. They're young vegetable greens, harvested at the cotyledon or first true leaf stage, ready in 7-14 days. They grow in a shallow tray with light, no garden required. They're packed with nutrients. And they're cheaper and tastier than you might think.

This guide will teach you how to grow microgreens indoors, year-round, with minimal equipment. You'll learn which varieties work best, the simple steps to get them growing, and how to harvest them properly.

What Are Microgreens?

Microgreens are young vegetable and herb plants, harvested when they're just a few inches tall. They're different from sprouts (which are eaten whole, seeds and all) and different from baby greens (which are harvested later in growth).

Microgreens vs. Sprouts:

• Sprouts are germinated seeds, eaten whole (roots, stems, seeds) in 3-7 days
• Microgreens are grown in soil or medium, harvested above the roots, in 7-14 days
• Baby greens are harvested at a more mature stage, closer to full-size plants

Microgreens vs. Baby Greens:

• Microgreens are harvested earlier (1-3 inches tall)
• Baby greens are harvested later (4+ inches tall)
• Both are nutritious, but microgreens have higher nutrient density

Why microgreens?

• Fast: Ready in 7-14 days, not weeks or months
• Space-efficient: Grow in a single tray on a windowsill or shelf
• Nutrient-dense: Studies show microgreens can have 4-40x more nutrients than mature plants
• Tasty: Intense flavor, great for garnishes and salads
• Year-round: Grow indoors when your garden isn't producing

Equipment You Need

You don't need much to get started. Here's what you actually need:

Essential equipment:

• Shallow trays: 10x20 inch trays with drainage holes (or without, if you're careful with watering)
• Growing medium: Seed starting mix, coconut coir, or a lightweight potting soil
• Seeds: Certified organic vegetable seeds (not treated with fungicides)
• Light: A sunny windowsill or simple grow lights
• Watering can with a fine spray nozzle

Optional but helpful:

• Heat mat: Keeps soil warm for faster germination in cold climates
• Grow lights: LED or fluorescent, especially in winter or dark spaces
• Spray bottle: For gentle watering in the first few days
• Labels: To mark what you planted and when
• Harvesting knife: A sharp knife for clean cuts

You can buy microgreen trays and seed starting mix at most garden centers. Many people start with simple seed starting mix and regular planting trays.

Which Varieties Work Best

Some varieties work better than others for microgreens. Here's what I've found works well.

Best beginners varieties:

• Radish: Spicy, fast-growing, 7-10 days ready
• Broccoli: Mild, nutritious, 7-10 days ready
• Sunflower: Crunchy, nutty, 10-14 days ready (need to remove hulls)
• Pea shoots: Sweet, crunchy, 7-10 days ready
• Arugula: Peppery, 7-10 days ready
• Cilantro: Herby, 10-14 days ready
• Kale: Mild, 10-14 days ready
• Basil: Herby, 10-14 days ready

More challenging varieties:

• Carrots: Slow to germinate, can be finicky
• Cabbage: Can be bitter if overgrown
• Spinach: Can get moldy if overwatered
• Lettuce: Can rot if soil stays too wet

What to avoid:

• Treated seeds: Use certified organic seeds meant for growing
• Old seeds: Seeds lose viability quickly, especially for microgreens
• Large seeds: Need to be planted densely; some varieties don't work well

The Growing Process

Here's the step-by-step process from start to harvest.

Step 1: Soak Your Seeds

For larger seeds (sunflower, pea, beet), soak them in water for 8-12 hours before planting. This speeds germination.

For smaller seeds (radish, broccoli, arugula), you can plant them dry or with a quick rinse.

Soak seeds in a bowl of room-temperature water. Drain and rinse before planting.

Step 2: Prepare Your Trays

Fill your tray with 1-2 inches of seed starting mix. Level the surface and lightly firm it down.

You want the medium moist but not waterlogged. If it's too dry, seeds won't germinate. If it's too wet, you risk mold.

Step 3: Plant Your Seeds

Distribute seeds evenly across the surface. You want dense planting but not overlapping.

Planting density varies by seed:

• Large seeds (sunflower, pea): Plant 1 seed per 1 square inch
• Medium seeds (radish, broccoli): Plant 2-3 seeds per square inch
• Small seeds (arugula, cilantro): Plant 10-20 seeds per square inch

For sunflower specifically: You'll need about 1 ounce of seeds per 10x20 inch tray. For radish specifically: About 1 ounce covers one 10x20 inch tray.

Don't bury the seeds. Most microgreens need light to germinate. Just press them lightly into the surface.

Step 4: Cover and Wait

For the first 2-3 days, cover your tray with another tray or a plastic dome to keep humidity high. This creates a greenhouse effect that speeds germination.

Keep the covered tray in a warm spot (65-75°F is ideal). Check daily for germination.

Step 5: Uncover and Light

Once you see seedlings emerging (usually 2-3 days), uncover the tray and move it to light.

Lighting requirements:

• Windowsill: A south or east-facing window works well
• Grow lights: Place lights 2-4 inches above the seedlings
• Duration: 12-16 hours of light per day

If you use grow lights, set them on a timer to ensure consistent light exposure.

Step 6: Water Daily

Water your microgreens every day. The soil should stay moist but not soggy.

Watering methods:

• Bottom watering: Place tray in a shallow pan of water and let it soak up moisture
• Top watering: Use a fine spray bottle to mist the soil and seedlings
• Dipping: Submerge the tray bottom in water for a few minutes, then drain

Bottom watering is often easiest and reduces mold risk since it doesn't wet the seedlings.

Step 7: Harvest

Harvest when the first true leaves appear (usually 7-14 days after planting).

How to harvest:

1. Check that the seedlings are 1-3 inches tall
2. Use a sharp knife to cut the seedlings just above the soil line
3. Don't pull them (you'll get soil and roots with your harvest)
4. Harvest in the morning for best flavor

You can harvest the entire tray at once, or harvest individual trays as they're ready.

Growing Tips and Troubleshooting

Prevent mold:

• Don't overwater
• Ensure good air circulation
• Don't crowd your seedlings
• Use fresh, organic growing medium
• Bottom water when possible

No germination?

• Seeds may be too old
• Temperature may be too cold
• Seeds may be buried too deep
• Check seed viability with a germination test

Leggy or weak seedlings?

• Not enough light
• Too far from light source
• Planting density too low (competition helps them grow upright)

Bitter or off-flavor?

• Overgrown (harvest earlier)
• Wrong variety (some naturally bitter)
• Watered incorrectly (too much can leach flavor)

Mushy seedlings:

• Overwatered
• Poor drainage
• Soil stayed too wet

Harvest and Storage

Harvested microgreens should be used within a few days for best quality.

Storage:

• Rinse gently if needed
• Pat dry with a towel or use a salad spinner
• Store in a sealed container in the refrigerator
• Use within 3-5 days

Serving ideas:

• Garnish: Add to soups, salads, sandwiches
• Mix: Combine with other greens for a nutrient boost
• Blend: Add to smoothies (mild varieties like broccoli or sunflower)
• Top: Add to eggs, avocado toast, grain bowls
• Eat raw: Just pick and eat straight from the tray

Yield and Cost

One 10x20 inch tray typically yields 8-12 ounces of microgreens. You can sell microgreens for $15-25 per tray at farmers markets, or just grow them for home use.

Cost comparison:

• Homegrown: About $1-3 per tray in seeds and medium
• Store-bought: $8-15 for a small clamshell

Growing your own microgreens is cheaper than buying them, and they taste better.

Common Mistakes to Avoid

Planting too sparsely: Microgreens need to grow close together for best results. Don't leave gaps.

Overwatering: The most common mistake. Keep the soil moist, not soggy.

Not enough light: This leads to leggy, weak seedlings. Provide adequate light immediately after germination.

Planting too deep: Most seeds need light to germinate. Don't bury them.

Waiting too long to harvest: Harvest at the right stage for best flavor and nutrition.

Using treated seeds: Seeds from hardware stores or non-organic sources may be coated with fungicides that prevent germination.

Starting Small

Start with just one variety. Radish or broccoli are forgiving and fast. Once you understand the process, expand to other varieties.

You don't need a lot of space. A single tray fits on a windowsill or shelf. You can grow microgreens year-round, indoors, with minimal equipment.

The payoff is immediate: fresh, nutritious greens in a week or two, at a fraction of the cost of store-bought. And there's something satisfying about growing food in your own home, regardless of the season.

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— C. Steward 🥬