How to Grow Microgreens at Home in 7 Days

Growing microgreens at home is one of those projects that sounds more complicated than it actually is. You do not need a greenhouse, special equipment, or a green thumb. You need a tray, some seeds, a growing medium, water, and a light source. That is it. Seven days from now, you can be cutting your own fresh greens in your kitchen.

I am going to walk you through the whole process, step by step.

What Do You Need to Grow Microgreens at Home?

Gather these supplies before you start. Total cost for a first setup runs about 15 to 25 dollars, and most materials are reusable.

• Growing tray — A standard 10x20-inch nursery tray works perfectly. You want a shallow tray, about 1 to 2 inches deep, with drainage holes. You will also need a second tray without holes to sit underneath and catch water.
• Growing medium — Coconut coir is our top recommendation. It is clean, holds moisture well, and is renewable. You can also use a few layers of unbleached paper towels or a hemp grow mat for an even simpler start.
• Seeds — Buy seeds labeled specifically for microgreen or sprouting use. These are untreated (no fungicide coating) and tested for high germination rates. For your first grow, I recommend radish, sunflower, or pea shoots.
• Spray bottle — For misting during the germination phase.
• Light source — A sunny south-facing window works. A basic LED shop light positioned 4 to 6 inches above the tray works better. You do not need an expensive grow light for microgreens.
• Cover or second tray — Something opaque to cover the seeds during the blackout germination period. An inverted tray with a small weight on top is the standard approach.

How Do You Plant and Grow Microgreens Step by Step?

Here is the process broken into clear steps. Total hands-on time across the whole week is about 15 minutes.

Step 1: Prepare the Growing Medium

If using coconut coir, rehydrate it with water until it is moist but not dripping. Spread a layer about three-quarters of an inch deep across your tray, pressing it gently to create a flat, even surface. If using paper towels, lay 4 to 6 sheets flat in the tray and moisten thoroughly.

Step 2: Pre-Soak Seeds (Large Seeds Only)

Sunflower and pea seeds benefit from an 8 to 12 hour soak in room temperature water before planting. This softens the seed coat and speeds germination. Small seeds like radish, broccoli, and arugula do not need soaking — they will stick together and become impossible to spread evenly.

Step 3: Sow the Seeds

Scatter seeds densely and evenly across the surface of the growing medium. Microgreen seeding rates are much heavier than garden planting — you want seeds nearly touching, roughly 10 to 12 seeds per square inch for small seeds like radish or broccoli. For larger seeds like sunflower, aim for a single layer with seeds just touching. Do not bury them. Mist heavily with the spray bottle to press seeds into contact with the medium.

Step 4: Cover for Blackout (Days 1-3)

Place an inverted tray or opaque cover directly on top of the seeds. Set a small weight on top — a book or a jar of water — to apply gentle pressure. This simulates being underground, encourages strong root development, and forces the stems to push upward. Keep the cover on for 2 to 4 days. Mist once daily by lifting the cover, spraying, and replacing it.

Step 5: Uncover and Introduce Light (Days 3-4)

When you lift the cover and see pale yellow shoots reaching 1 to 2 inches tall with cotyledon leaves beginning to open, it is time for light. Remove the cover and place the tray under your light source or in a sunny window. The shoots will be pale or yellow — this is normal. Within 24 to 48 hours of light exposure, they will green up through chlorophyll production. This transformation is dramatic and satisfying.

Step 6: Water from Below (Days 4-7)

Switch from misting to bottom watering. Pour water into the lower tray (the one without holes) and let the growing medium absorb it upward through the drainage holes. This keeps the leaves dry, which reduces the risk of mold and damping-off disease. Water when the medium feels dry to the touch, typically once daily.

Step 7: Harvest (Days 7-10)

When the cotyledon leaves are fully opened and the microgreens stand 2 to 3 inches tall, they are ready. Use clean scissors or a sharp knife and cut the stems just above the surface of the growing medium. Rinse gently if desired, pat dry, and eat immediately or store in a sealed container in the refrigerator for up to a week.

What Is the Day-by-Day Timeline?

Which Varieties Are Best for Beginners?

Start with these four. They are forgiving, fast, and flavorful:

1. Radish — The fastest grower. Ready in 5 to 7 days. Peppery flavor. Almost impossible to fail with. Start here if you have never grown anything before.
2. Sunflower — Nutty and crunchy with a satisfying bite. Takes 8 to 12 days. Soak seeds overnight before planting. Remove the seed hulls after uncovering if they stick to the cotyledons — just brush them off gently.
3. Pea shoots — Sweet, tender, and productive. Takes 8 to 14 days. Soak overnight. Can produce a small second harvest if cut above the lowest leaf.
4. Broccoli — Mild flavor, major nutritional value. Ready in 7 to 10 days. Tiny seeds, so spread them carefully.

What Can Go Wrong? A Troubleshooting Guide

Most microgreen problems come from three sources: too much water, not enough light, or too many seeds. Here is how to diagnose and fix common issues:

White fuzz on the base of stems
This is almost always root hairs, not mold. Root hairs are fine white filaments that extend from the roots seeking moisture — perfectly normal and harmless. Actual mold is cobweb-like, often gray or green, and may have a musty smell. If it is mold, improve air circulation, reduce watering, and make sure your growing medium and trays were clean at planting.

Leggy, stretched-out stems with small leaves
Not enough light. The seedlings are reaching for any available light source, putting energy into stem length instead of leaf development. Move the tray closer to the window or lower your light to 4 to 6 inches above the tray. Give them 12 to 16 hours of light daily.

Seeds not germinating
Check seed freshness — old seeds lose viability. Make sure the medium stays consistently moist (not waterlogged) during the blackout period. Verify your room temperature is between 65 and 75 degrees Fahrenheit. Some seeds, especially sunflower and pea, need pre-soaking to germinate reliably.

Yellow or pale leaves after uncovering
Completely normal. Seedlings grown in darkness lack chlorophyll. Once exposed to light, chloroplasts activate and leaves green up within 24 to 48 hours. If they remain yellow after 3 days under adequate light, the issue may be nutrient deficiency in the growing medium.

Damping off — seedlings collapse at the base
Damping off is caused by fungal pathogens (Pythium, Rhizoctonia, Fusarium) that thrive in wet, stagnant conditions. Prevention is better than treatment: use clean trays, fresh growing medium, good air circulation, and bottom watering instead of misting the leaves once the seeds have germinated. Once damping off starts, it spreads fast — discard the affected tray and start fresh.

Overcrowding and uneven growth
If some areas are dense and others bare, your seeding was uneven. Practice spreading seeds in a single, uniform layer. An old spice shaker works well for small seeds. Overcrowded trays get poor airflow and are more prone to mold.

That covers the basics. Your first tray might not be perfect — mine was not. But the learning curve is short, the turnaround is fast, and by your third or fourth tray you will have the rhythm down. Fifteen minutes of effort, seven days of patience, and you have fresh, nutrient-dense greens growing on your kitchen counter.

Start simple. Start today.