HOW TO GROW
MICROGREENS AT HOME

What You Will Learn

• The 4 Things That Actually Matter3
• Your Starter Gear and What It Costs4
• Pick the Right First Varieties5
• Seeding Density and the Soak6
• The Blackout Phase7
• Moving to Light and Greening Up8
• Watering Without Drowning9
• Harvest and Storage10
• Common Beginner Mistakes11
• From One Tray to a Weekly Rotation12
• Your Next Step13

Your Starter Gear and What It Costs

Picture two beginners. One spends three hundred dollars on a fancy setup, gets overwhelmed, and quits. The other spends about fifty, plants a tray this weekend, and is eating their own greens by next week. Be the second one.

The short list

• Trays. The standard is a 10x20 inch tray. You want one with drainage holes and one solid bottom tray under it for bottom watering. Smaller 10x10 or 5x5 trays are great for a kitchen counter.
• Growing medium. Coco coir or a fine seed-starting mix. A bag does many trays.
• Light. A basic full-spectrum LED shop light. A sunny window can work, but a cheap LED is far more reliable.
• A blackout cover. A second tray flipped on top, or a lid, to give the seeds darkness.
• A spray bottle. For gentle top misting during the dark phase.
• A small kitchen scale. The one tool beginners skip and shouldn't. Weighing seed is how you get repeatable results.

Pick the Right First Varieties

Here is where a lot of beginners quietly sabotage themselves. They get excited and order ten exotic seeds at once. Then three trays struggle, and they decide they are bad at this. They are not. They just started on hard mode.

So let me make this easy. Start with crops that are forgiving, fast, and sell themselves on flavor.

Notice the pattern. Sunflower and pea use big seeds you can actually pick up. Radish is so fast it builds your confidence in days. Broccoli is mild enough that anyone will eat it.

Want exact, variety-specific numbers later? Each of these has its own deep-dive guide in our free full ebook. Master the rhythm here first.

Seeding Density and the Soak

Two questions decide whether your tray comes up thick and even: how much seed, and does it need a soak first? Let's settle both.

How much seed

Seed amount depends on seed size. Big seeds like sunflower and pea need a lot by weight. Tiny seeds like radish and broccoli need only a little. This is exactly why the scale matters.

• Big seeds (sunflower, pea): a generous, single layer covering the surface. Think roughly 100g or more per 10x20.
• Small seeds (radish, broccoli): a light, even dusting. Often only 20g to 40g per 10x20.

The goal is the same either way: seeds touching but not stacked in piles. Too sparse wastes the tray. Too dense traps moisture and invites mold.

Which seeds soak

Here is the simple rule. Big seeds soak. Small seeds do not.

• Soak: sunflower and pea. Eight to twelve hours in clean water wakes them up for faster, more even sprouting.
• Do not soak: radish and broccoli. Tiny seeds turn into a gluey clump when wet. Sow them dry.

The Blackout Phase

This is the step beginners are most tempted to skip, and the one that separates leggy, sad trays from thick, sturdy ones. So stay with me.

After sowing your seed evenly on pre-moistened medium, you put the tray in the dark. Not because the seeds are shy, but because darkness makes them stretch and reach, which builds longer, stronger stems before any leaves open.

Weighted, then unweighted

For bigger seeds like sunflower and pea, add gentle weight on top of the blackout cover. The seeds push up against that resistance and build muscle, giving you the thick stems chefs and shoppers love.

• Weighted blackout: the first couple of days, with a cover and a light weight on top.
• Unweighted blackout: a day or so more, weight removed, cover still on, so the shoots can stand up.
• Tiny seeds (radish, broccoli): usually just a cover, little or no weight needed.

Lift the cover once a day to check moisture and let fresh air in. If the surface looks dry, give it a light misting. Otherwise leave it alone.

By the end of blackout you will see pale, crowded shoots reaching up. That pale color is normal and temporary. Light fixes it next.

Moving to Light and Greening Up

Once the shoots have pushed up and lifted the cover, it is time for the payoff. Uncover the tray and move it under your light.

A basic full-spectrum LED about 6 to 12 inches above the canopy, running 12 to 16 hours a day, is all you need. Within 12 to 24 hours, those pale yellow shoots flush a vibrant green. This is the most satisfying moment in the whole grow, and the one that makes you a microgreen grower for life.

Get the light close enough

Here is the mistake almost every beginner makes: the light is too far away. When greens reach and stretch toward a distant light, you get tall, thin, floppy stems. Drop the light closer. Strong, near light makes short, stocky, sellable greens.

Keep it comfortable

Aim for a normal room temperature, roughly 65 to 75 F, with a little air moving. That comfortable range plus gentle airflow is most of the battle. No grow tent required.

So picture it: a tray of pale shoots in the morning, a tray of bright green greens by the next day. That fast, visible reward is exactly why this hobby sticks.

Watering Without Drowning

If a beginner tray fails, overwatering is almost always the reason. So let me reframe the whole thing for you. Your job is not to keep the tray wet. Your job is to keep it from drying out. Those are very different mindsets.

The two phases

• During blackout: mist lightly from the top only if the surface looks dry. A covered tray holds moisture well, so you usually need very little.
• After uncovering: switch to bottom watering. Pour water into the solid bottom tray, about 1 cm deep, let the medium drink for a few minutes, then pour off whatever is left. Keep the leaves dry.

Why bottom water? Wet leaves sitting in still air are a mold invitation. Watering from below feeds the roots and leaves the canopy dry, exactly where you want the moisture and exactly where you do not.

The lift test

Stop watering on a schedule. Instead, pick up the tray. A watered tray feels noticeably heavy. When it feels light, water it. When it still feels heavy, walk away. Your hands learn this in about three trays.

Soggy, still, warm: that is the mold recipe. Bottom watering plus a little airflow keeps you on the safe side of it.

Harvest and Storage

Most beginner crops are ready somewhere around 7 to 14 days, depending on the variety. Radish is often first, sunflower and pea soon after. The tray is ready when the first leaves, the cotyledons, are open and vibrant green.

How to cut

1. Skip the last watering so the greens are dry.
2. Gather a handful upright and cut straight across with sharp, clean scissors, just above the soil line.
3. Pack into a vented container. A paper towel in the bottom catches condensation and stretches shelf life.
4. Refrigerate right away.

Storage that lasts

Dry greens stored cold can keep a week or more. Wet greens turn to slime fast. So the secret to shelf life is simple: cut them dry, keep them dry, keep them cold.

Here is the moment that hooks people. You cut your first handful, rinse nothing, taste it straight off the tray, and realize it is fresher than anything in the store. That is the whole point.

Common Beginner Mistakes

You will avoid almost every early failure by knowing these in advance. Read them once and you have skipped the painful part of the learning curve.

Overwatering

The number one killer. Soggy trays go moldy and rot. Bottom water, use the lift test, and let the surface dry between waterings.

Skipping the blackout

Greens grown in light from day one come up pale, leggy, and weak. The dark phase is what builds strong stems. Do not skip it.

Light too far away

Tall, floppy, leaning greens almost always mean the light is too high or too weak. Drop it to 6 to 12 inches and run 12 to 16 hours a day.

Sowing too thick

Piling on seed feels productive but traps moisture and breeds mold. Aim for seeds touching, not stacked.

Panicking over white fuzz

Fine white fuzz hugging the roots is usually harmless root hairs, not mold. The test: mist it. Root hairs vanish. Real mold mats down, spreads web-like across the surface, and smells musty. If true mold takes more than a small patch, toss that tray, clean up, and replant.

From One Tray to a Weekly Rotation

So you grew one tray and it worked. Now what? Here is the question that turns a one-time win into a steady supply: what if you never had a week without fresh greens again?

That is what a rotation does. Instead of planting one tray and waiting for it to finish, you stagger your plantings so something is always coming ready.

The simple ladder

• Week 1: plant one tray. Learn the rhythm start to finish.
• Week 2: plant a second tray a few days behind the first. Now you have a stagger.
• Week 3 and on: plant a fresh tray every few days. As you harvest one, the next is already greening up.

Soon you are harvesting every few days from the same little shelf, with almost no extra effort. The work per tray never really changes. You just keep the line moving.