How to Grow Broccoli Microgreens – Super Easy

Broccoli microgreens are one of the easiest and quickest microgreens to grow.

Besides that, broccoli microgreens pack a lot of nutrition and health benefits in a small serving size.

Almost every microgreen vendor at farmers' markets carries broccoli microgreens. One of the reasons is that they're one of the most well-known microgreens among consumers.

There are many good reasons for the broccoli microgreen's popularity. For foodies and chefs, broccoli microgreens add freshness, a crunchy texture, and a much less bitter broccoli flavor (than mature broccoli) to food. 

For the home grower, broccoli microgreens are the easiest microgreens to grow. Follow a few easy steps, and you'll be eating broccoli microgreens within a week.

This article will outline those steps and discuss broccoli microgreens' nutritional value.

harvested broccoli microgreens

Advantages to Broccoli Microgreens

Broccoli is a very commonly bought vegetable in grocery stores. Most vegetable departments stock heads of broccoli right as you walk into the department.

However, broccoli is also one of the most hated vegetables, especially for kids.

Young taste buds find broccoli to be very bitter, and let's face it, the smell of cooked broccoli isn't that appealing either.

That's too bad because broccoli is loaded with nutrition.

But broccoli microgreens are much sweeter and have little to no smell because you don't need to cook or steam the living bejesus out of them to make them tender.

Plus, studies (I'll outline these in a post and link it here when published - or you can join the update list and be notified when new articles are published - plus get a free guide!) have concluded the following about broccoli microgreens (others as well).

"The relatively high nutritional value of broccoli microgreens compared to the vegetable is consistent with previous studies reporting that produce at early growth stages (i.e., sprouts, microgreens, “baby” vegetables) are denser sources of nutrition than their mature counterparts."

~ Weber (2017)

Growing Broccoli Microgreens

Before we get into the nutritional value of broccoli microgreens, let me outline the few necessary steps you'll need to grow them.

If you're more interested in the nutritional information, click this link to skip down to that section.

Also, if you're looking for a broccoli microgreen kit or broccoli seed, click the highlighted links to visit the Home Microgreen Store.

how to grow broccoli microgreens

How to Grow Broccoli Microgreens

Since broccoli microgreens are so easy to grow, they're an excellent variety for first-time growers to sow, raise, and harvest.

The seeds are easy to handle, germinate and grow quickly, are easy to harvest, and provide a ton of flavor and crunchy texture to food. 

Within 8-days of planting the seed, you can eat your homegrown microgreens. Beginning growers will see the whole process happen in about a week, which keeps them interested in growing microgreens.

Keeping interest in growing microgreens high is especially important if you include your kids or grandchildren.

Kids will be more willing to eat what they grow themselves. 

home microgreens free microgreen start guide

Free Quick Microgreen Guide

Follow the recommendations in this guide and you'll be eating microgreens in as few as 7-days!

Growing Microgreens is easy if you follow the simple steps in this colorful 39-page guide.

Ten Easy Steps

Below is a list of the ten steps to growing broccoli microgreens.

For a more detailed explanation and a video of each step, look at the article Growing Microgreens for the First Time.

Here are the steps using the Home Microgreen Kit. If you don't have the kit, the photos will show you what supplies you need to grow microgreens. You can click images to expand their size.

Note: Some of the images below are of the beta Home Microgreens Trays (opaque trays & red lids). The black trays and opaque lids are the new Home Microgreens Trays. Both are similar-sized, but the later use much less soil and are therefore more economical.

Step 1 Getting the Tray Ready

Add a premium potting mix to the planting tray. A planting tray needs small holes in the bottom so water can be drawn up from below instead of top watering once the greens have germinated.

The soil should be firmly compacted and level just below the top of the tray. Please Read this article on why I believe it's better to grow in soil

Even though we had problems growing microgreens on jute mats, broccoli might be one of the microgreens that will grow well on fiber mats. Still, broccoli grown on soil is fool-proof.

how to grow radish microgreens

Step 2 Wet the Soil

Use a spray bottle to wet the soil surface with un-chlorinated water. Allow the water to soak into the soil, then respray the surface. Use your fingers to level the surface if you see depressions or high spots on the soil.

growing radish microgreens spraying the soil

Step 3 How Much Broccoli Seed to Sow?

The variety of broccoli we grow and sell is called Waltham broccoli

Add your broccoli seeds to a shaker bottle. A shaker bottle will allow you to spread the seeds more evenly. There are between 6,000 to 6,500 broccoli seeds in an ounce. That's between 210 and 230 seeds per gram.

For broccoli, you want about 18 seeds per square inch. So if your planting tray surface is 37.5 square inches, you'd add 3.3-grams of Waltham broccoli seeds to your shaker bottle. Below is a photo of 3.3-grams broccoli microgreen seeds, or a little less than a teaspoon.

broccoli seeds

Step 4 Sow the Broccoli Seed

Now that the soil surface is prepared, and the broccoli seeds are in the shaker bottle, it's time to sow them.

Start sprinkling seeds onto the soil in concentric circles around the planting tray. It's helpful to hold your spare hand around the tray so seeds don't bounce out.

Spread the seeds as evenly as possible across the surface. You may need to unscrew the top off the sprinkler bottle to get the last few seeds out of the bottle. Once all the seeds are out of the bottle, use your finger to spread clumps of seeds to areas with fewer seeds.

Don't worry if the seeds aren't perfectly spaced. The seeds will grow, and the plants will spread out to fill the voids.

broccoli microgreen seeds planted

Step 5 Putting the Broccoli Tray in the Weighted Blackout

Now it's time to prepare the broccoli seeds to germinate. Use the spray bottle again and wet the seeds.

Again, go easy so the seeds don't fly off the tray. The water will also help settle the seeds into the soil.

Place the planting tray inside the watering tray. A watering tray does not have holes and will hold water. Use a similar-size tray, like in the Home Microgreen Kit, or use a larger tray.

The next part of this step is called the weighted blackout method. I wrote a detailed article on the weighted blackout method if you want more information on the process than what is listed below. 

Place a cover on the seeds upside down, so the lid makes contact with the seeds and holds them on the soil surface.

If the cover is transparent or opaque, use a tea towel over the tray to keep light off the seeds.

Most microgreens can be left on the soil surface, but they need to be covered to keep light off them while they germinate (we're testing this now to be sure).

You can place a weight on top so the cover doesn't come off. Don't worry; the growing plants are vigorous and will lift the cover and the weight as they grow.

How to put a home microgreens tray lid on seed
pea shoot seeds with weight on them

Step 6 Just Wait - Do Nothing

Don't do anything for 2-days. Just let the seeds germinate and grow. The cover will retain enough moisture for the seeds to grow.

Step 7 Remove Seeds From the Weighted Blackout

On day 2, take a look at the seeds. You'll see that germination has taken place, and the broccoli seedlings are growing!

At this point, you have a decision to make.

If the germination rate looks good and the seedlings have some stems and cotyledon leaves, you can remove the lid and allow the young plants to receive light.

If they're smaller, like the ones below, or there isn't a lot of germination, check the soil surface to see if it is dry. If so, use the spray bottle, wet the surface again, and place the cover back over the tray.

Let the seeds germinate for another day or two before checking on them again.

The broccoli seedlings in the photo below aren't ready to be placed under lights yet. The germination rate is reasonable, but the plants need to grow more.  

how to grow broccoli microgreens

We put the cover back on for one more day in the case above. Below is the same tray on day three.

Broccoli plants 3-days after planting.

The white fibers are root hairs, not fungus. We could have covered these plants one more day, but we didn't.

Step 8 Place the Broccoli Microgreens Under Light

On the third day, we removed the cover and placed the tray under an LED light. If these were slower-growing microgreens, we would've kept them covered. But as you'll see, the broccoli plants grow fast. 

Now that the broccoli microgreens have germinated and started to root and grow, it's time to get them in some light. There's a lot of discussion about what light is best for microgreens. But, of course, giving them as much light as possible is best.

After all, light is where plants get their energy to grow. Give them as much as you can, whether it be sunlight, cheap LED lighting, or a special grow light. Don't fret over it. Just do the best you can with what you have.

If the plants look white or yellowish, don't worry. Once they receive light, they will turn dark green. If the soil surface looks dry, use the spray bottle to wet the surface. But this will be the last time you use the spray bottle.

broccoli microgreens

Step 9 Water and Let Them Grow

Let the broccoli microgreens grow and give them water from the bottom. Here's where the watering tray comes into play. First, memorize how the weight of the dry tray feels.

Judging the weight this way is how you'll know when to water again.

Add water to the watering tray; a quarter of an inch works. Set the planting tray in the water and allow it to absorb the water from below. Watering from the bottom keeps the leaves and stems dry, eliminating the possibility of damping off disease and stopping soil from splashing on the plants.

The first time you water, you may have to add more water because the majority of the soil in the tray is dry. Afterward, you won't need to add as much water.

Every other day, check the tray's weight to see if it needs water. The need will depend on the humidity and amount of air moving across the tray.

growing radish microgreens watering

Step 10 Ready to Harvest Your Broccoli Microgreens

After 8- to 10 days, the broccoli microgreens will be 2 1/2- to 3-inches tall and are ready to harvest.

The broccoli plants in the photo below grew for 8-days.

Harvest broccoli while the leaves are in the cotyledon stage before the first true leaves form.

To harvest, tip the tray about 45 degrees over a cutting board or a large plate and, using stainless steel scissors or a sharp knife cut the microgreens just above the soil surface.

Like I'm doing with the edible chrysanthemum below.

harvesting shungiku microgreens

Try not to disturb the soil. If some soil does spill, it's okay; use your hands to fluff the cut microgreens. The soil particles will fall to the board or plate, where you can wipe them off.

It's always recommended to wash microgreens before using them to ensure no bacteria are on them.

Only cut what you're going to use that day. Then, replace the growing tray under the light and let them grow so more.

If you can't use all of your broccoli microgreens before they grow too tall and leggy, cut them and place them in a zip-lock bag with several small slits cut in the bag. Don't wash the microgreens at this point.

You want them dry, as they will stay fresher longer. Squeeze the air out of the bag and store the microgreens in the refrigerator crisper.

Simple Right?

That's all there is to growing broccoli microgreens. If you have any questions feel free to use the comment section below the article to ask. I'll get right back to you.

tray of broccoli microgreens
home microgreens

Home Microgreens Store

All the supplies and microgreen seeds you need to grow beautiful and nutritious microgreens at home!

Our prices are as competitive as the larger seed sellers. We also have our own soil, microgreen kits, and trays!

Broccoli Microgreen Nutrition & Flavor

Broccoli microgreens have high levels of Vitamin A, C, K, Folate, and the mineral magnesium.

They also contain potassium, iron, phosphorus, calcium, and zinc.

Like the mature vegetable, broccoli microgreens also contain oxidants and sulforaphane, a compound reported to help fight cancer.  

I have published a detailed article on broccoli nutrition, you can visit the article by clicking the button below. 

Broccoli Microgreen Flavor and How to Use Them

Broccoli microgreens add a fresh, crunchy flavor to your foods.

They have a pleasant earthy flavor similar to mature broccoli but not as bitter and strong. To me, they taste a lot like mild cabbage. 

We've used broccoli microgreens in salads, sandwiches, and egg dishes. Put broccoli microgreens on a burger and enjoy a more flavorful, crunchy topping than regular lettuce.

Interested in Growing Broccoli Microgreens?

If you'd like to try growing your own broccoli microgreens at home use the buttons below to take a look at the kit or if you have the supplies, the broccoli microgreen seeds.

Have a Question?

If you have any questions about the information in this post or microgreens, in general, please leave a comment below or reach out to me using the Ask a Question page

Leaving a comment or using the Ask a Question page does not add your email to any mailing or marketing list. 

rbn crn red

Microgreen Kits & Seeds

Grow Microgreens in Your Home!

Shop for Kits, Equipment, and Seed.

Author of this Article is Todd

Todd is the founder of Home Microgreens & the Home Microgreens store. He also writes for several other websites, including MyViewFromTheWoods.com.

His microgreens have appeared in Better Homes & Garden magazine and other websites.
Todd worked at a large farm market, garden & nursery center for 20-years. Somehow he snuck off to become a geologist and professor before coming back to his senses to write & lecture about microgreens and gardening. He will be in the garden, trout stream, or on a mountain trail with his Springer Spaniel Caden when not at the computer.

You May Also Like

Home Microgreens Also Offers the Following

Microgreen eBook

A comprehensive microgreen ebook that details the principals of growing microgreens at home. Several different methods and processes are detailed.

The ebook comes in two versions, one version includes instructions to grow the most commonly grown microgreens. The second includes access the microgreen vault, a database containing more varieties and information with images taken throughout the stages of growth.

Video Courses for the Home Grower

The Home Microgreens Video Course is perfect for the person that wants to grow one or more trays of microgreens for home use. Trays of microgreens also make great gifts! 

The course includes short, easy to follow videos and checklist for each step along the way.

Step-by-step video instructions are included for the most commonly grown microgreen varieties. 

Grow for Profit Course

Do you want to learn how to grow microgreens for profit? Grow microgreens as a side hustle, retirement income, or maybe even as an occupation. 

It's possible to earn a few hundred to thousands of dollars a month. 

The Grow for Profit Video Course shows you what is involved to set up a microgreens business, how to setup your grow area, and instructions on how to grow many different varieties. 

The Home Microgreens Store

The Home Microgreen Store has all the supplies you need to grow microgreens at home. 

We stock complete microgreen kits, trays, professional potting soil, miscellaneous equipment and of course microgreens seeds.

Microgreen kits make great gifts, home school or rainy day projects, and are fun for the whole family.

Instructions are included as well as email support.

Our kit and seed prices are very competitive if not the lowest on the internet.