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How to Grow Healthy Sunflower Microgreens in 2 Weeks

Sunflower microgreens have the deliciously nutty flavor of raw sunflower seeds with the texture of spinach. Not only is sprouting sunflower seeds easy, but they are ready to harvest and eat in two weeks!

Sunflower microgreens are one of the most underrated sprouts out there in my opinion! If I had it my way, every home would have a container of sunflower sprouts on their counter at all times.

These sprouts are tiny but mighty. They pack a serious nutritious punch while adding flavor and crunch to salads, soups, sandwiches, and dips. Can you tell I love sunflower microgreens?

 

How to Grow Sunflower Microgreens - Sunflower seeds sprouting in a clear plastic container.

 

Supplies You Need to Grow Sunflower Microgreens

These tasty greens are easy to grow in just about any container you can find around the house, such as clear plastic salad-mix boxes. This post shares a detailed set of instructions on how to grow deliciously tasty sunflower microgreens that are healthy and (more importantly) safe to eat.

Sunflower microgreens sprouting up in a plastic salad container.

How to Make a Greenhouse for Microgreens

No fancy equipment is needed to make a growing environment for this high-brow salad trimming. I used a biodegradable plastic salad box as it’s the perfect soil tray and greenhouse. Please make sure it’s food safe by checking the plastic number here before growing in it!

You could also grow your sunflower microgreens in a milk jug cut in half, a cake tray, chicken dome, or whatever you can imagine that would create a mini greenhouse.

Of course, you can use a dome made specifically for growing microgreens like this one. The benefit of the store-bought dome is that it fits a standard seedling tray and has vents to allow humidity to regulate.

Sandwhich with ground beef, tomatoes, and sunflower microgreens.

Use the Best Sunflower Seeds Possible

The better the seed, the better the sprout! Use organic black oil sunflower seeds specifically labeled for sprouting, or grow your own! Many people want to use the ones that are packaged as birdseed, but I strongly recommend not doing that as they are not regulated for human consumption.

I always buy my sprouting seeds from a trusted source that intends them for sprouting to ensure safety. You certainly could use the raw striped sunflower seeds sold as snack foods (as long as they aren’t roasted or salted, and still have shells). I’ve used them before and they work well. Black oil sunflower seeds taste a bit more flavorful, so if you like the striped ones, venture out to try the others someday.

DIY greenhouse for growing sunflower shoots.

Best Soil for Growing Sunflower Microgreens

You don’t need much of it, but choose your soil wisely. I use a sterilized seedling mix because it’s light and clean. Why not just use garden soil, you ask?

  • First, soil gnats! Ugh, those annoying little flies that you JUST CAN NOT CATCH NO MATTER HOW HARD YOU TRY should be enough of a reason, but there are more.
  • Second, the microbes, bacteria, fungi and other goodies in garden soil may be gold for outdoor growing, but those little seeds have all they need to grow into a nice crunchy microgreen without any additional soil nutrition. Plus, some of what is in your soil may not play nice with your sprouts, growing mold and killing them before you get them on your salad.
  • Third, you need soil that will stay moist but not soggy, and the seedling mix is made just for this.

Sunflower microgreens shooting up out of the dirt.

The Difference Between Sprouting and Growing Microgreens

Some people ask if you can grow sunflower microgreens without soil. Whether you use soil or not is the difference between sprouting and growing microgreens. When you are sprouting, you do not need soil. Microgreens, on the other hand, require soil.

I have done both and I much prefer sunflowers as microgreens. I get many more greens and they last longer. Do you see how the sunflowers push through the soil?

It helps to knock off the seed husks. This burst of energy also affects the flavor. Mung beans are like this as well, and to get the best flavor I put weights in my sprouter so the mung beans have to work. But I digress (you can read more about sprouting here).

How to Store Extra Soil

Since this growing project requires so little soil, you may be wondering what to do with the rest of the bag. My first suggestion is to grow more plants! :)

That being said, you can transfer the soil to a large plastic tub with a lid and store it someplace cool and dry. That will keep it sterile and free of those annoying soil gnats that seem to appear when soil is moist.

How to Plant Sunflower Microgreens

As you’ll see, growing sunflower microgreens is very easy.

First of all, add about an inch of clean, indoor soil to the bottom tray and spread sunflower seeds over the top. I generously cover the soil with seeds, not letting any of them overlap.

Cover the seeds with a wee bit of soil—just enough to hold moisture—and put your mini greenhouse in a warm place out of direct sunlight.

Sunflower microgreens growing in a plastic salad container.

How to Water The Sunflower Shoots

Water the soil and keep it moist, but not soggy. You will want to keep some humidity in while the sunflower seeds are breaking open, but remove the lid a few times each day to refresh the air inside.

Once the seedlings start to grow, remove the lid altogether and let them enjoy the fresh air. Water only to moisten the soil. You should be mindful that over-watering can cause rot and fungus growth.

How to Harvest Sunflower Microgreens

The sunflower microgreens are ready to harvest when the mighty seedlings push up the soil and lose their shells. They should have two fat seed leaves, just like the ones in the photo.

If all of the shells don’t come off, I tousle the tops of the seedlings to dislodge them at harvest time, or else I pick them off in the salad spinner when I wash the microgreens.

Sunflower microgreens on a wooden cutting board.

Snip the seedlings at the base and wash in a small salad spinner (I use this one). I generally keep them in the salad spinner after harvest so I can give them a rinse every few days.

I spin them dry and store them right inside the salad spinner in the fridge, as the colander inside promotes good drainage and prevents rot/ mold.

Sunflower microgreens growing in a plastic container.

Once the microgreens are harvested, compost the soil and roots as they will not regrow. To make a new batch, use clean seedling mix and start again.

There may have been some contaminants that have entered the soil from the first batch, plus there will be roots decomposing in the soil that could compromise the new batch.

More Resources:

For more ideas, check out growing sunflower sprouts in photos over 17 days: Sunflower Micro Greens: A Time Lapse Photo Journal.

This is an older post I did on growing sunflower microgreens in a recycled chicken dome and, while the photos are a bit of an embarrassment, the comments are really helpful to read through.

Or check out this post on soilless mung beans and green peas sprouting in a mason jar and in an automatic sprouter.

Comments

  1. Sunflower microgreens contain enzymes as much as 100 times than full-developed greens, which helps you digest way more important vitamins, minerals et cetera. Plus they offer a standout amongst the most adjusted manifestations of plant protein!

    Admirations for the article!

    Reply
  2. Hello Stephanie! Lovely article! I am hoping to try this very soon!! I have a question regarding the soil. How do you store the soil since you are only using a little at a time?

    Reply
    • Hi Ellie, I have so many plants on the go that I always have a use for soil! That being said, you can transfer the soil to a large plastic tub with a lid and store it someplace cool and dry. That will keep it sterile and free of those annoying soil gnats that seem to appear when soil is moist.

      Reply
  3. I am using plastic mushroom punnetts with potting soil. Eight can be fitted in a 10×20 flat.
    A dozen drainage holes are made in the punnett and, once sown, seeds are germinated on a heating pad.
    When a couple of inches tall, they are moved under fluorescent lighting to green up.
    The 10×20 flats used are heavy plastic and hold six or seven punnetts plus an inverted mason jar.
    The mason jar is filled with water, covered lightly with a lid and placed upside down in the flat. The lid is then carefully removed so water can gradually feed the punnetts (for several days, but requiring more as the seedlings increase in size).
    Alan.

    Reply

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