What’s the best soil for microgreens? Should you go organic and will standard potting soil do? Will leftover Miracle-gro soil work?
If you want to know more about the best soil for microgreens, you’re in the right place. Today, I’ll provide you with all the information you need to choose the best soil for your situation.
While we like organic the best (since it’s so close to the greens you’ll be eating), you can still make it work with conventionally fertilized soils.
Microgreens need to be washed after harvest anyways!
So without further ado, let’s dive in!
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In a Hurry? Here Are Our Top Picks
Top 5 Soil Mixes for Microgreens
When it comes to growing microgreens, any organic potting soil will do the trick. However, you can easily get overwhelmed by all the options available on the market.
To make the search process easier for you, I’ve compiled a list of the best soil mixes that you can find on the shelves.
Top Pick Organic Soil Mix – Burpee Natural Organic Premium Growing Mix
- Burpee Organic Premium growing mix is enriched with Burpee plant food for vibrant flowers and delicious vegetables and herbs
- Perfect for container and raised bed gardening, this growing mix feeds plants instantly and provides a slow release plant food that feeds for up to 3 months
- Formulated with coconut coir, a sustainable and renewable resource, that helps maintain moisture between watering's for vibrant flowers and delicious vegetables and herbs
- Omri listed for Organic use
- Enriched with Burpee plant food
Kicking off the list with one of the most popular options that many home growers go for. Burpee Organic Growing Mix has everything you need to grow your microgreens efficiently.
The potting mix is offered in 2-quart and 8-quart bags. This allows you to pick the amount that suits you and your backyard garden.
One of the best things about this Burpee Organic growing mix is that it releases the nutrients instantly. However, the release is also controlled, so it can feed the plants for up to 3 months before you need a refill.
In addition to nutrients, Burpee formulated the soil in a way that enhances its water-retaining features. In other words, you won’t have to rewater the plants more often.
The mix will also keep its moisture for longer, which allows for healthier microgreens with vibrant colors. The water-holding abilities come from the coconut coir formulation.
Burpee Organic Growing Mix is suitable for all kinds of containers and raised bed gardening. This means that you won’t find a problem dealing with the container you’re using.
- Listed by OMRI for organic use
- Retains moisture very well
- Feeds the plants for up to 3 months
- Some users complained about sealing issues
Watch this video comparing Burpee to Fox farm then scan below to read more about Fox Farm soils.
Runner Up If Top Not Available – Espoma AP4 4-Quart Organic Potting Mix
- All natural potting mix enhanced with myco-tone for all Potted plants
- Improves moisture retention and reduces drought stress
- Promotes root growth
- For all indoor and outdoor containers
- Potting soil
The second item on the list is also one of the top-selling potting mixes in the U.S. for all the good reasons. It comes at a price that won’t impact your budget, so you’ll be enjoying a high-quality organic without costing you a fortune.
The potting mix is available in 4-quart bags only. Espoma APA organic mix is ideal for growing microgreens whether they’re indoors or outdoors. All that thanks to its formula and consistency that suits all kinds of containers.
Another great highlight of the product is the quality of the soil. Espoma enhances the mix with their proprietary Myco-Tone formula
Myco-Tone is a perfect blend of both ecto and endo mycorrhizae. The blend is also rich with perlite, sphagnum peat moss, and humus. Moreover, the mix is boosted with earthworm casting, kelp, alfalfa, and feather meals for added value.
- Promotes excellent root growth
- Excellent for buyers on a budget
- Enriched with Myco-Tone formula
- Some users complained of the moldy smell
Best Potting Soil – Fox Farm Ocean Forest Potting Soil Organic Mix
If you’re looking for a 100% natural option that comes in large bulk, Fox Farm has got you covered.
The Ocean Forest organic soil mix features one of the finest blends on the market. The soil mix has excellent land fertilizers combined with some of the best ingredients from the sea. These reasons make it ideal for microgreen farming.
The blend has an ideal pH that’s adjusted at 6.3 to 6.8, which is great for growing vibrant microgreens.
Also, it comes with a rich blend of micronutrients that ensure the healthier growth of your plant. The mix allows for perfect aeration, which is also essential for microgreens.
- Available in a 38.5-quart bag
- Excellent value for money
- Has a rich blend of nutrients
- Some users reported punctured bags
Best Conventional Fertilized Soil – Miracle-Gro Expand n Gro Concentrated Planting Mix
- Great substitute for garden soil or potting mix
- Can be used in-ground or in containers (see label for instructions)
- Grows up to 3X bigger plants than native soil and feeds up to 6 months
- Holds up to 50% more water than basic potting soil
- Expands up to 3X when water is added and creates up to 90% more air space in native soil
Miracle-Gro Expand n Gro is one of the popular potting mixes that a lot of growers rely on. Let’s see if the Miracle-Gro lives up to its name!
Unlike regular soil, this one expands when you add water. However, you should know that I’ll take some time until it reaches the maximum size.
The best thing about this soil mix is that you can use it anywhere. It enables you to add it to a container or add it to your backyard ground. This means that you won’t have to worry about how you grow your microgreens.
According to Miracle-Gro, this soil mix can feed the plants for up to 6-months! Not only that, but they claim that it’ll hold up to 50% more water than any regular soil.
- Expansion creates a lot of space for aeration
- Retains a lot more water than regular soil
- You can use it indoors and outdoors
- A bit pricey for the amount
Fox Farm Happy Frog Organic Potting Soil Mix
- ✅Your potted plants deserve the best organic potting soil. Their roots can’t seek out nutrition in the ground, so you have to bring it to them. That’s why Happy Frog Potting Soil is amended with soil that can help improve root efficiency and encourage nutrient uptake.
- ✅Happy Frog Potting Soil is designed for container planting. Whether you’re growing a ficus in the dining room, a geranium on the patio, or a lemon tree on the deck, use our Potting Soil in your containers.
- ✅Nutrient rich, Happy Frog Potting Soil is highly recommended for container gardens. Ready to use right out of the bag and is pH adjusted to allow for maximum nutrient uptake. The benefits of this premium select potting soil are strong plant structure, vigorous vegetative growth, with enhanced fruit and flower production.
- ✅Bundled with Pearsons Protective Gloves
Another Soil mix from Fox Farm, which shows the level of quality they offer in their products. The Happy Frog Organic potting mix has everything your microgreen needs in a soil mix to grow brilliantly.
The soil mix is rich in nutrients that feed your microgreens instantly. This happens thanks to the ideal microbiome that encourages instant nutrient uptake.
It’s ideal for all kinds of soil growing, including all types of containers. Moreover, the pH level is adjusted to allow vegetation and growth right out of the box.
The Happy Frog soil mix comes with 2 Pearsons protective gloves, so you don’t have to worry about buying new ones separately.
- Adjusted pH for instant growth promotion
- Has an excellent blend that promotes healthy microgreens
- Comes with free gloves
- You need to check the bag thoroughly for occasional small holes
Is Soil the Only Growing Medium for Microgreen?
You can grow microgreens on different types of growing media. In fact, some might go as far as growing microgreens hydroponically. You can grow your microgreen on almost all kinds of organic soil.
However, nothing tops growing microgreens in the soil. Although it can be a bit messy, soil planting, in general, is usually more affordable.
Additionally, it’s a more sustainable system in the long run, as you can reutilize the same microgreen soil. Simply make a compost pile and dump all the content inside. The old soil mix will recycle and become ready for a second round!
Having farm animals also makes soil planting a blessing. Animals like chickens and horses can feed on the harvest remains.
The only downside you get from a soil mix is the higher microbial count. According to a study that compares growing microgreens in different growing media, the soil had the best overall performance.
Soil microgreens had a higher yield than textile and synthetic fibers. Also, the soil had a better tendency to hold water and minerals.
Things to Look for When Growing Microgreens in a Soil Medium
Growing microgreens is simple and enjoyable. However, there are still some factors that affect the quality of your yield.
Let’s have a quick look at some of the soil-related factors that you need to keep in mind while growing microgreens.
If you’re going for a potting mix, make sure that you give the package a good round of inspection.
You should check for little holes and tears in the package. Fortunately, most soil makers will accept returns and replace your bag.
Once you open the bag, make sure that it doesn’t have an alarming amount of bugs or molds, especially if you’re going to grow indoors.
As you already know, microgreens don’t require specific soils to grow. Most potting soils have all the organic matter they need to grow.
If you don’t want to water your microgreens so often, make sure that you get a package with good water retention properties.
However, careful not to overflow the soil with water. If it gets too soggy, you might have a mold problem in the future.
Make sure that your soil has enough aeration to allow the roots to breathe. The air cycle is also important to prevent the plant from rotting.
However, better aeration means quicker water drainage, so you have to find a good balance between them.
There you have it. A complete guide with everything you need to know about the best soil for microgreen. You also know all the aspects that make soil suitable for them.
As you can see, there are many options that you can go for in the market. However, if I get to choose one, I’ll pick Fox Farm Happy Frog Organic Potting Soil Mix.
The potting mix has an amazing blend of nutrients that promotes excellent microgreens growth. Additionally, it comes with high-quality Pearson gloves that make it a great investment!
However, if you’re on a budget, Espoma AP4 4-Quart Organic Potting Mix is a great option for you. It lasts for a long time, so you won’t have to change it so often.