Does Miracle Gro Potting Mix Contain Fertilizer?

Selecting suitable soil and fertilizer can feel overwhelming with so many options on offer. You have probably heard a lot about Miracle Gro’s potting mix, and now you are wondering if this potting soil contains fertilizer. 

Miracle Gro Potting Mix contains fertilizer that the manufacturers designed to release slowly over time to provide nutrients to your plants. Typically Miracle Gro Potting Mix can sustain your plants for 3-6 months before needing to be refreshed with nutrients such as compost or more potting mix. 

In the rest of this article, I will discuss several important questions about using Miracle Gro Potting Mix in your garden, how much fertilizer this mix contains, and how to use Miracle Gro properly. So, if you want to learn more about this popular potting mix, keep reading. 

What Fertilizer Do They Use in Miracle Gro Potting Mix?

It’s no secret that Miracle Gro helps plants proliferate. So it shouldn’t come as a shock that there is fertilizer in this potting mix. However, you are probably wondering what kind of plant fertilizer works so well.

They use Synthetic fertilizer in Miracle Gro Potting Mix. This synthetic fertilizer releases slowly into the soil once activated with water. The fertilizer will then provide nutrients to the plants for up to 3-6 months before becoming depleted of nutrients. 

Most synthetic fertilizers come from factories that combine nitrogen with hydrogen and methane, creating ammonia. However, each fertilizer’s overall creation process will differ depending on its ingredients. AllThough, manufacturers produce all synthetic fertilizers in factories or laboratories. 

How Much Fertilizer Miracle Grow Potting Mix Contains

Fertilizing plants is essential to reaching optimal plant health and growth. Each potting mix comes with varying levels of nutrients and ingredients. So what exactly does Miracle Gro contain? 

Miracle Gro Potting Mix ingredients:

  • Sphagnum peat moss
  • Aged bark fines
  • Perlite
  • Plant food
  • Wetting agent
  • Coconut husks.

Each of these ingredients helps to provide added nutrients to the soil to feed your plants since there is a good combination of fast and slow-release nutrients. Next, I would like to discuss the exact percentages of essential nutrients in the Miracle Gro Potting Mix. 

Miracle Gro’s Fertilizer Nutrients:

  • 0.21% nitrogen: This nutrient allows your plants to capture more sunlight which they can turn into food to help them grow. 
  • 0.07% phosphorus: Phosphorus aids in taking in sunlight and converting it into usable energy for the plant. 
  • 0.14% potassium: This helpful nutrient increases the movement of water, nutrients, and carbohydrates through the plant’s tissues to speed up growth and promote overall health. 

These nutrients work together to help produce larger, healthier plants which is one of the reasons Miracle Gro is so popular. This excellent potting mix contains almost everything your plants will need and is much simpler to use than your homemade soil if you are new to gardening.

Is Miracle Gro Potting Mix Good for All Plants?

This potting mix is popular among the gardening community, and Miracle Gro is often marketed as a product that you may use on any plant, but is that true? Is Miracle Gro Potting Mix suitable for ALL plant types? 

Miracle Gro Potting Mix is good for all plants. This potting mix is known for aiding plants in growth and fruit production. However, Miracle Gro might not be a good fit if you are trying to have a completely organic garden due to its synthetic fertilizer content. 

Many gardeners use this potting mix because of its simplicity and the fact that it works so well. You can use the soil mix on anything from fruit, vegetable plants, flowers, or bushes. This fertilizer does a great job with hard-to-grow plants like gardenias.

How To Use Miracle Gro Potting Mix

Next, I will discuss using Miracle Gro Potting Mix properly in your garden. However, before we get started, there are some items you will need to acquire. 

What you will need:

  • Miracle Gro Potting Mix
  • A hand shovel
  • A hose
  • A plant pot or other container with good drainage.

Steps for using Miracle Gro Potting Soil:

  1. Select your planting vessel. You should aim for a pot or container with holes in the bottom to allow for proper drainage. Poor drainage can lead to mold and root rot in your plants and soil. 
  2. Fill the bottom of your pot ⅓ of the way up with the potting mix. This measurement doesn’t have to be exact. Simply do your best to add in the new soil and stop when it’s ⅓ of the way up. 
  3. Add in your plants. If your plants are larger and have well-formed roots, loosen them before positioning them in your pot. 
  4. Fill in the rest of the pot with the potting mix. Cover all of your plant’s roots and gently pat down the new soil. Be sure not to add too much mixture as you need space for water to be absorbed.  
  5. Water your plants. Give your new Miracle Gro plants a good watering. Be sure to saturate the soil to unlock the nutrients thoroughly it contains and to give your new plants a nice drink. 

The same steps can still apply if you use this mix on a large scale, like in a garden bed. Simply fill up your container ⅓ of the way from the top before planting. Then add the remainder of the dirt and follow the rest of the steps. 

It’s important to note that Miracle Gro Potting soil only lasts about six months and will need to have fertilizer added or new soil mixed in to continue providing nutrients to your plants. You can do this easily by adding compost or a new bag of potting mix. 

So as you can see, the overall process for using Miracle Gro on your plants is simple. However, if you are a visual learner, I recommend watching Miracle Gro’s Video on how to use their product. They do a great job of showing you exactly what to do quickly. 

Frequently Asked Questions 

Can You Plant Seeds in Miracle Grow Potting Soil?

You can plant seeds in Miracle Gro Potting Soil. Due to the nutrients within Miracle Gro, plants of all ages and types seem to do well in this potting soil. Miracle Gro also makes Seed Starting Potting Mix formulated for growing seeds. 

Can Miracle Grow Potting Mix Be Used for Vegetables?

Miracle Gro Potting Mix can be used for vegetables and is highly effective. Manufacturers design Miracle Gro’s synthetic fertilizer to slowly release nutrients into the soil for your plants to absorb. This slow-release aids your vegetable plants in flowering and producing larger, tastier produce.

Is Miracle Grow Potting Mix Good for Indoor Plants?

Miracle Gro Potting Mix is good for indoor plants. The mix is effective because the fertilizer formula slowly releases nutrients to your plants over time, providing your plants with much-needed food for months. However, remember that your potting mix will need new nutrients added over time. 

Can You Use Miracle Gro Potting Mix Outdoors?

You can use Miracle Gro potting mix outdoors, but potting mixes tend to dry out quite quickly when placed outdoors. For maximum effect, you should opt for a Miracle-gro product specifically designed for outdoor use, such as Miracle Gro Garden Soil. 


Miracle Gro Potting Mix does contain fertilizer. However, the fertilizer used in this product is synthetic, which means it comes from a lab or factory. There’s a lot of speculation on whether synthetic fertilizers are harmful, but many still opt to use them in their gardens. 

Miracle Gro does an excellent job of promoting plant growth and is widely used in gardens all over. If you want to keep your garden completely organic, this mix might not be for you. However, this soil is an excellent option if you don’t mind having synthetic fertilizer in your garden.

Alexander Picot

Alexander Picot is the principal creator of, a website dedicated to gardening tips. Inspired by his mother’s love of gardening, Alex has a passion for taking care of plants and turning backyards into feel-good places and loves to share his experience with the rest of the world.

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