Comparison: Best Supersoil Potting Mix (Updated | Nov 11th)
But with so many options out there, how do you know which one truly deserves a spot in your pots? We’ve dug deep—literally—to compare the **best supersoil potting mix**es so you can skip the guesswork and give your plants the powerhouse foundation they deserve.
- Best for microbe-rich organic: Brut Organic Potting Soil – 1CF
- Best for peat-free moisture: Back to the Roots 100% Organic Potting Mix (Value 12 Quart) | Premium Blend | Made in The USA
- Best for aquacoir water‑boost: Miracle-Gro Moisture Control Potting Mix
- Best for growth‑maximizer: Miracle-Gro Potting Mix
- Best for gnat‑resistant indoor: Miracle-Gro Houseplant Potting Mix: Fertilized
- Best for organic outdoor boost: Miracle-Gro Organic Outdoor Potting Mix
- Best for balanced indoor organic: Miracle-Gro Organic Indoor Potting Mix
- Best for mycorrhizae root boost: Back to the Roots 100% Organic Indoor Potting Mix (Value 12 Quart) | Promotes Healthy Houseplant Growth| Made in The USA
- Best for coconut coir hydration: Miracle-Gro Indoor Potting Mix
- Best for fast‑drain succulent: Miracle-Gro Cactus
Product Comparison: Best Supersoil Potting Mix
Brut Organic Potting Soil – 1CF, Premium Plant Soil with Organic Worm Castings, Trace Minerals & Perlite – Chemical-Free, Filler-Free – Ideal Potting Mix for Indoor & Outdoor Plants – 1pck
- NATURAL, ORGANIC INGREDIENTS: Made of 100% organic ingredients, this organic potting soil is free from synthetic fertilizers and chemicals. This planting soil gives your plants everything they need. Perfect for soil for indoor plants and outdoor potting soil.
- MICROBE-RICH SOIL: Packed with microbe-rich worm castings and trace minerals like Azomite and kelp, this organic soil feeds plants directly from the root level. Whether you’re growing vegetables, herbs, or flowers, Brut provides the nutrients they need.
- FOR ALL TYPES OF GARDENS: Brut Potting Soil is versatile, perfect as indoor plant soil. It works great for annuals, perennials, & herb plants. This all-purpose potting soil mix makes gardening easy for all plant types from indoor plants to outdoor gardens.
- PURE, FILLER-FREE: Say goodbye to the worry of unknown ingredients. It is pure and filler-free, with no sticks, wood chips, or artificial additives. Brut Organic Potting mix is naturally pH balanced between 6.3 and 6.5, making it perfect for most plants.
- CERTIFIED ORGANIC: Our Potting Soil is OMRI listed, representing true organic excellence and bringing the power of nature’s nutrients. Eco sustainable resorce for your gardening enjoyment!
Back to the Roots 100% Organic Potting Mix (Value 12 Quart) | Premium Blend | Made in The USA
- 100% Organic and Peat-Free: Our potting mix is 100% organic and peat-free—made from upcycled plant matter and wood fines from across the U.S. No imported peat, just better soil with a lighter carbon footprint.
- All-Purpose: Our premium potting mix is versatile and well-suited for herbs, veggies, fruits, and flowers. It caters to all your gardening needs, and is proudly made in the USA.
- Better Moisture Control and pH Balance: Our premium soil blend incorporates yucca extract for moisture control and dolomitic limestone for pH balancing.
- 100% Satisfaction Guarantee: Not satisfied? Let us know. Our support team will get you growing with a replacement or refund—no questions asked.
- GROWONEGIVEONE — Share a photo of your growing garden and we’ll donate a Kids Grow Kit and STEM elementary school curriculum to a classroom of your choice.
Miracle-Gro Moisture Control Potting Mix, For Container Plants, Protects against Over- and Under-Watering, 8 qt., 2-Pack
- Miracle-Gro Moisture Control Potting Mix feeds plants for up to 6 months and Grows Plants Twice As Big! (vs unfed plants)
- This potting medium protects against over and under watering; also absorbs up to 33% more water than basic potting soil* with exclusive AquaCoir Formula (*soil that does not contain sphagnum peat moss, coir, and wetting agent)
- Use this gardening product with all types of container plants, including flowers, vegetables, annuals, perennials, and shrubs
- To use this potting soil, fill a container about 1/3 full with potting mix; place your plant in the pot and cover with more mix
- This bundle comes with two 8 qt. bags of Miracle-Gro Moisture Control Potting Mix; each fills two 8-inch containers (exact amounts may vary depending on the size of the root ball)
Miracle-Gro Potting Mix, For Container Plants, Flowers, Vegetables, Annuals, Perennials, Shrubs, Feeds for up to 6 Months, 16. qt., 2-Pack
- Miracle-Gro Potting Mix feeds container plants for up to 6 months so you get more blooms for more color (vs. unfed plants)
- How to use: To use this potting medium, fill a container about 1/3 full with potting mix, place your plant in the soil, and fill the rest of the pot, pressing lightly
- What’s included: This bundles includes two 16 qt. bags of Miracle-Gro Potting Mix, each able to fill one 12-inch container (exact amounts may vary based on root ball size)
- Where to Use: Use this home gardening product with all types of container plants, including annual and perennial flowers, vegetables, herbs and shrubs
- This potting soil mix Grows Plants Twice As Big (vs. unfed plants)
Miracle-Gro Houseplant Potting Mix: Fertilized, Perlite Soil for Indoor Gardening, Designed to Be Less Prone to Gnats, 4 qt.
- Growing indoors is easy under the right conditions; Miracle-Gro Houseplant Potting Mix combines key elements plants need to thrive
- Recommended for growing beautiful indoor houseplant varieties like Pothos, Spider Plants, Monstera, Philodendron, English Ivy and more
- This indoor plant soil is less prone to gnats, thanks to the combination of perlite, sphagnum and peat moss that’s just right
- Certified by the Mulch & Soil Council as a quality product in compliance with industry standards
- A single 4-qt bag fills an 8-inch container; for even more spectacular results, start regular feedings with Miracle-Gro Plant Food 30 days after planting
Miracle-Gro Organic Outdoor Potting Mix, for Outdoor Container Plants, Contains Quick-Release Natural Fertilizer, OMRI Listed, 16 qt.
- Miracle-Gro Organic Outdoor Potting Mix contains a quick-release natural fertilizer and also feeds plants for up to 2 months
- This potting mix is made with responsibly sourced peat (one hundred percent of peat sourced from certified producers)
- Use this organic potting mix with all types of outdoor container plants, including flowers, vegetables, herbs, annuals, and perennials
- To plant in pots, fill the container partially full with potting mix, place the plant in the pot after loosening the root ball, cover with more mix and water thoroughly
- One 16 qt. bag of Miracle-Gro Organic Outdoor Potting Mix fills one 12-inch container (amounts may vary based on the size of the root ball)
Miracle-Gro Organic Indoor Potting Mix, Protects Against Over and Under Watering, for Indoor Container Plants, Houseplants and Starter Plants, OMRI Listed, 16 qt.
- Miracle-Gro Organic Indoor Potting Mix protects indoor plants against over and under watering
- This organic container mix is made with responsibly sourced sphagnum peat moss (one hundred percent of peat sourced from certified producers), coir, and quick-start natural fertilizer
- Use this potting medium with all types of indoor container plants, including houseplants and herbs; also great for seed starting
- To plant seeds, fill container with potting mix, follow seed package planting directions, and water; To use with transplants, partially fill container, place plant after loosening the root ball, cover with more mix pressing lightly, and water
- One 16 qt. bag of Miracle-Gro Organic Indoor Potting Mix fills one 12-inch container (amounts may vary based on the size of the root ball)
Back to the Roots 100% Organic Indoor Potting Mix (Value 12 Quart) | Promotes Healthy Houseplant Growth| Made in The USA
- FORMULATED FOR INDOOR USE: Our Potting Mix contains organic yucca extract that aids in retaining moisture in the soil whichs keeps your indoor plants happy and healthy
- ROOT-BOOSTING MYCORRHIZAE: This beneficial soil component provides your plants with a natural, organic way to boost their root development and nutrient uptake
- ORGANIC AND PEAT-FREE: Our indoor potting mix helps reduce greenhouse emissions and environmental impact, making it a responsible choice for conscious consumers
- BALANCING DOLOMITIC LIMESTONE: Balances the alkalinity and acidity levels of the soil, which ensures that your plants receive the necessary nutrients from the potting mix to grow healthy and strong
- SAFE FOR PETS AND PEOPLE: Made without bark or compost, this potting mix is less prone to indoor gnats and pests, making it a worry-free option for your indoor gardening needs
Miracle-Gro Indoor Potting Mix, Blended for a Variety of Houseplants, Feeds for up to 6 Months, 16 qt., 2-Pack
- Miracle-Gro Indoor Potting Mix feeds houseplants for up to 6 months and is designed to be less prone to gnats (contains no compost or bark, which are known to shelter fungus gnats)
- This potting mix contains coconut coir, which holds and releases water and helps soil re-wet
- Where to use: Blended for a wide variety of indoor container plants, including climbing, foliage, flowering, and tropical plants
- How to use: To use, fill a container about 1/3 full with potting mix; add more mix after placing your plant in the pot
- What’s included: This bundles includes two 16 qt. bags of Miracle-Gro Indoor Potting Mix, each able to fill one 12-inch containers (exact amount may vary based on the root ball size)
Miracle-Gro Cactus, Palm and Citrus Potting Mix, for Indoor or Outdoor Potted Plants, Great for Succulents, 8 qt., 2-Pack
- Miracle-Gro Cactus, Palm & Citrus Potting Mix features a fast-draining formula and is enriched with Miracle-Gro Plant Food
- This fast-draining formula is blended to help promote successful growing of cacti, potted palms, citrus, and other succulents
- This cactus potting mix is designed for indoor and outdoor container plants, including cacti, palm plants, citrus trees, and succulents
- To use this succulent soil mix, fill a pot with a drainage hole 1/3 full of mix, top with more mix after placing plant, and press lightly
- This bundle includes two 8 qt. bags of Miracle-Gro Cactus, Palm & Citrus Potting Mix, each able to fill two 8-inch containers (amounts may vary based on root ball size)
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product.
Buying Guide
FAQs
How do I choose between an organic potting mix and a synthetic blend?
Organic mixes like Brut Organic and Back to the Roots use natural ingredients such as worm castings, kelp, and yucca extract, which appeal to environmentally‑conscious gardeners and reduce chemical exposure. Synthetic blends, such as Miracle‑Gro Moisture Control, often contain engineered fertilizers that feed plants for several months and may boost growth faster. Consider your plant type, any sensitivities, and whether you prioritize sustainability over rapid results.
Which mix offers the best moisture management for container plants?
Miracle‑Gro Moisture Control Potting Mix uses an AquaCoir formula that absorbs up to 33% more water and helps prevent over‑ or under‑watering. Back to the Roots Indoor Mix includes yucca extract for moisture retention, while the standard Miracle‑Gro Indoor Mix relies on coconut coir and perlite for balanced drainage. Choose a product based on how often you can water and the humidity level of your growing area.
What are the key differences between indoor and outdoor potting mixes?
Indoor mixes, such as Miracle‑Gro Houseplant and Back to the Roots Indoor, focus on pest resistance, lighter texture, and balanced pH for houseplants, often omitting bark to reduce gnats. Outdoor mixes like Miracle‑Gro Organic Outdoor and the Cactus, Palm & Citrus blend are formulated for faster drainage and added nutrients to withstand harsher conditions. Match the mix to the plant’s environment to ensure optimal root health.
Is the added cost of a certified‑organic mix worth it?
Certified‑organic mixes (e.g., Brut Organic, Back to the Roots) are OMRI‑listed and free from synthetic fertilizers, which can be important for organic gardening certifications and for those avoiding chemicals. They may be priced higher, but they provide natural micronutrients and often have a lower environmental footprint. If you value organic standards and long‑term soil health, the premium can be justified.
How do the nutrient release periods compare across these products?
Miracle‑Gro Moisture Control and the standard Miracle‑Gro Potting Mix claim up to six months of feeding, delivering rapid growth. Organic options like Miracle‑Gro Organic Indoor/Outdoor and Back to the Roots provide natural, quick‑release fertilizers that typically last two to three months. Assess how frequently you want to supplement with additional fertilizer when selecting a mix.
What should I consider about bag size and value for my gardening projects?
Bag sizes range from 4 qt (Miracle‑Gro Houseplant) to 16 qt (Miracle‑Gro Indoor, Organic Outdoor) and multi‑bag bundles. Larger bags often lower the per‑quart cost, which is beneficial for extensive container gardens, while smaller bags are convenient for occasional indoor use. Calculate the volume needed for your pots and compare the price per cubic foot to get the best value.
Are any of these mixes better for preventing fungus gnats and other pests?
Mixes that avoid compost or bark, such as Miracle‑Gro Houseplant, Back to the Roots Indoor, and the Miracle‑Gro Indoor blend, are less prone to harboring fungus gnats. Organic mixes with worm castings can sometimes attract pests if over‑moistened, but the addition of yucca extract in Back to the Roots helps regulate moisture. Choose a pest‑resistant formulation if you’ve struggled with gnats in the past.