Comparison: Best Miracle Grow Soil Organic (Updated | Nov 11th)
If you’re on the hunt for the best Miracle-Gro soil that’s actually organic, you’re not alone—and you’re asking the right questions. We’ve dug into the details (literally) to compare the top organic contenders from Miracle-Gro, weighing ingredients, performance, and real-garden results. Whether you’re growing veggies, flowers, or herbs, we’ll help you pick the one that truly delivers—no greenwashing, just honest dirt. Let’s find your perfect match.
- Best for quick-release fertilizer: Miracle-Gro Organic Outdoor Potting Mix
- Best for watering guard: Miracle-Gro Organic Indoor Potting Mix
- Best for indoor bundle: Miracle-Gro Organic Indoor Potting Mix
- Best for peat-free blend: Back to the Roots 100% Organic Potting Mix (Value 12 Quart) | Premium Blend | Made in The USA
- Best for outdoor bundle: Miracle-Gro Organic Outdoor Potting Mix
- Best for large outdoor pack: Miracle-Gro Organic Outdoor Potting Mix
- Best for compact indoor pack: Miracle-Gro Organic Indoor Potting Mix
- Best for mycorrhiza boost: Back to the Roots 100% Organic Indoor Potting Mix (Value 12 Quart) | Promotes Healthy Houseplant Growth| Made in The USA
- Best for all-purpose topsoil: Michigan Peat 40 Pound Bag Garden Magic Organic Planting Potting Top Soil Blend Mix for Indoor and Outdoor Gardening and Landscapes
- Best for premium growth blend: Organic Potting Soil for Indoor Plants. Boost House Plant Growth for Monstera
Product Comparison: Best Miracle Grow Soil Organic
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)
Miracle-Gro Organic Indoor Potting Mix, Protects Against Over and Under Watering, for Indoor Container Plants, Houseplants and Starter Plants, OMRI Listed, 16 qt., 2-Pack
- 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
- This bundle includes two 16 qt. bags of Miracle-Gro Organic Indoor Potting Mix; each bag fills one 12-inch container (amounts may vary based on the size of the root ball)
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 Organic Outdoor Potting Mix, for Outdoor Container Plants, Contains Quick-Release Natural Fertilizer, OMRI Listed, 16 qt., 2-Pack
- 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
- This bundle includes two 16 qt. bags of Miracle-Gro Organic Outdoor Potting Mix; each fills one 12-inch container (amounts may vary based on the size of the root ball)
Miracle-Gro Organic Outdoor Potting Mix, for Outdoor Container Plants, Contains Quick-Release Natural Fertilizer, OMRI Listed, 25 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 25 qt. bag of Miracle-Gro Organic Outdoor Potting Mix fills three 10-inch containers (amount 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, 8 qt., 2-Pack
- 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
- This bundle includes two 8 qt. bags of Miracle-Gro Organic Indoor Potting Mix; each bag fills two 8-inch containers (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
Michigan Peat 40 Pound Bag Garden Magic Organic Planting Potting Top Soil Blend Mix for Indoor and Outdoor Gardening and Landscapes, White
- Ready-to-Use for All Planting Needs: This general-purpose potting mix is ready to use out of the bag, making it perfect for both indoor and outdoor planting without any additional preparation
- Optimal Moisture Retention & Drainage: Designed to allow excess water to drain effectively while retaining moisture, promoting healthy plant growth during dry seasons
- High-Quality Soil Blend: Features a dark blend of reed sedge peat, perlite, and sand, offering the best conditions for plant health and soil structure
- Perfect for All Gardeners: Developed for both new and experienced home gardeners, this soil mix enhances plant growth in various environments and gardening projects
- Improves Soil Quality: Ideal for loosening heavy clay soils and enhancing moisture in light soils, making it perfect for use as a top dressing to fill holes in lawns and garden beds
Organic Potting Soil for Indoor Plants. Boost House Plant Growth for Monstera, Fiddle Leaf, Money Tree, Pothos, Snake Plant, Aroid, Flowers, Herbs, Veggies, & More, Smart Grower 3 LB Ready to Plant
- Maximize Indoor Plant Growth Naturally– This premium organic indoor potting soil blend combines organic compost, peat, biochar, worm castings, and coco coir for a lightweight, nutrient-rich mix. Ideal for indoor herb gardens, vegetables, flowers, and house plants like Monstera, Snake Plants, and Money Trees.
- Save Time and Effort with Your Plants– No need for mixing or expanding soil—just open and plant! Smart Grower organic indoor potting soil provides a hassle-free, nutrient-packed living soil with superior drainage to prevent overwatering and root rot giving you a quick, no -fuss solution for happier indoor plants.
- USA Made, Cruelty-Free & Pet Safe – Feel good with organic indoor plant soil made in the USA without bone meal, fish byproducts, or animal-derived ingredients. This organic indoor plant soil is completely pet-safe, cruelty-free, and non-GMO—perfect for eco-conscious gardeners.
- Quickly Revive & Strengthen Indoor Plants – Supercharged with our root-enhancing blend of mycorrhizal fungi, sea kelp, molasses, yucca extract, Trichoderma, and beneficial Bacillus microbes to revive struggling plants, promote strong root growth, and maximize yields for your indoor plants.
- Made For Healthier Indoor Plants – Expertly designed for optimal indoor plant health, extended indoor plant life, and better yields for indoor vegetable plants, flowers and tropicals. Whether you need Monstera soil, Pothos soil, or an aroid potting mix, snake plant soil, fiddle leaf fig soil, tropical plant soil, this premium blend provides everything your houseplants need to thrive.
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 Miracle‑Gro Organic Indoor and Outdoor potting mixes?
Indoor mixes contain sphagnum peat moss, coir, and a quick‑start fertilizer that helps prevent over‑ and under‑watering, while outdoor mixes use responsibly sourced peat and are formulated for harsher weather exposure. If you’re growing houseplants or starting seeds inside, the indoor blend is best; for container gardens on a patio or balcony, opt for the outdoor version. Both provide up to two months of natural feeding, but the outdoor mix offers better drainage for external conditions.
Is there a cost advantage to buying bundled bags versus single bags?
Bundled packs, such as the two‑bag bundles of Miracle‑Gro Indoor or Outdoor mix, usually lower the per‑quart price compared to buying single 16 qt. bags. The larger 25 qt. outdoor bag also offers a bulk discount and can fill three 10‑inch containers, making it economical for bigger projects. Consider the size of your garden and storage space before deciding.
What are the key differences between the Back to the Roots organic mixes and Miracle‑Gro mixes?
Back to the Roots blends are 100 % organic and peat‑free, using upcycled plant material, yucca extract for moisture control, and dolomitic limestone for pH balance, while Miracle‑Gro mixes contain peat and a quick‑release natural fertilizer. The Back to the Roots indoor mix also includes mycorrhizal fungi to boost root development, whereas Miracle‑Gro focuses on immediate nutrient release. If you prioritize a peat‑free, lower‑carbon‑footprint product, Back to the Roots is the better choice.
Can I use the indoor potting mix for outdoor containers?
While the indoor mix will work in outdoor containers, it lacks the added drainage and weather‑resistance features of the outdoor formulation. Outdoor mixes are designed to handle excess rain and temperature fluctuations, reducing the risk of root rot. For best results, match the mix to the environment where the plant will grow.
Which product offers the best value for growing a variety of herbs and vegetables?
The 25 qt. Miracle‑Gro Outdoor Potting Mix provides enough material to fill three 10‑inch containers and includes a two‑month nutrient feed, making it a strong value for larger herb and vegetable gardens. If you prefer a peat‑free option, the Back to the Roots 12‑qt. all‑purpose mix offers balanced pH and moisture control, though you may need to purchase more for the same volume. Compare the per‑quart price and your garden size to decide.
Do any of these mixes help reduce indoor pests like fungus gnats?
Back to the Roots indoor mix is formulated without bark or compost, which reduces the likelihood of fungus gnats and other pests. Miracle‑Gro Indoor mix does not specifically target gnats, but its balanced moisture retention can help prevent overly soggy conditions that attract them. For pest‑sensitive environments, the peat‑free Back to the Roots option is advantageous.
What should I look for in a potting mix if I want to support strong root development?
Look for mixes that contain mycorrhizal fungi or root‑boosting additives, such as the Back to the Roots indoor blend and the Organic Potting Soil for Indoor Plants, which include mycorrhizae, kelp, and beneficial microbes. These components enhance nutrient uptake and root growth. Miracle‑Gro mixes provide quick‑release fertilizer but lack these specialized biological enhancers.
Is the Michigan Peat topsoil suitable for container gardening?
Michigan Peat is a general‑purpose topsoil blend designed for both indoor and outdoor planting, offering good moisture retention and drainage. However, it does not contain the quick‑release fertilizer or organic additives found in the Miracle‑Gro and Back to the Roots mixes, so you may need to supplement with additional nutrients for container plants. It’s a solid, affordable base if you prefer to customize your own potting mix.