Comparison: Best Omri Potting Soil (Updated | Nov 11th)
If you’re on the hunt for the **best OMRI potting soil**, you’re not just gardening—you’re growing with nature in mind. With so many options out there, it’s easy to feel overwhelmed. We’ve dug into the details, tested top contenders, and compared ingredients, performance, and value so you don’t have to. Whether you’re filling containers on a sunny balcony or prepping raised beds for a bountiful harvest, choosing a certified organic, OMRI-listed mix makes all the difference.
- Best for 2-month feed: Miracle-Gro Organic Outdoor Potting Mix
- Best for large-scale mix: Miracle-Gro Organic Outdoor Potting Mix
- Best for water balance mix: Miracle-Gro Organic Indoor Potting Mix
- Best for 12-inch ready: Miracle-Gro Organic Indoor Potting Mix
- Best for bulk indoor mix: Miracle-Gro Organic Indoor Potting Mix
- Best for peat-free expandable: Back to the Roots Organic Coir
- Best for gnats-resistant soil: Miracle-Gro Houseplant Potting Mix: Fertilized
- Best for dual outdoor packs: Miracle-Gro Organic Outdoor Potting Mix
- Best for mycorrhizae-rich soil: Dr. Earth Gold Premium Potting Soil
- Best for lobster-shell nutrients: Coast of Maine Organic & Natural Bar Harbor Blend Potting Soil – Organic Soil w/Perlite for Enhanced Drainage & Aeration – for Flowers
Product Comparison: Best Omri Potting Soil
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 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)
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 Organic Coir, 51 Quart Expanding Soil, Great for Seeds and Potting
- A balanced pH, which means it’s truly all-purpose. Use alone or as an amendment for anything in a pot or in the ground — vegetables, flowers, herbs, and even starting seeds.
- Expands to over 2 cubic feet
- Peat Free OMRI Listed, assuring organic production, handling, and processing
- 100% SATISFACTION GUARANTEE: If you are not satisfied or have any issues with this Organic Coconut Coir, just shoot us a note and our dedicacted customer support team will make sure we get you growing or send you a refund/replacement.
- GROWONEGIVEONE — Share a photo of your growing garden and we’ll donate a Grow Kit and STEM elementary school curriculum to a classroom of your choice.
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., 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)
Dr. Earth Gold Premium Potting Soil, 8 Quart, Natural
- Soil comes in an 8 qt. bag, includes Pro-Moisture Hydrate, is OMRI listed, MycoApply certified and perfectly safe for both pets and people
- Formulated for both indoor and outdoor potting and container use, this soil is a perfect match for your herbs, vegetables, indoor gardens, all container plants and flowers
- You can use it as a soil amendment for the in-ground planting of trees, shrubs, bare roots, flowers and vegetables
- Soil is great for mulching, seed cover, indoor garden production, transplanting, compost use, soil Boosts and even clay soil applications
- Soil is loaded with quality organic ingredients and the welcome addition of TruBiotic soil microbes with both ecto and endo mycorrhizae
- Power source type: Corded Electric
Coast of Maine Organic & Natural Bar Harbor Blend Potting Soil – Organic Soil w/Perlite for Enhanced Drainage & Aeration – for Flowers, Herbs & Veggies, Floral Baskets & Container Gardening (16 Qt)
- PREMIUM INGREDIENTS: Formulated with sphagnum peat moss, compost, perlite, lobster and crab shell meal, and kelp meal, this high-quality, multipurpose organic potting soil provides essential nutrients for healthy plant growth. Specifically formulated to encourage root development and sustained plant growth, promoting healthy, vibrant plants throughout their lifecycle.
- VERSATILE: Bar Harbor Blend is the potting soil for vegetables, indoor plants, fruits, and herb gardens that they love. With a nutrient-rich base, it’s ideal for encouraging growth when using hanging baskets, raised beds, window boxes, or any container garden.
- REVITALIZING PLANT CARE: Bar Harbor Blend revitalizes and improves soil structure by promoting the perfect balance of moisture retention, aeration, and drainage, minimizing the need for frequent watering and fertilizing.
- SUITABLE FOR INDOOR OR OUTDOOR PLANTS: Made with natural slow-release nitrogen, this earth friendly potting soil provides consistent nourishment over time. It’s approved for organic gardening and perfect for both indoor and outdoor plants
- HARVESTING A BRIGHTER FUTURE: Since 1996, Coast of Maine has been dedicated to sustainable, regenerative practices that nourish healthy plants. Our products are made with all-natural components, providing a sustainable, planet-friendly solution for enriching garden soil. Our commitment to quality and environmental stewardship ensures that every product supports a healthier garden and planet.
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 decide between an indoor potting mix and an outdoor potting mix?
Indoor mixes, like Miracle‑Gro Organic Indoor Potting Mix, contain coir and sphagnum peat to balance moisture and prevent over‑watering, which is ideal for houseplants and seed starting. Outdoor mixes are formulated with peat and a quick‑release natural fertilizer that feeds container vegetables, herbs, and perennials for up to two months. Choose the mix that matches the environment where the plant will grow and the watering frequency you can maintain.
What are the advantages of the quick‑release natural fertilizer in Miracle‑Gro Organic mixes?
The quick‑release fertilizer provides nutrients immediately after planting, supporting vigorous early growth and reducing the need for separate feeding. It continues to feed plants for about two months, which is especially helpful for fast‑growing vegetables and annuals. This convenience can lower overall gardening costs compared to buying separate fertilizer products.
How does the coverage differ among the various Miracle‑Gro bag sizes?
A 16‑quart bag of the outdoor mix fills roughly one 12‑inch container, while a 25‑quart bag can fill three 10‑inch containers, offering more volume per plant. For indoor mixes, a 16‑quart bag fills one 12‑inch pot, whereas the 8‑quart bundles are suited for two 8‑inch containers each. Larger bags provide better value per cubic foot, but make sure you have enough storage space before purchasing.
Is coconut coir a viable alternative to peat‑based potting soils?
Coconut coir, as sold by Back to the Roots, expands to over two cubic feet and offers a balanced pH, making it suitable for seeds, vegetables, and herbs. Unlike peat, coir is peat‑free and OMRI‑listed, appealing to gardeners seeking sustainable options. It can be used alone or mixed with other amendments to improve drainage and aeration.
How does Dr. Earth Gold Premium Potting Soil compare to Miracle‑Gro in terms of organic certification?
Dr. Earth Gold is OMRI‑listed, MycoApply certified, and contains TruBiotic microbes, providing a fully organic formulation for both indoor and outdoor use. Miracle‑Gro Organic mixes also use responsibly sourced peat and are labeled as organic, but they focus on a quick‑release natural fertilizer rather than microbial inoculants. Both are certified organic, but Dr. Earth emphasizes soil biology while Miracle‑Gro emphasizes nutrient release.
Should I buy a bundle of potting mix or a single larger bag?
Bundles, such as the two‑bag 16‑quart outdoor mix, give you flexibility to store smaller quantities and reduce waste if you only have a few containers. A single large bag often offers a lower price per quart, which is more economical for extensive garden projects. Consider your planting scale and storage capacity when choosing between the two options.
Do indoor and outdoor potting mixes differ in water retention?
Indoor mixes contain coir and sphagnum peat, which help retain moisture while still providing good aeration, reducing the risk of root rot in low‑light conditions. Outdoor mixes rely more on peat and a fertilizer blend, offering slightly faster drainage suitable for plants that receive more sunlight and frequent watering. Matching the mix to your watering schedule helps prevent over‑ or under‑watering.
Which product offers the best overall value for large container gardening?
For large outdoor containers, the 25‑quart Miracle‑Gro Organic Outdoor Potting Mix provides the most volume per purchase and includes a two‑month nutrient feed, delivering strong value. If you prefer a sustainable, peat‑free option, the 51‑quart Back to the Roots Coconut Coir expands to over two cubic feet and can be mixed with fertilizer for a cost‑effective solution. Evaluate the size of your garden and your preference for organic ingredients to determine the best value.