Comparison: Best Omri Certified Organic Potting Soil (Updated | Nov 11th)
But with so many options out there, how do you choose the **best OMRI Certified Organic potting soil**? We’ve done the digging—literally—testing and comparing top-rated blends to find which ones deliver real results. From nutrient-rich mixes to superior moisture retention, we’ll break down what makes each stand out. Whether you’re filling containers or starting seedlings, trust us to help you pick the perfect organic potting soil for a thriving, sustainable garden.
- Best for quick release: Miracle-Gro Organic Outdoor Potting Mix
- Best for dual indoor: 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 large outdoor: Miracle-Gro Organic Outdoor Potting Mix
- Best for compact indoor: Miracle-Gro Organic Indoor Potting Mix
- Best for standard indoor: Miracle-Gro Organic Indoor Potting Mix
- Best for outdoor bundle: Miracle-Gro Organic Outdoor Potting Mix
- Best for expanding coir: Back to the Roots Organic Coir
- Best for mycorrhizae boost: Dr. Earth Gold Premium Potting Soil
- Best for pet-safe indoor: Back to the Roots 100% Organic Indoor Potting Mix (Value 12 Quart) | Promotes Healthy Houseplant Growth| Made in The USA
Product Comparison: Best Omri Certified Organic 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 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, 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 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)
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.
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
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
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
What are the key differences between organic indoor and outdoor potting mixes?
Indoor mixes, like Miracle‑Gro Organic Indoor, contain coir and sphagnum peat moss to improve aeration and prevent over‑watering, while outdoor mixes use a higher peat content and a quick‑release natural fertilizer for longer feeding periods. Outdoor blends are formulated for harsher conditions and larger root systems, whereas indoor blends focus on moisture balance and root‑zone stability.
Is peat‑free potting soil worth the extra cost?
Peat‑free options such as Back to the Roots 100 % Organic mixes use upcycled plant material and wood fines, offering a lighter carbon footprint and often better moisture control thanks to yucca extract. While they may be slightly pricier per quart, the environmental benefits and comparable performance for herbs, veggies, and flowers make them a valuable investment for eco‑conscious gardeners.
How do I decide which bag size gives the best value?
Larger bags, like the 25 qt Miracle‑Gro Outdoor mix, typically lower the cost per cubic foot and are ideal for multiple containers or larger planters. Smaller bundles, such as the 8 qt indoor packs, are better for limited space or trial runs, but the per‑unit price is higher, so consider your planting volume before purchasing.
Which product is best for seed starting and transplanting?
Miracle‑Gro Organic Indoor Mix and Back to the Roots 100 % Organic Indoor Mix both include quick‑start natural fertilizer and a balanced pH, making them excellent for seed germination and delicate transplants. The indoor mix’s coir component improves drainage, while the Back to the Roots formula adds yucca extract for moisture retention, both supporting healthy seedling growth.
Do any of these mixes contain added fertilizers?
Yes, Miracle‑Gro’s organic mixes incorporate a quick‑release natural fertilizer that feeds plants for up to two months, providing an immediate nutrient boost. In contrast, Back to the Roots and Dr. Earth Gold rely on organic amendments and mycorrhizal microbes without synthetic fertilizers, offering slower, steady nutrient release.
Are these potting soils safe for pets and children?
Most of the listed products are OMRI‑listed and free from harmful chemicals; Dr. Earth Gold explicitly states it is safe for pets and people, and Back to the Roots Indoor Mix avoids bark and compost, reducing gnats and pest issues. Always check the label for any specific warnings, but overall these mixes are formulated with household safety in mind.
What should I look for in a potting mix if I want better moisture control?
Mixes that include coir, yucca extract, or dolomitic limestone—such as Miracle‑Gro Indoor and Back to the Roots Indoor—provide superior moisture retention and pH balance. These ingredients help prevent both over‑watering and drying out, keeping the root zone consistently moist for indoor plants.
How do the sustainability credentials compare across brands?
Miracle‑Gro highlights responsibly sourced peat from certified producers, while Back to the Roots emphasizes peat‑free, upcycled materials and a reduced carbon footprint. Dr. Earth Gold also carries OMRI certification, ensuring organic production standards, making each brand strong in different sustainability aspects.