Comparison: Best Omri Organic Potting Soil (Updated | Dec 1st)
We’ve dug deep (pun intended) to compare top-rated, certified organic mixes that deliver real results. From lush veggies to vibrant flowers, these soils are proven performers. Let us help you choose the one that’s not only safe for your garden but perfect for your growing goals. Your plants will thank you.
- Best for quick-release fertilizer: Miracle-Gro Organic Outdoor Potting Mix
- Best for water balance guard: Miracle-Gro Organic Indoor Potting Mix
- Best for peat-free premium: Back to the Roots 100% Organic Potting Mix (Value 12 Quart) | Premium Blend | Made in The USA
- Best for large-scale growth: Miracle-Gro Organic Outdoor Potting Mix
- Best for bulk outdoor blend: Miracle-Gro Organic Outdoor Potting Mix
- Best for single indoor pack: Miracle-Gro Organic Indoor Potting Mix
- Best for family indoor supply: Miracle-Gro Organic Indoor Potting Mix
- Best for tomato boost soil: Coast of Maine Organic & Natural Planting Soil for Vegetables & Tomatoes – Premium Planting Soil w/ Composted Manure
- Best for expanding coir mix: Back to the Roots Organic Coir
- Best for nutrient-rich blend: Coast of Maine Organic & Natural Bar Harbor Blend Potting Soil – Organic Soil w/Perlite for Enhanced Drainage & Aeration – for Flowers
Product Comparison: Best Omri 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, 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 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 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 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)
Coast of Maine Organic & Natural Planting Soil for Vegetables & Tomatoes – Premium Planting Soil w/ Composted Manure, Sphagnum Peat Moss for Multi Use Ground & Containers – Enhanced Drainage (20 Qt)
- PREMIUM INGREDIENTS: This specifically crafted organic compost blend provides a lightweight potting mix that supports abundant growth of tomatoes and vegetables.
- VERSATILE VEGETABLE SOIL: Coast of Maine Organic Soil for Tomatoes & Vegetables is used when seeding, transplanting or topping off your in-ground vegetable garden or your indoor and outdoor potted containers.
- REVITALIZING PLANT CARE: Planting Soil for Tomatoes & Vegetables is formulated to balance moisture retention and drainage, making it perfect for both in-ground and container planting.
- EARTH FRIENDLY COMPOST FOR SOIL: OMRI listed for organic use, our organic potting soil for annuals reflects Coast of Maine’s commitment to nature-conscious, responsible gardening practices.
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.
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
What are the key differences between Miracle‑Gro organic outdoor mixes and the Back to the Roots peat‑free potting mix?
Miracle‑Gro outdoor mixes contain a quick‑release natural fertilizer and are made with responsibly sourced peat, which provides excellent water retention for container plants. The Back to the Roots blend is 100 % organic, peat‑free, and uses upcycled plant material and wood fines, offering a lighter carbon footprint and better aeration. Choose Miracle‑Gro if you want built‑in feeding for up to two months, or Back to the Roots if you prefer a peat‑free, sustainably sourced option.
How does bag size affect value when buying organic potting soil?
Larger bags, such as the 25 qt Miracle‑Gro outdoor mix, generally lower the cost per cubic foot and are ideal for filling multiple containers or larger raised beds. Smaller packages, like the two 8 qt indoor mix bags, provide flexibility for indoor gardeners with limited space and reduce waste. Evaluate the number of plants you have and compare the price per volume to determine the most economical choice.
Which product is best for seed starting and young seedlings?
Miracle‑Gro Organic Indoor Potting Mix is formulated with sphagnum peat, coir, and a gentle starter fertilizer, making it excellent for seed germination and delicate transplants. The Back to the Roots Coir expands to over two cubic feet and offers a balanced pH, serving as a sterile medium for seed starting when mixed with a light soil amendment. Both options support strong root development, but the indoor mix adds a nutrient boost right from the start.
Is there a noticeable performance difference between peat‑based and peat‑free mixes for vegetables?
Peat‑based mixes like Miracle‑Gro provide high moisture retention, which can be beneficial for water‑loving vegetables such as tomatoes. Peat‑free blends, such as Back to the Roots’ 100 % organic mix, incorporate yucca extract and dolomitic limestone for better moisture control and pH balance, reducing the risk of over‑watering. Your choice should reflect your watering habits and environmental preferences.
How do the added nutrients in Miracle‑Gro mixes compare to the natural amendments in Coast of Maine soils?
Miracle‑Gro mixes include a quick‑release natural fertilizer that feeds plants for up to two months, offering immediate nutrient availability. Coast of Maine soils rely on slow‑release sources like kelp meal, crab shell meal, and lobster shell meal, providing steady nourishment over a longer period. If you prefer a hands‑off approach with less frequent feeding, Coast of Maine may be the better fit.
What should I consider regarding sustainability when selecting an organic potting soil?
Look for products that are OMRI listed, use responsibly sourced peat, or are peat‑free, as these certifications indicate environmentally conscious production. Back to the Roots’ peat‑free mix and Coast of Maine’s organic blends emphasize low carbon footprints and use renewable ingredients. Additionally, many brands offer a “grow‑one‑give‑one” program, adding a charitable component to your purchase.
Can I mix different organic soils to customize my planting medium?
Yes, combining a peat‑based mix like Miracle‑Gro with a peat‑free amendment such as Back to the Roots Coir can balance moisture retention and aeration while providing a broader nutrient profile. Adjust the ratios based on the specific needs of your plants—more coir for better drainage in succulents, more peat for moisture‑loving herbs. Testing the blend in a small container first helps ensure the mix meets your garden’s requirements.