Comparison: Best Natural Organic Potting Soil (Updated | Nov 11th)
If you’re tired of guessing which potting soil actually lives up to its “natural” and “organic” claims, you’re not alone. Whether you’re growing herbs on a windowsill or tomatoes in a raised bed, let’s find the **best natural organic potting soil** that works as hard as you do.
- Best for fast-feed outdoor: Miracle-Gro Organic Outdoor 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 classic organic blend: Natural & Organic Potting Mix
- Best for indoor root boost: Back to the Roots 100% Organic Indoor Potting Mix (Value 12 Quart) | Promotes Healthy Houseplant Growth| Made in The USA
- Best for all-natural enriched: Espoma Organic Potting Soil Mix – All Natural Potting Mix For All Indoor & Outdoor Containers Including Herbs & Vegetables. For Organic Gardening
- Best for coco coir power: WONDER SOIL Organic Potting Soil | Ready to Plant Coco Coir Fully Loaded with Nutrients | 3 LBS Bag Expands to 12 Quarts of Indoor Outdoor Soil for Gardens & Plants | Incl Worm Castings
- Best for bulk outdoor boost: Miracle-Gro Organic Outdoor Potting Mix
- Best for water-guard indoor: Miracle-Gro Organic Indoor Potting Mix
- Best for raised bed ready: Espoma Organic Raised Bed Mix – All Natural and Organic Potting Soil Mix for Growing Vegetables and Herbs in Raised Garden Beds. for Organic Gardening.1.5 Cubic Foot Bag
Product Comparison: Best Natural 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)
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.
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
Espoma Organic Potting Soil Mix – All Natural Potting Mix For All Indoor & Outdoor Containers Including Herbs & Vegetables. For Organic Gardening, 8qt. bag. Pack of 1
- FOR USE ON: Not just an indoor potting soil, this can also be used as a potting soil for outdoor plants and is a great soil mix for vegetables, herbs & all other container plants & flowers.
- CONTAINS: This organic soil for plants & vegetables is a rich blend of sphagnum peat moss, humus & perlite enriched with earthworm castings, alfalfa meal, kelp meal & feather meal
- MYCO-TONE: A proprietary blend of endo & ecto mycorrhizae.
- WHEN TO USE: Any time planting containers, whether starting a new plant or transplanting into a larger container. Plants require regular re-potting and fresh planting soil for optimum growth
- ORGANIC GARDENING: Contains a rich blend of only the finest natural ingredients. No synthetic plant foods or chemicals are used.
WONDER SOIL Organic Potting Soil | Ready to Plant Coco Coir Fully Loaded with Nutrients | 3 LBS Bag Expands to 12 Quarts of Indoor Outdoor Soil for Gardens & Plants | Incl Worm Castings, Perlite
- NUTRIENT RICH & INDOOR/OUTDOOR FAST GERMINATION… Wonder Soil Premium Organic Potting Soil Mix is the only dry compressed coco coir mix with added amendments of worm castings, mycorrhizae, kelp, perlite and more! Grow your plants faster with stronger roots! Peat free, all natural, family and pet safe!
- A LITTLE DOES A LOT… your little BIG bag of compressed indoor potting soil & garden soil for outdoor plants expands to 4 TIMES THE SIZE when mixed with water; easy to carry & saves vital shed space.
- PRE-MIXED & READY TO USE ORGANIC POTTING MIX … Pre-mixed and ready to use organic potting soil and garden soil mix to help make your gardening or hobby growing a breeze. Simply transplant your desired plants into their new container and add our soil mix or pour our soil mix and plant your seeds.
- WATER RETENTION & DRAINAGE… Coco coir has excellent water retention with dependable drainage and aeration in the root zone. Save up to 50% of water, fertilizer, and seed!
- HEAVY DUTY RESEALABLE BAG… Use what you need and save the rest for later! Keeping your planting soil dry and safe!
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, 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)
Espoma Organic Raised Bed Mix – All Natural and Organic Potting Soil Mix for Growing Vegetables and Herbs in Raised Garden Beds. for Organic Gardening.1.5 Cubic Foot Bag
- FOR USE: Ideal for raised garden beds and outdoor containers.
- CONTAINS: This organic soil mix for plants & vegetables is a rich blend of natural and organic ingredients enriched with earthworm castings, alfalfa meal, kelp meal & feather meal
- MYCO-TONE: A proprietary blend of endo & ecto mycorrhizae.
- WHEN TO USE: Use to fill new raised beds or to enhance soil in existing beds. Ready to use
- ORGANIC GARDENING: Contains a rich blend of only the finest natural ingredients. No synthetic plant foods or chemicals are used.
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 should I look for in an organic potting mix for outdoor containers?
Focus on a blend that balances moisture retention, drainage, and nutrient availability. Look for ingredients like peat or coco coir, perlite, and a slow‑release natural fertilizer that can feed plants for several weeks. Certified organic labeling and responsibly sourced components add confidence in quality.
How does Miracle‑Gro Organic Outdoor Potting Mix compare to Back to the Roots Organic Outdoor Mix?
Miracle‑Gro provides a quick‑release natural fertilizer that feeds plants for up to two months, while Back to the Roots is peat‑free and uses upcycled plant material with yucca extract for moisture control. Miracle‑Gro relies on responsibly sourced peat, whereas Back to the Roots emphasizes a lower carbon footprint. Both are all‑purpose, but Back to the Roots may appeal more to eco‑conscious gardeners.
Are peat‑free mixes better for the environment, and which products are peat‑free?
Peat‑free mixes reduce pressure on peat bogs and lower greenhouse‑gas emissions, making them a greener choice. Back to the Roots Outdoor and Indoor mixes, as well as Wonder Soil’s coco coir blend, are completely peat‑free. If sustainability is a priority, these options provide comparable performance without the peat.
Which potting soil offers the best value per container size?
Miracle‑Gro’s 25‑qt. Outdoor Mix fills three 10‑inch containers, giving a low cost per pot compared with the 12‑qt. Back to the Roots bags that cover fewer containers. Wonder Soil’s compressed coco coir expands four‑fold, delivering more volume for the price, which can be the most economical for larger projects.
How important are added mycorrhizae and other amendments in a potting mix?
Mycorrhizae form a symbiotic relationship with plant roots, improving nutrient uptake and drought tolerance, which can boost overall plant health. Products like Espoma and Back to the Roots explicitly list mycorrhizal inoculants, while Wonder Soil also includes them along with kelp and worm castings. Choosing a mix with these amendments can reduce the need for additional fertilizers.
Can I use an indoor‑specific mix for outdoor plants, or vice‑versa?
Indoor mixes, such as Miracle‑Gro Indoor or Back to the Roots Indoor, are formulated for higher moisture retention and pest resistance, which may cause waterlogging outdoors. Conversely, outdoor mixes often have coarser textures for better drainage, which might dry out indoor containers too quickly. It’s best to match the mix to the environment to avoid stress on the plants.
What are the benefits of coco coir‑based mixes like Wonder Soil?
Coco coir offers excellent water retention while providing superior aeration, helping roots breathe and reducing the risk of over‑watering. Wonder Soil also incorporates worm castings, mycorrhizae, and kelp, delivering a nutrient‑rich, peat‑free alternative that expands up to four times its dry volume. This makes it lightweight, space‑saving, and environmentally friendly.
How do I choose between a ready‑to‑use blend and a DIY blend with separate amendments?
Ready‑to‑use blends simplify the planting process and ensure consistent nutrient distribution, which is ideal for beginners or busy gardeners. DIY blends let you customize the ratio of amendments like perlite, compost, or mycorrhizae to suit specific plant needs, but require more knowledge and effort. Consider your experience level, time constraints, and the specific requirements of your plants when deciding.