Comparison: Best Organic Non Gmo Potting Soil (Updated | Nov 11th)
If you’re growing herbs on your windowsill or tomatoes in backyard containers, the right potting soil makes all the difference—especially when you want it organic and non-GMO. We’ve dug into the dirt (literally) to compare the top organic, non-GMO potting soils, evaluating ingredients, texture, moisture control, and real garden results.
- Best for peat-free premium: Back to the Roots 100% Organic Potting Mix (Value 12 Quart) | Premium Blend | Made in The USA
- Best for quick-release outdoor: Miracle-Gro Organic Outdoor Potting Mix
- Best for indoor moisture boost: Back to the Roots 100% Organic Indoor Potting Mix (Value 12 Quart) | Promotes Healthy Houseplant Growth| Made in The USA
- Best for water guard indoor: Miracle-Gro Organic Indoor Potting Mix
- Best for expandable coco mix: 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 dual indoor pack: Miracle-Gro Organic Indoor Potting Mix
- Best for big outdoor bag: Miracle-Gro Organic Outdoor Potting Mix
- Best for outdoor twin pack: Miracle-Gro Organic Outdoor Potting Mix
- Best for houseplant power blend: Organic Potting Soil for Indoor Plants. Boost House Plant Growth for Monstera
- Best for all-natural myco mix: Espoma Organic Potting Soil Mix – All Natural Potting Mix For All Indoor & Outdoor Containers Including Herbs & Vegetables. For Organic Gardening
Product Comparison: Best Organic Non Gmo Potting Soil
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.
- 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 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
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)
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 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)
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)
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.
Espoma Organic Potting Soil Mix – All Natural Potting Mix For All Indoor & Outdoor Containers Including Herbs & Vegetables. For Organic Gardening, 2 Cubic Foot bag. Pack of1
- 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.
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 main differences between organic indoor and outdoor potting mixes?
Indoor mixes, such as Back to the Roots 100% Organic Indoor Potting Mix and Miracle‑Gro Organic Indoor Potting Mix, focus on moisture retention, pest resistance, and a lighter texture to suit houseplants. Outdoor mixes like Miracle‑Gro Organic Outdoor Potting Mix contain quick‑release natural fertilizer and are formulated for tougher weather exposure and larger root systems. The indoor formulas often include yucca extract or mycorrhizae for root health, while outdoor blends rely more on peat and coir for drainage and structure.
How does a peat‑free blend compare to a peat‑based blend in terms of sustainability and plant performance?
Peat‑free options, for example Back to the Roots’ peat‑free mixes, use upcycled plant material and wood fines, reducing carbon footprint and avoiding peat extraction. Peat‑based products like Miracle‑Gro Organic Outdoor Mix use responsibly sourced peat, which still provides excellent water‑holding capacity but has a higher environmental impact. In practice, peat‑free soils perform well for most houseplants, while peat blends may offer slightly better moisture retention for water‑loving outdoor containers.
Which product gives the best value for large‑scale container gardening?
The Miracle‑Gro Organic Outdoor Potting Mix sold in a 25 qt bag fills three 10‑inch containers, providing a low cost per quart for extensive outdoor planting. For indoor use, the bundled two‑bag set of Miracle‑Gro Organic Indoor Potting Mix (two 16 qt bags) also offers a good price per volume and includes quick‑start fertilizer. Both bundles reduce packaging waste and typically cost less per unit than buying single 12‑qt bags of Back to the Roots.
Are there pet‑safe or gnat‑free options among these mixes?
Back to the Roots 100% Organic Indoor Potting Mix is marketed as safe for pets and people, and its lack of bark or compost helps limit gnats. Wonder Soil’s coco‑coir based mix is also pet‑safe and naturally resistant to pests due to its peat‑free composition. By contrast, mixes that contain a high proportion of peat or organic matter, such as some Miracle‑Gro formulas, may attract gnats if over‑watered.
How important are added mycorrhizae and other biological amendments?
Mycorrhizae, found in Back to the Roots Indoor Mix and Espoma Organic Potting Soil, form a symbiotic relationship with plant roots, improving nutrient uptake and drought tolerance. Additional amendments like kelp, worm castings, and beneficial microbes (present in Wonder Soil and the premium indoor blend from Organic Potting Soil for Indoor Plants) boost soil life and can speed up growth. While not strictly required, these biological components often translate to healthier, more vigorous plants, especially in container environments.
What should I look for regarding moisture control and pH balance?
Products that list yucca extract (Back to the Roots mixes) or dolomitic limestone (Back to the Roots and some Miracle‑Gro blends) help regulate moisture and maintain a stable pH, preventing nutrient lockout. Coco‑coir based mixes, like Wonder Soil, naturally retain water while providing good drainage, reducing the risk of over‑watering. Checking for these specific ingredients ensures the soil will stay aerated and pH‑balanced for a wide range of plants.
Do bundle packs provide a better price per quart compared to single bags?
Yes, bundle packs such as the two‑bag 16 qt set of Miracle‑Gro Organic Indoor Potting Mix or the two‑bag 16 qt set of Miracle‑Gro Organic Outdoor Mix typically lower the cost per quart by 10‑15 % versus purchasing individual 12 qt bags. The larger 25 qt bag of Miracle‑Gro Outdoor Mix also offers a reduced unit price, making it economical for gardeners who need to fill multiple containers. Comparing the total volume and price on the product page will confirm the savings.