Comparison: Best Potting Soil With Mycorrhizae (Updated | Nov 11th)
We’ve dug into the top contenders to find which ones deliver real results. Whether you’re growing lush houseplants or vibrant garden blooms, choosing the best mycorrhizae-infused mix can make all the difference. Let’s break down the best options so you can grow with confidence.
- Best for indoor mycorrhiza boost: Back to the Roots 100% Organic Indoor Potting Mix (Value 12 Quart) | Promotes Healthy Houseplant Growth| Made in The USA
- Best for seed starter myco: Espoma Organic Seed Starter Premium Potting Soil Mix – All Natural & Organic Seed Starting Mix with Mycorrhizae. 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 concentrated myco boost: Myco Bliss Powder (1lb) – Mycorrhizal Fungi for Soil – 5 Strain Mycorrhizal Inoculant with 1000 Propagules Per Gram – Highly Concentrated Mycorrhizae for Plants
- Best for premium all-purpose: Back to the Roots 100% Organic Potting Mix (Value 12 Quart) | Premium Blend | Made in The USA
- Best for houseplant ready mix: Miracle-Gro Houseplant Potting Mix: Fertilized
- Best for microbe-infused soil: FoxFarm Happy Frog Potting Soil
- Best for bulk microbe soil: FoxFarm Happy Frog Potting Soil
Product Comparison: Best Potting Soil With Mycorrhizae
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 Seed Starter Premium Potting Soil Mix – All Natural & Organic Seed Starting Mix with Mycorrhizae. For Organic Gardening, 16 qt, bag – Pack of One
- CONTAINS: This organic Seed Stating soil mix is a rich blend of sphagnum peat moss & perlite with yucca extract and lime to ensure correct pH.
- MYCO-TONE: A blend of endo & ecto mycorrhizae.
- WHEN TO USE: Use to germinate and start seeds. Great for flower, vegetable, herb & more plant types. Can also be used to root stem and leaf cuttings.
- PROMOTE ROOT GROWTH: Organic seed starter mix ensures ideal moisture retention and aeration.
- 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!
Myco Bliss Powder (1lb) – Mycorrhizal Fungi for Soil – 5 Strain Mycorrhizal Inoculant with 1000 Propagules Per Gram – Highly Concentrated Mycorrhizae for Plants, Potting Soil, & Garden Soil
- Mycorrhizal Fungi Inoculant for Plants – Myco Bliss contains 5 high performing strains of mycorrhizal fungi that form powerful symbiotic relationships with plant roots, drastically improving nutrient absorption and water retention in indoor plants, outdoor plants, and potting mixes. (Mycorrhizae powder can be applied directly to seeds and developing roots.)
- Super Concentrated Mycorrhizae – Myco Bliss is a powerful mycorrhizal inoculant for plants, boasting 1,000 propagules per gram and treating up to 100 plants per pound. Don’t fall for others trying to sell you lifeless powder in a bag – Myco Bliss is a highly concentrated formula with zero weak propagules, giving you efficient results for potting soil and garden soil.
- Retains Water & Nutrients – Using mycorrhizal fungi for plants helps them absorb water and nutrients they can’t normally access. Thanks to its excellent moisture retention, mycorrhizal rooting powder stores water and nutrients when it’s dry or humid, so you can rest assured knowing your plants are staying happy and hydrated.
- Improves Resistance to Abiotic Stress – As bonds form between plant roots, Myco Bliss alleviates transplant shock and improves nutrient uptake to protect against abiotic stress. Plus, mycorrhizal powder helps protect against drought, salinity, and acidity, making Myco the perfect soil inoculant for beans and peas, garden containers, garden pots, lawns, flower beds, and other fertilizers.
- Reduces Fertilizer Dependency – Our mycorrhizal for plants is made with no synthetic ingredients, making mycorrhizae fertilizer a cost-effective and sustainable solution for boosting nutrient absorption and drought tolerance. Because it helps with nutrient uptake, Myco Bliss reduces dependency on other garden fertilizers, saving you time, money, and hassle.
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 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
FoxFarm Happy Frog Potting Soil, 2cu ft – for Indoor/Outdoor Container Plants, Improves Root Efficiency, pH Adjusted for Optimal Nutrient Uptake – Contains Mycorrhizae and Humic Acids
- You will receive (1) 2-cubic foot bag of potting soil per purchase.
- Amended with soil microbes that improve root efficiency and convert nutrients into a form that plants can utilize, enhancing fruit and flower production.
- Designed for container plants, indoor or outdoor. Whether you need a boost in your fruits, vegetables, flowers, or houseplants – Happy Frog will jump-start your containers!
- This unique mix is alive with beneficial soil microbes and mycorrhizal fungi that dramatically expands root development.
- A blend of 50-60% aged forest products, sphagnum peat moss, perlite, and fertilizer. Derived from earthworm castings, oyster shell and dolomite lime.
FoxFarm Happy Frog Potting Soil, 2cu ft (Pack of 2) – for Indoor/Outdoor Container Plants, Improves Root Efficiency, pH Adjusted for Optimal Nutrient Uptake – Contains Mycorrhizae and Humic Acids
- You will receive (2) 2-cubic foot bags of potting soil per purchase.
- Amended with soil microbes that improve root efficiency and convert nutrients into a form that plants can utilize, enhancing fruit and flower production.
- Designed for container plants, indoor or outdoor. Whether you need a boost in your fruits, vegetables, flowers, or houseplants – Happy Frog will jump-start your containers!
- This unique mix is alive with beneficial soil microbes and mycorrhizal fungi that dramatically expands root development.
- A blend of 50-60% aged forest products, sphagnum peat moss, perlite, and fertilizer. Derived from earthworm castings, oyster shell and dolomite lime.
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 prioritize when choosing a potting mix with mycorrhizae?
Look for a blend that combines organic nutrients, moisture‑retention agents, and a proven mycorrhizal inoculant. Products that are peat‑free and include pH‑balancing components like dolomitic limestone can improve root health. Also consider pet‑ and child‑safety, especially for indoor use.
How does Back to the Roots’ organic mix compare to FoxFarm’s Happy Frog soil?
Back to the Roots offers a 100% organic, peat‑free formula with yucca extract for moisture control and a single mycorrhizal strain, ideal for casual indoor growers. FoxFarm’s Happy Frog is richer in microbial life, contains multiple mycorrhizal fungi, and adds worm castings and oyster shell for faster nutrient release, making it better for heavy‑feeding vegetables and fruiting plants.
Is a dedicated seed‑starter mix like Espoma’s worth buying over a general potting soil?
Espoma’s Seed Starter mix is formulated with a fine balance of peat, perlite, and mycorrhizae specifically for germination, giving seedlings a gentle, well‑aerated environment. General potting soils may be too dense for delicate seedlings, so using a starter mix can improve germination rates and reduce transplant shock.
Can I boost the mycorrhizal content of a basic potting mix with Myco Bliss powder?
Yes, Myco Bliss is a highly concentrated inoculant that adds five robust mycorrhizal strains to any soil, enhancing nutrient uptake and drought tolerance. It’s especially useful if you already have a favorite potting mix but want to increase the symbiotic benefits without switching products.
What are the water‑management differences between Wonder Soil’s coco‑coir blend and Miracle‑Gro’s peat‑based mix?
Wonder Soil’s coco‑coir retains water while providing excellent drainage, reducing watering frequency by up to 50%. Miracle‑Gro relies on peat and perlite, which also hold moisture but can dry out faster, requiring more regular watering for the same plant size.
Is there a cost‑effective option for large‑scale indoor gardening?
Back to the Roots’ 12‑quart value pack and FoxFarm’s 2‑cubic‑foot bags both offer bulk pricing, but FoxFarm includes more microbial diversity and nutrients per volume, which can lower long‑term fertilizer costs. For pure budget, the Back to the Roots pack provides decent mycorrhizae and organic ingredients at a lower price point.
Do any of these mixes reduce the risk of indoor gnats?
Back to the Roots and Miracle‑Gro explicitly mention reduced gnat attraction due to the absence of bark and a balanced peat‑perlite blend. Coco‑coir mixes like Wonder Soil also tend to be less appealing to gnats because of their lower organic decay rate.
How important is the source of mycorrhizae—organic vs. synthetic—in these products?
Organic mycorrhizae, found in mixes like Back to the Roots and Espoma, are derived from natural fungal cultures and integrate seamlessly with soil microbes. Synthetic inoculants can be effective but may lack the broader microbial community, potentially limiting long‑term soil health benefits.