Comparison: Best Kellogg Organic Potting Soil Costco (Updated | Nov 11th)
If you’re on the hunt for the best Kellogg Organic Potting Soil at Costco, you’re not alone—gardeners everywhere are raving about its quality and value. We’ve dug into the details, comparing ingredients, performance, and price, so you don’t have to.
- Best for peat-free blend: Back to the Roots 100% Organic Potting Mix (Value 12 Quart) | Premium Blend | Made in The USA
- Best for quick-release fertilizer: Miracle-Gro Organic Outdoor Potting Mix
- Best for all-purpose topsoil: Michigan Peat 40 Pound Bag Garden Magic Organic Planting Potting Top Soil Blend Mix for Indoor and Outdoor Gardening and Landscapes
- Best for water balance guard: Miracle-Gro Organic Indoor Potting Mix
- Best for mycorrhiza enriched: Espoma Organic Potting Soil Mix – All Natural Potting Mix For All Indoor & Outdoor Containers Including Herbs & Vegetables. For Organic Gardening
- 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
- Best for biochar boost: Wakefield Premium Biochar Blend – Organic Potting Soil for Vegetables
- Best for extended feed mix: Miracle-Gro Organic Outdoor Potting Mix
- Best for microbe-infused premium: FoxFarm Happy Frog Potting Soil
Product Comparison: Best Kellogg Organic Potting Soil Costco
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)
Michigan Peat 40 Pound Bag Garden Magic Organic Planting Potting Top Soil Blend Mix for Indoor and Outdoor Gardening and Landscapes, White
- Ready-to-Use for All Planting Needs: This general-purpose potting mix is ready to use out of the bag, making it perfect for both indoor and outdoor planting without any additional preparation
- Optimal Moisture Retention & Drainage: Designed to allow excess water to drain effectively while retaining moisture, promoting healthy plant growth during dry seasons
- High-Quality Soil Blend: Features a dark blend of reed sedge peat, perlite, and sand, offering the best conditions for plant health and soil structure
- Perfect for All Gardeners: Developed for both new and experienced home gardeners, this soil mix enhances plant growth in various environments and gardening projects
- Improves Soil Quality: Ideal for loosening heavy clay soils and enhancing moisture in light soils, making it perfect for use as a top dressing to fill holes in lawns and garden beds
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 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.
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
Wakefield Premium Biochar Blend – Organic Potting Soil for Vegetables, Tomatoes & Gardens – Potting Mix Enriched with Humic Acid & CarbonBoost – Versatile Top Soil for Indoor & Outdoor Plants-2quarts
- Engineered for Superior Garden Performance: Wakefield’s premium potting soil with biochar, for outdoor plants with Humic acid, and our proprietary CarbonBoost technology, delivering optimal conditions for vibrant, sustained growth. Ideal for everything from raised beds to patio containers, this advanced formula supports healthy root systems whether you’re cultivating juicy tomatoes or leafy herbs.
- Enhanced Root Health and Nutrient Absorption: Formulated as a powerful soil amendment and effective soil conditioner, this advanced biochar blend supports healthy microbial ecosystems for optimized nutrient uptake and improved aeration. Whether you’re cultivating hardy vegetables or delicate herbs, it strengthens root development and enhances long-term fertility. Perfect for gardeners looking to elevate top soil for garden quality or enrich topsoil for vegetable garden beds.
- Smart Water Retention Meets Drainage Balance: Designed with advanced hydration control, this organic vegetable soil helps maintain ideal moisture levels while preventing overwatering. A great fit for container gardening and raised beds, it also works as a reliable soil mixer for sensitive environments. Use it indoor or outdoor, this blend functions beautifully as potting soil for plants.
- 100% Organic, Eco-Conscious Formula: Crafted without synthetic additives, this blend provides a sustainable, chemical-free base for clean cultivation. Ideal for anyone growing vegetables and herbs at home. It performs exceptionally as a gardening soil for vegetables and supports vibrant harvests. Whether you’re using it as a nutrient-rich indoor soil potting mix or as dependable outdoor potting soil, it delivers lasting results.
- Versatile, All-Purpose Growing Medium: From raised beds to balcony containers, this blend adapts effortlessly to diverse planting styles. Whether you’re cultivating with potting soil for outdoor plants, enriching topsoil in open plots, or managing delicate herbs indoors, Wakefield delivers consistent performance. It’s equally effective as indoor plant soil and supports lush growth in compact setups requiring high-quality indoor potting soil.
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)
FoxFarm Happy Frog Potting Soil, 12qt – for Indoor/Outdoor Container Plants, Improves Root Efficiency, pH Adjusted for Optimal Nutrient Uptake – Contains Microbes and Humic Acids
- TOP-TIER SOIL FOR BOUNTIFUL GROWTH: FoxFarm organic potting soil for indoor plants is a blend that boosts both indoor and outdoor gardening. Our planting soil enhances root development and plant health, making it a top choice for flourishing growth
- MICROBE-INFUSED SOIL FOR SUPER ROOTS: Enriched with soil microbes, mycorrhizal fungi, and humic acids, this indoor potting soil for house plants promotes efficient nutrient uptake and boosts root growth by improving root systems and plant vitality
- ESSENTIAL NUTRIENTS FOR THRIVING PLANTS: The garden soil for outdoor plants contains bat guano, earthworm castings, and aged forest products, all essential for enhanced nutrient levels, soil structure, and soil vital organic matter for healthy plants
- OPTIMAL SOIL FOR LUSH CONTAINER BLOOM: Ideal for container gardens, fox farms happy frog potting soil for vegetables’ balanced texture and content is suitable for a wide range of plants including flowers, vegetables, shrubs, and houseplants
- READY-TO-USE CONVENIENT SOIL: Simply fill your container with garden fertilizer houseplant potting soil indoor plants, leaving 1 inch below the rim. Water thoroughly after planting. For best results, supplement growth all the seasons with Fox Farm fertilizers
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 key factors should I consider when selecting an organic potting mix?
Look for the intended use (indoor vs. outdoor), the presence of organic nutrients or fertilizers, and any special amendments like mycorrhizae or biochar. Check the moisture‑retention properties and pH balance to match the plants you’ll grow. Finally, consider whether the mix is peat‑free if you prefer a lower‑carbon option.
How does a peat‑free mix like Back to the Roots compare to peat‑based mixes such as Miracle‑Gro?
Peat‑free blends use upcycled plant material and wood fines, which reduces carbon footprint and often improves drainage. Peat‑based mixes usually hold more water and include quick‑release natural fertilizers, giving a fast nutrient boost. Your choice depends on whether you prioritize sustainability or immediate feeding power.
Which product is best suited for indoor houseplants versus outdoor container gardening?
Back to the Roots 100% Organic Indoor Potting Mix and Miracle‑Gro Organic Indoor Mix are formulated for indoor use, offering moisture control and reduced gnats. For outdoor containers, Miracle‑Gro Organic Outdoor Mix, Espoma Organic Potting Soil, and Wakefield Biochar Blend provide stronger structure and longer‑lasting fertilizers. Choose the indoor option for houseplants and the outdoor blend for garden beds or patio pots.
Are there noticeable price‑to‑value differences among these brands?
While exact prices vary by retailer, larger bags (e.g., 25 qt. Miracle‑Gro Outdoor) often deliver lower cost per quart compared to premium blends like FoxFarm Happy Frog. However, premium mixes include added mycorrhizae, biochar, or specialty nutrients that can reduce the need for supplemental fertilizers. Weigh the upfront cost against the long‑term benefits of richer soil health.
How important are added nutrients such as quick‑release fertilizers or mycorrhizae?
Quick‑release fertilizers give seedlings a rapid start, which is useful for fast‑growing vegetables. Mycorrhizal inoculants, found in Back to the Roots and Espoma, enhance root development and nutrient uptake over time, especially for long‑life perennials. Depending on your planting schedule, you may prefer one or the other, or combine both for optimal growth.
Can the same organic mix be used for both seed starting and mature plants?
Yes, many of the listed mixes, such as Miracle‑Gro Organic Indoor and Back to the Roots Indoor, are suitable for seed starting because they are sterile and well‑draining. For mature plants, the added nutrients and structure in outdoor blends like Wakefield Biochar or FoxFarm Happy Frog can improve long‑term vigor. Switching to a richer mix as plants mature can boost yields.
What environmental considerations should influence my choice of potting soil?
Peat‑free options like Back to the Roots reduce greenhouse‑gas emissions associated with peat extraction. Products that use responsibly sourced peat, such as Miracle‑Gro, still carry a carbon cost but often include recycled content. Look for certifications or statements about sustainable sourcing if minimizing environmental impact is a priority.
How do moisture‑control features differ between the products?
Back to the Roots mixes incorporate yucca extract for moisture retention, helping prevent over‑watering in indoor settings. Miracle‑Gro Outdoor mixes rely on peat’s natural water‑holding capacity, which can be beneficial for outdoor containers but may require careful drainage. Wakefield’s biochar blend balances water retention with aeration, offering a middle ground for both indoor and outdoor use.