Comparison: Best Kellogg Potting Soil Costco (Updated | Nov 11th)
If you’re on the hunt for the best Kellogg potting soil at Costco, you’re not alone—gardeners everywhere are raving about its quality and value. But with so many options lining the warehouse shelves, how do you know which bag is truly worth your hard-earned cash? We’ve dug into the details, tested the textures, and compared the costs so you don’t have to.
- Best for quick‑release fertilizer: Miracle-Gro Organic Outdoor Potting Mix
- Best for twice‑size boost: Miracle-Gro Potting Mix
- Best for peat‑free organic: Back to the Roots 100% Organic Potting Mix (Value 12 Quart) | Premium Blend | Made in The USA
- Best for moisture control: Miracle-Gro Moisture Control Potting Mix
- Best for all‑purpose soil: Michigan Peat 40 Pound Bag Garden Magic Organic Planting Potting Top Soil Blend Mix for Indoor and Outdoor Gardening and Landscapes
- Best for gnat‑resistant soil: Miracle-Gro Houseplant Potting Mix: Fertilized
- Best for premium nutrient blend: FoxFarm Ocean Forest Potting Soil
- Best for indoor water guard: Miracle-Gro Organic Indoor Potting Mix
- Best for microbe‑rich soil: FoxFarm Happy Frog Potting Soil
Product Comparison: Best Kellogg Potting Soil Costco
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 Potting Mix, For Container Plants, Flowers, Vegetables, Annuals, Perennials, Shrubs, Feeds for up to 6 Months, 16. qt., 2-Pack
- Miracle-Gro Potting Mix feeds container plants for up to 6 months so you get more blooms for more color (vs. unfed plants)
- How to use: To use this potting medium, fill a container about 1/3 full with potting mix, place your plant in the soil, and fill the rest of the pot, pressing lightly
- What’s included: This bundles includes two 16 qt. bags of Miracle-Gro Potting Mix, each able to fill one 12-inch container (exact amounts may vary based on root ball size)
- Where to Use: Use this home gardening product with all types of container plants, including annual and perennial flowers, vegetables, herbs and shrubs
- This potting soil mix Grows Plants Twice As Big (vs. unfed plants)
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 Moisture Control Potting Mix, For Container Plants, Protects against Over- and Under-Watering, 8 qt., 2-Pack
- Miracle-Gro Moisture Control Potting Mix feeds plants for up to 6 months and Grows Plants Twice As Big! (vs unfed plants)
- This potting medium protects against over and under watering; also absorbs up to 33% more water than basic potting soil* with exclusive AquaCoir Formula (*soil that does not contain sphagnum peat moss, coir, and wetting agent)
- Use this gardening product with all types of container plants, including flowers, vegetables, annuals, perennials, and shrubs
- To use this potting soil, fill a container about 1/3 full with potting mix; place your plant in the pot and cover with more mix
- This bundle comes with two 8 qt. bags of Miracle-Gro Moisture Control Potting Mix; each fills two 8-inch containers (exact amounts may vary depending 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 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 Ocean Forest Potting Soil, 12qt – Light, Aerated Texture, Designed for All Container Plants – pH Adjusted for Optimal Nutrient Uptake, Effectively Retains Moisture (12 Quart (2 Pack))
- ALL-IN-ONE POTTING SOIL SOLUTION: FoxFarm ocean forest potting soil is a blend designed to give your plants everything they need to thrive. Ideal for container plants, this planting soil provides optimal nutrient and soil aeration
- MOISTURE-LOCKING NUTRIENT BLEND: This organic potting soil for plant is packed with aged forest products, sphagnum peat moss, earthworm castings, bat guano, and fish emulsion, each ingredient enhances moisture retention and nutrient uptake
- TOP-NOTCH SOIL FOR EVERY PLANT: From roses and shrubs to seedlings and trees, this garden soil supports vigorous growth and branching. This outdoor & indoor plant soil’s pH-adjusted blend promotes healthy, lush foliage for all plant varieties
- YOUR GO-TO SOIL FOR ALL MEDIUMS: Our potting soil mix is perfect for container gardens, houseplants, and outdoor setups. Ocean plant versatile blend provides a balanced environment for robust growth, ensuring your plants thrive in any setting
- CONVENIENT SOIL READY TO USE: This houseplant potting soil is ready to use out of the bag, no additional ingredients are needed. Use for planting or top-dressing, with the optional pairing of FoxFarm liquid fertilizers for enhanced growth all season
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)
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
How do I choose between an organic and a synthetic potting mix?
Organic mixes, like the Back to the Roots 100% Organic Potting Mix, use peat‑free, upcycled materials and provide natural nutrients, which are ideal for eco‑conscious gardeners. Synthetic options, such as Miracle‑Gro Potting Mix, include added fertilizers for faster growth but may contain peat and chemical additives. Consider your plant type, environmental priorities, and whether you prefer a ready‑to‑feed formula versus a more natural soil amendment.
What is the benefit of moisture‑control potting soil?
Moisture‑control blends, like Miracle‑Gro Moisture Control Potting Mix, incorporate AquaCoir to absorb up to 33% more water, reducing the risk of over‑ or under‑watering. This can be especially helpful for busy gardeners or those in fluctuating climates. The added fertilizer also supports growth for up to six months, offering good value for the price.
Which product gives the best value per container size?
Miracle‑Gro Potting Mix comes in a two‑bag bundle of 16‑qt bags, each filling a 12‑inch pot, making it cost‑effective for larger garden projects. In contrast, the FoxFarm Ocean Forest 12‑qt bag is premium‑priced but includes high‑end amendments like bat guano and fish emulsion. Compare the total cost per cubic foot of soil and the included nutrients to determine the best bang for your buck.
Are there potting mixes suitable for both indoor and outdoor plants?
Yes, several mixes are versatile: Miracle‑Gro Organic Indoor Potting Mix works well for houseplants and can also be used for outdoor containers, while FoxFarm Happy Frog offers a balanced blend for indoor and outdoor use. Look for products that mention a wide plant range and have a pH‑adjusted formula to ensure compatibility across environments.
What should I look for in the ingredient list for healthy root development?
Ingredients like earthworm castings, bat guano, and mycorrhizal fungi (found in FoxFarm Happy Frog) enrich the soil with microbes that boost root growth. Coir and peat provide structure and moisture retention, while perlite improves aeration. A mix that balances organic matter with aeration agents typically promotes vigorous, healthy roots.
How important is the bag size when planning a garden project?
Bag size determines how many containers you can fill; a 16‑qt bag generally fills one 12‑inch pot, while an 8‑qt bag covers two 8‑inch pots. For larger beds, buying multi‑bag bundles can reduce per‑bag cost and ensure consistent soil composition. Always calculate the volume of your containers before purchasing to avoid running short.
Do any of these potting soils help reduce pest issues like fungus gnats?
Miracle‑Gro Houseplant Potting Mix includes a perlite‑rich blend that discourages gnats by improving drainage and reducing excess moisture. Organic mixes with less peat, such as Back to the Roots, also tend to be less attractive to gnats. Pairing the soil with proper watering practices further minimizes pest problems.
What added value features should I consider beyond just the soil?
Look for mixes that include quick‑release natural fertilizers, moisture‑locking formulas, or sustainability certifications, like responsibly sourced peat in Miracle‑Gro Organic mixes. Some brands also offer satisfaction guarantees or charitable programs, such as Back to the Roots’ GrowOneGiveOne initiative. These extras can enhance the overall gardening experience and provide peace of mind.