Comparison: Best Miracle Gro Soil Organic (Updated | Nov 11th)
If you’re on the hunt for the best Miracle-Gro soil that’s actually organic, you’re not alone. We’ve dug into the details—literally—testing and comparing top contenders to see which Miracle-Gro organic soil truly earns its place in your garden. Spoiler: not all “organic” labels are created equal. Let’s break down the real differences so you can grow with confidence and skip the guesswork.
- Best for quick release fertilizer: Miracle-Gro Organic Outdoor Potting Mix
- Best for water balance guard: Miracle-Gro Organic Indoor Potting Mix
- Best for three-month nutrition: Miracle-Gro Performance Organics All Purpose Container Mix with Natural and Organic Ingredients
- Best for dual bag value: Miracle-Gro Organic Outdoor Potting Mix
- Best for seed starter pack: Miracle-Gro Organic Indoor Potting Mix
- Best for large indoor supply: Miracle-Gro Organic Indoor Potting Mix
- Best for bulk outdoor mix: Miracle-Gro Organic Outdoor Potting Mix
- Best for peat-free garden: Miracle-Gro Organic Raised Bed & Garden Soil with Quick Release Natural Fertilizer
- Best for six-month feed: Miracle-Gro Potting Mix
- Best for all-purpose organic: Miracle-Gro Performance Organics All Purpose Container Mix
Product Comparison: Best Miracle Gro Soil Organic
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 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)
Miracle-Gro Performance Organics All Purpose Container Mix with Natural and Organic Ingredients, Feeds Container Grown Vegetables, Flowers and Herbs for up to 3 Months, 1 cu. ft.
- Organic Goodness: Grow vibrant flowers, herbs, and veggies with Miracle-Gro Performance Organics All Purpose Container Mix made with organic and natural ingredients, like aged compost, for the spectacular results you expect
- Bountiful Harvests: Get twice the bounty versus unfed plants for more container-grown vegetables, flowers, and herbs
- How to Use: Perfect for all your indoor and outdoor container gardening, simply fill your favorite pots with this potting soil and watch your flowers, vegetables, and herbs thrive
- Nourish: This premium organic container soil provides continuous plant nutrition for up to 3 months, helping your potted plants flourish
- Trusted Results: Grow confidently with this OMRI Listed container mix that gives you the Miracle-Gro results you love with the organic and natural ingredients you want
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)
Miracle-Gro Organic Indoor Potting Mix, Protects Against Over and Under Watering, for Indoor Container Plants, Houseplants and Starter Plants, OMRI Listed, 8 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 8 qt. bags of Miracle-Gro Organic Indoor Potting Mix; each bag fills two 8-inch containers (amounts 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., 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 Raised Bed & Garden Soil with Quick Release Natural Fertilizer, Peat Free, 1 cu. ft., 2-Pack
- Miracle-Gro Organic Raised Bed & Garden Soil is a soil blend with quick release natural fertilizer
- Feeds plants for up to 2 months
- This organic soil blend is peat free and formulated with upcycled green waste
- Successful Organic Gardening Made Attainable
- This bundle includes two 1 cu. Ft. bags of Miracle-Gro Organic Raised Bed & Garden Soil
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)
Miracle-Gro Performance Organics All Purpose Container Mix, 6 qt. – Organic, All Natural Plant Soil – Feed for up to 3 Months – All-Purpose Formula for Vegetables, Flowers and Herbs
- Container mix feeds your indoor and outdoor container plants all season (up to 3 months)
- Miracle-Gro Performance Organics All Purpose Container Mix delivers twice the bounty – more vegetables, flowers and herbs – with organic and natural ingredients (vs unfed plants)
- An all purpose formula for indoor and outdoor container gardening
- Blended with aged compost
- Enjoy Miracle-Gro results with organic and natural ingredients; OMRI Listed for organic use
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 the indoor and outdoor organic potting mixes?
Indoor mixes contain a blend of sphagnum peat moss, coir, and a quick‑start natural fertilizer designed to protect against over‑ and under‑watering, while outdoor mixes use responsibly sourced peat and focus on quick‑release fertilizer for up to two months. The indoor formula is optimized for container environments with limited drainage, whereas the outdoor version is suited for exposure to the elements and a broader range of plant types.
How does the Performance Organics All Purpose Container Mix compare to the regular Organic Outdoor Mix?
Performance Organics adds aged compost and OMRI‑listed ingredients, delivering continuous nutrition for up to three months and promising twice the harvest versus unfed plants. The regular Organic Outdoor Mix provides a quick‑release fertilizer for about two months and relies on peat as the primary base, making it a solid choice for budget‑focused gardeners.
Is it worth buying the bundled packs instead of single bags?
Bundled packs usually lower the cost per quart and reduce packaging waste, which is ideal for larger gardens or multiple containers. For occasional growers or those testing a product, a single 16‑qt bag may be more practical to avoid excess inventory.
Which product is peat‑free and why might that matter?
The Miracle‑Gro Organic Raised Bed & Garden Soil is the only peat‑free option, using upcycled green waste as its base. This formulation appeals to environmentally conscious gardeners who want to avoid peat extraction impacts while still receiving a quick‑release natural fertilizer.
How long will the built‑in fertilizer feed my plants?
Most organic mixes, including the Indoor, Outdoor, and Raised Bed formulas, provide nutrients for up to two months, while the Performance Organics All Purpose Container Mix extends feeding to about three months. Longer feeding intervals can reduce the need for supplemental fertilization throughout the growing season.
Can I use the indoor mix for seed starting?
Yes, the indoor mix is formulated for both houseplants and seed starting, offering a balanced medium that helps seedlings establish strong roots without the risk of water stress. Its coir component improves aeration, which is beneficial for delicate germinating seeds.
What size container can a 16‑qt bag fill, and how does that affect value?
A 16‑qt bag typically fills one 12‑inch container, though the exact amount may vary with root ball size. When comparing value, consider the number of containers you plan to fill; larger bags or bundles provide a lower cost per container, making them more economical for extensive planting projects.
Are these mixes OMRI‑listed, and what does that mean for organic gardening?
Both the Performance Organics All Purpose Container Mix and the Organic Outdoor Mix are OMRI‑listed, confirming they meet organic certification standards. This designation assures gardeners that the products contain only approved organic ingredients and can be used in certified organic gardens.