Comparison: Best Miracle Gro Potting Soil Organic (Updated | Nov 11th)
If you’re on the hunt for the best Miracle-Gro potting soil that’s actually organic, you’re not alone. We’ve dug into the details—literally—testing and comparing top contenders to find which Miracle-Gro blend truly earns its organic label. Spoiler: not all “organic” soils are created equal. Let’s break down what really works for your garden, your veggies, and your peace of mind.
- Best for outdoor quick fertilizer: Miracle-Gro Organic Outdoor Potting Mix
- Best for indoor water guard: Miracle-Gro Organic Indoor Potting Mix
- Best for indoor bundle value: Miracle-Gro Organic Indoor Potting Mix
- Best for outdoor bulk pack: Miracle-Gro Organic Outdoor Potting Mix
- Best for large outdoor supply: Miracle-Gro Organic Outdoor Potting Mix
- Best for indoor mini bundle: Miracle-Gro Organic Indoor Potting Mix
- Best for premium organic mix: Miracle-Gro Performance Organics All Purpose Container Mix with Natural and Organic Ingredients
- Best for long-lasting feed: Miracle-Gro Potting Mix
- Best for peat-free eco blend: Back to the Roots 100% Organic Potting Mix (Value 12 Quart) | Premium Blend | Made in The USA
- Best for gnats-resistant mix: Miracle-Gro Indoor Potting Mix
Product Comparison: Best Miracle Gro Potting 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 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, 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 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 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 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 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 Indoor Potting Mix, Blended for a Variety of Houseplants, Feeds for up to 6 Months, 16 qt., 2-Pack
- Miracle-Gro Indoor Potting Mix feeds houseplants for up to 6 months and is designed to be less prone to gnats (contains no compost or bark, which are known to shelter fungus gnats)
- This potting mix contains coconut coir, which holds and releases water and helps soil re-wet
- Where to use: Blended for a wide variety of indoor container plants, including climbing, foliage, flowering, and tropical plants
- How to use: To use, fill a container about 1/3 full with potting mix; add more mix after placing your plant in the pot
- What’s included: This bundles includes two 16 qt. bags of Miracle-Gro Indoor Potting Mix, each able to fill one 12-inch containers (exact amount may vary based on the root ball size)
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 Miracle‑Gro Organic Indoor and Outdoor Potting Mixes?
The Indoor mix combines sphagnum peat moss, coir, and a quick‑start natural fertilizer to protect against over‑ and under‑watering, while the Outdoor mix uses responsibly sourced peat and a quick‑release fertilizer for up to two months of feeding. Indoor formulas are designed for houseplants and seed starting, whereas Outdoor blends are optimized for flowers, vegetables, herbs, and perennials in containers exposed to the elements.
Is a larger bag more cost‑effective, and how many containers will it fill?
Buying the 25 qt. Outdoor bag (B0DNG9V7DW) generally offers the best per‑quart price and can fill roughly three 10‑inch pots, while the 16 qt. bags typically fill one 12‑inch container each. Bundle packs of two 16 qt. bags give you extra volume for a modest price increase and are handy if you have several pots to fill.
Can I use the indoor mix for outdoor containers or vice‑versa?
While you can technically plant outdoors with the indoor mix, it lacks the quick‑release fertilizer and peat composition optimized for external conditions, so growth may be slower. Conversely, the outdoor mix may retain too much moisture for indoor plants, increasing the risk of root rot, so it’s best to stick with the intended indoor formula for houseplants.
How does Miracle‑Gro Performance Organics All Purpose Container Mix compare to the standard Organic Indoor mix?
Performance Organics (B0F84Y9KDZ) uses aged compost and organic ingredients to provide continuous nutrition for up to three months, whereas the standard Indoor mix relies on a quick‑start natural fertilizer for about two months. Performance Organics is OMRI‑listed and marketed for both indoor and outdoor use, offering a broader nutrient profile, but it may be slightly pricier per quart.
What should I look for in a peat‑free, organic option?
The Back to the Roots 100 % Organic Potting Mix (B0CMSLHLWZ) is peat‑free, made from upcycled plant material and wood fines, and includes yucca extract for moisture control and dolomitic limestone for pH balance. This blend is ideal for environmentally conscious gardeners who want a fully organic, American‑made product without the carbon impact of peat extraction.
Which product helps reduce fungus gnats in indoor pots?
Miracle‑Gro Indoor Potting Mix (B09YLMPYQY) is formulated without compost or bark, which are common habitats for fungus gnats, and includes coconut coir to improve water retention while minimizing gnat attraction. This makes it a good choice for growers who have struggled with gnat infestations in the past.
How do the bundled versions affect value and storage?
Bundled packs, such as the two‑bag Indoor mix (B0DQZHG1J7) or Outdoor mix (B0DQW7RJ53), provide a small discount per bag and reduce packaging waste, but they require more storage space. If you have limited room, buying a single 16 qt. bag may be more convenient, though the per‑bag cost will be slightly higher.
What factors should I consider when choosing a potting mix for seed starting versus mature plants?
For seed starting, a lightweight, well‑aerated mix with consistent moisture retention—like the Indoor mix’s coir and peat blend—is ideal to promote germination. Mature plants benefit from a mix with added fertilizer and longer‑lasting nutrients, such as the Outdoor mix’s quick‑release fertilizer or the Performance Organics blend, which support sustained growth and flowering.