Comparison: Best Miracle Gro Organic Potting (Updated | Nov 11th)
If you’ve ever wondered which Miracle-Gro organic potting mix truly lives up to the “miracle” name, you’re not alone. We’ve dug into the details—literally—testing and comparing the top contenders to see which one delivers real results. Whether you’re growing herbs on a windowsill or tomatoes in a raised bed, we’ll help you choose the best organic potting mix that’s both effective and easy to use. Let’s find your perfect soil match.
- Best for quick-release feed: Miracle-Gro Organic Outdoor Potting Mix
- Best for watering protection: Miracle-Gro Organic Indoor Potting Mix
- Best for outdoor mix duo: Miracle-Gro Organic Outdoor Potting Mix
- Best for indoor mix duo: Miracle-Gro Organic Indoor Potting Mix
- Best for compact indoor pack: Miracle-Gro Organic Indoor Potting Mix
- Best for large outdoor supply: Miracle-Gro Organic Outdoor Potting Mix
- Best for triple-month nutrition: Miracle-Gro Performance Organics All Purpose Container Mix with Natural and Organic Ingredients
- Best for six-month feed: Miracle-Gro Potting Mix
- Best for peat-free blend: Back to the Roots 100% Organic Potting Mix (Value 12 Quart) | Premium Blend | Made in The USA
- Best for gnat-resistant mix: Miracle-Gro Indoor Potting Mix
Product Comparison: Best Miracle Gro Organic Potting
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 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, 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 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 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 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
How do I choose between the indoor and outdoor organic potting mixes?
Select the indoor mix when growing houseplants, herbs, or seedlings that need protection from over‑ and under‑watering; it contains sphagnum peat moss, coir, and a quick‑start fertilizer. Choose the outdoor mix for garden vegetables, flowers, and perennials in containers exposed to the elements, as it’s formulated with peat and a longer‑lasting fertilizer. Both are organic, but the indoor blend offers better moisture regulation for confined spaces.
What are the main differences between single‑bag and bundle options?
Single‑bag packages (usually 16 qt.) are ideal for a single 12‑inch pot or for trying the product first. Bundle packs, such as two 16 qt. bags or a 25 qt. bag, provide a lower cost per quart and are better suited for multiple containers or larger garden projects. The soil composition is identical; you only save money and reduce packaging waste with the larger bundles.
How does the quick‑release natural fertilizer in Miracle‑Gro Organic mixes compare to the 3‑month nutrition in Performance Organics?
The Organic mixes release nutrients for up to two months, giving a fast boost that’s great for new plantings. Performance Organics extends feeding to about three months, offering a longer‑term supply for continuous growth. If you prefer fewer re‑feeds, Performance Organics may be more convenient, while the Organic line provides a quicker start for seedlings.
Is the peat used in Miracle‑Gro organic mixes sustainably sourced?
Yes, Miracle‑Gro states that 100 % of the peat in its organic mixes comes from certified producers who follow responsible harvesting practices. This certification helps ensure that peat extraction does not deplete sensitive ecosystems. However, if you are looking to avoid peat entirely, there are peat‑free alternatives available.
Can I use the indoor mix for seed starting and the outdoor mix for vegetables?
Absolutely. The indoor mix’s lightweight, well‑draining formula is ideal for seed trays and delicate seedlings, while the outdoor mix’s richer texture supports the deeper root systems of vegetables and herbs. Both mixes contain a quick‑release fertilizer, which gives seedlings an early nutrient boost.
How does the Back to the Roots peat‑free mix compare to Miracle‑Gro’s peat‑based mixes in moisture control?
Back to the Roots uses upcycled plant material, wood fines, and yucca extract to improve moisture retention and prevent over‑watering, offering a peat‑free, lower‑carbon option. Miracle‑Gro’s peat blends naturally hold water but rely on peat, which can retain more moisture than some growers prefer. If precise moisture management is a priority, the peat‑free mix may give you a slight edge.
What bag size should I buy for a 12‑inch container versus larger containers?
A 16‑qt. bag of either indoor or outdoor mix typically fills one 12‑inch pot, making it the standard choice for average container gardening. For larger projects, the 25‑qt. outdoor bag can fill three 10‑inch containers, while the 8‑qt. indoor bundles are suited for two 8‑inch pots. Match the bag volume to the number and size of containers you plan to fill.
Are there cost‑benefit advantages to buying the larger 25‑qt. outdoor bag?
The 25‑qt. bag offers a lower price per quart compared with multiple 16‑qt. bags, delivering savings for gardeners who need to fill several large containers. It also reduces packaging waste and the number of trips to restock. If you have a sizable outdoor garden, the larger bag is the most economical option.