Comparison: Best Organic Miracle Gro Potting Mix (Updated | Nov 11th)
If you’re on the hunt for the best organic Miracle-Gro potting mix, you’re not alone—gardeners everywhere are swapping synthetic blends for cleaner, earth-friendly options. But with so many choices, how do you know which one truly delivers lush growth without the chemicals? Spoiler: not all “organic” mixes are created equal. Let’s break down the top contenders so you can pick the perfect potting partner for your green babies.
- Best for quick-release feed: Miracle-Gro Organic Outdoor Potting Mix
- Best for watering balance: Miracle-Gro Organic Indoor Potting Mix
- Best for double indoor pack: Miracle-Gro Organic Indoor Potting Mix
- Best for outdoor bulk bundle: Miracle-Gro Organic Outdoor Potting Mix
- Best for big outdoor mix: Miracle-Gro Organic Outdoor Potting Mix
- Best for mini indoor pack: Miracle-Gro Organic Indoor Potting Mix
- Best for twice-size growth: Miracle-Gro Potting Mix
- Best for organic power mix: Miracle-Gro Performance Organics All Purpose Container Mix with Natural and Organic Ingredients
- 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 Organic Miracle Gro Potting Mix
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 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 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
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 the organic indoor and outdoor Miracle‑Gro mixes?
The indoor mix contains sphagnum peat moss, coir, and a quick‑start natural fertilizer designed to prevent over‑ and under‑watering, while the outdoor mix uses responsibly sourced peat and a quick‑release fertilizer that feeds for up to two months. Indoor formulas are optimized for houseplants and seed starting, whereas outdoor blends are suited for flowers, vegetables, herbs, and perennials in containers. Both provide organic nutrition, but the moisture‑retention components differ to match indoor versus outdoor conditions.
Is buying a multi‑bag bundle a better value than a single 16‑qt bag?
Bundles usually include two 16‑qt bags for roughly the price of one, reducing the cost per quart and ensuring you have enough mix for multiple containers. For larger projects, the 25‑qt outdoor bag also offers a lower unit price and can fill three 10‑inch pots. Consider the size of your garden and how many containers you plan to fill before deciding.
How does Miracle‑Gro Performance Organics compare to the standard organic mixes?
Performance Organics uses aged compost and OMRI‑listed ingredients, delivering continuous nutrition for up to three months, whereas the standard organic mixes rely on quick‑release fertilizers that last about two months. Performance Organics is marketed as an all‑purpose blend for both indoor and outdoor use, while the other mixes are split into indoor‑specific and outdoor‑specific formulas. If you prefer a longer feeding window and a certified organic label, Performance Organics may be worth the extra cost.
Can I use the indoor potting mix for outdoor containers?
While the indoor mix will work outdoors, it lacks the quick‑release fertilizer that benefits outdoor plants and may retain moisture differently in open conditions. Outdoor mixes are formulated to handle temperature fluctuations and provide nutrients that support flowering and fruiting. For best results, match the mix to the environment where the plant will grow.
What should I look for in a peat‑free organic potting mix?
A peat‑free mix, like Back to the Roots, uses upcycled plant material and wood fines, reducing carbon footprint and avoiding peat extraction. Look for added moisture‑control agents such as yucca extract and pH‑balancing components like dolomitic limestone. These blends are versatile for herbs, veggies, and flowers, but may have different water‑holding characteristics than peat‑based mixes.
How do the quick‑release fertilizers in the outdoor mixes affect feeding frequency?
Quick‑release fertilizers dissolve rapidly, providing an immediate nutrient boost that typically lasts about two months before a refill is needed. This means you’ll need to repot or supplement with additional fertilizer after that period to maintain vigorous growth. If you prefer less frequent feeding, consider mixes with slower‑release or organic compost components.
Is the Miracle‑Gro Indoor Potting Mix less prone to fungus gnats?
Yes, the indoor mix is formulated without compost or bark, which are common habitats for fungus gnats, and includes coconut coir that helps regulate moisture. This reduces the likelihood of gnat infestations compared to traditional soil blends. However, over‑watering can still create conditions for gnats, so follow the recommended watering guidelines.
Which mix offers the best value for large outdoor container gardens?
The 25‑qt outdoor bag provides the lowest cost per volume and can fill three 10‑inch containers, making it ideal for larger garden projects. Bundles of two 16‑qt bags also deliver savings and are convenient for multiple smaller pots. Evaluate the total container size you need to fill and choose the package that minimizes waste while meeting your planting needs.