Comparison: Best Miracle Gro Organic Potting Soil Ph (Updated | Nov 11th)
But with so many options out there, how do you know which one delivers real results? In this comparison, we’ll break down the top contenders, test their pH levels, and see which formula gives your veggies, flowers, and herbs the nutrient boost they crave—naturally. Let’s dig into what makes each blend unique and find the one worth your garden space.
- Best for quick release: Miracle-Gro Organic Outdoor Potting Mix
- Best for water balance: Miracle-Gro Organic Indoor Potting Mix
- Best for dual bag value: Miracle-Gro Organic Indoor Potting Mix
- Best for compact twin pack: Miracle-Gro Organic Indoor Potting Mix
- Best for outdoor twin pack: Miracle-Gro Organic Outdoor Potting Mix
- Best for large volume: Miracle-Gro Organic Outdoor Potting Mix
- Best for premium organic: 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 six-month feed: Miracle-Gro Potting Mix
- Best for gnats resistant: Miracle-Gro Houseplant Potting Mix: Fertilized
Product Comparison: Best Miracle Gro Organic Potting Soil Ph
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 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, 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 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 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 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
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 the right Miracle‑Gro organic potting mix for indoor vs. outdoor use?
Look at the product label: indoor mixes contain sphagnum peat moss, coir, and a quick‑release fertilizer that helps prevent over‑ and under‑watering, while outdoor mixes use responsibly sourced peat and are formulated for harsher weather conditions. Indoor mixes are ideal for houseplants, herbs, and seed starting, whereas outdoor mixes are better for flowers, vegetables, and perennials in containers exposed to sun and rain.
What pH range do these organic mixes provide, and why does it matter?
Most Miracle‑Gro organic mixes have a near‑neutral pH (around 6.5‑7.0), which is suitable for a wide variety of plants and helps nutrients stay available. Maintaining the proper pH prevents nutrient lockout and promotes healthy root development, especially important for sensitive herbs and vegetables.
Is it worth buying a larger bag or a bundle of two bags?
Buying a bundle (two 16‑qt bags) often reduces the per‑quart cost and ensures you have enough mix for multiple containers, which is economical for larger gardens. If you only have a few small pots, a single 4‑qt or 8‑qt bag may be more convenient and reduce waste.
How does the Miracle‑Gro Performance Organics All Purpose Container Mix differ from the standard organic mixes?
Performance Organics includes aged compost and OMRI‑listed ingredients that supply continuous nutrition for up to three months, offering a higher nutrient density than the basic organic mixes. It’s designed for both indoor and outdoor containers and promises up to twice the harvest compared with unfed plants.
What are the benefits of a peat‑free organic mix like Back to the Roots?
Back to the Roots uses upcycled plant material and wood fines, providing a sustainable alternative with better moisture control and pH balance thanks to yucca extract and dolomitic limestone. This mix is 100 % organic, peat‑free, and reduces carbon footprint while still supporting healthy plant growth.
Can I use the indoor mix for seed starting, and does it need extra fertilizer?
Yes, the indoor mix is suitable for seed starting because it contains a balanced blend of peat moss, coir, and a gentle natural fertilizer that promotes germination. You generally don’t need additional fertilizer until the seedlings have developed true leaves, at which point regular feeding can enhance growth.
How much soil do I need for a typical 12‑inch container?
A 16‑qt bag of either indoor or outdoor Miracle‑Gro organic mix typically fills one 12‑inch pot, though the exact amount may vary with root ball size. For larger projects, a 25‑qt bag can cover three 10‑inch containers, providing a convenient way to scale up without buying multiple smaller bags.
What value‑added features should I look for when comparing potting soils?
Consider features such as quick‑release natural fertilizer, moisture‑control additives like perlite or coir, and certifications like OMRI listing for organic standards. Bundles that include multiple bags can offer cost savings, while mixes with added nutrients or pest‑deterring properties reduce the need for supplemental products.