Comparison: Best Miracle Plant Soil (Updated | Nov 11th)
If you’ve ever wondered why some houseplants thrive while others barely survive, the secret might be hiding right under your nose—your soil. Not all potting mixes are created equal, and when it comes to miracle plant soil, the right blend can mean the difference between lush, vibrant growth and a sad, drooping leaf. In this comparison, we’ll break down the top contenders, weighing ingredients, drainage, and real plant results—so you can skip the guesswork and give your green friends the foundation they truly deserve.
- Best for eco outdoor: Miracle-Gro Organic Outdoor Potting Mix
- Best for gnat-resistant indoor: Miracle-Gro Houseplant Potting Mix: Fertilized
- Best for moisture control: Miracle-Gro Moisture Control Potting Mix
- Best for growth booster: Miracle-Gro Potting Mix
- Best for organic indoor: Miracle-Gro Organic Indoor Potting Mix
- Best for hydrangea specialist: GARDENWISE Slow Release Hydrangea Fertilizer with Iron & Sulfur – Indoor & Outdoor Soil Acidifier for Miracle Growth (12 oz)
- Best for fast-drain succulent: Miracle-Gro Cactus
- Best for bulk organic outdoor: Miracle-Gro Organic Outdoor Potting Mix
- Best for coir indoor mix: Miracle-Gro Indoor Potting Mix
- Best for gnat-resistant houseplant: Miracle-Gro Houseplant Potting Mix – Fertilized Soil
Product Comparison: Best Miracle Plant Soil
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 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
Miracle-Gro Moisture Control Potting Mix, For Container Plants, Protects against Over- and Under-Watering, 8 qt., 2-Pack
- Miracle-Gro Moisture Control Potting Mix feeds plants for up to 6 months and Grows Plants Twice As Big! (vs unfed plants)
- This potting medium protects against over and under watering; also absorbs up to 33% more water than basic potting soil* with exclusive AquaCoir Formula (*soil that does not contain sphagnum peat moss, coir, and wetting agent)
- Use this gardening product with all types of container plants, including flowers, vegetables, annuals, perennials, and shrubs
- To use this potting soil, fill a container about 1/3 full with potting mix; place your plant in the pot and cover with more mix
- This bundle comes with two 8 qt. bags of Miracle-Gro Moisture Control Potting Mix; each fills two 8-inch containers (exact amounts may vary depending 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 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)
GARDENWISE Slow Release Hydrangea Fertilizer with Iron & Sulfur – Indoor & Outdoor Soil Acidifier for Miracle Growth (12 oz)
- 🌸 SPECTACULAR BLOOMS ALL YEAR: Promote vivid flowers with our balanced 8-4-8 formula, enriched with iron and sulfur for enhanced soil acidity and brighter, healthier blooms.
- 🌱 TAILORED FOR ACID-LOVING PLANTS: Ideal for hydrangeas, azaleas, camellias, and magnolias, providing essential nutrients for lush foliage and robust health.
- 🛠️ EFFORTLESS APPLICATION: Designed for gardeners of all levels—simply sprinkle, water, and watch your garden flourish with minimal effort.
- 💧 LONG-LASTING NOURISHMENT: Slow-release formula reduces application frequency while delivering steady nutrients for up to three months.
- 🏡 VERSATILE AND RELIABLE: Perfect for indoor and outdoor use, ensuring your garden thrives in any season and any climate.
Miracle-Gro Cactus, Palm and Citrus Potting Mix, for Indoor or Outdoor Potted Plants, Great for Succulents, 8 qt., 2-Pack
- Miracle-Gro Cactus, Palm & Citrus Potting Mix features a fast-draining formula and is enriched with Miracle-Gro Plant Food
- This fast-draining formula is blended to help promote successful growing of cacti, potted palms, citrus, and other succulents
- This cactus potting mix is designed for indoor and outdoor container plants, including cacti, palm plants, citrus trees, and succulents
- To use this succulent soil mix, fill a pot with a drainage hole 1/3 full of mix, top with more mix after placing plant, and press lightly
- This bundle includes two 8 qt. bags of Miracle-Gro Cactus, Palm & Citrus Potting Mix, each able to fill two 8-inch containers (amounts may vary based on root ball size)
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 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)
Miracle-Gro Houseplant Potting Mix – Fertilized Soil, Designed to be Less Prone to Gnats, 4 qt. (2-Pack)
- Growing indoors is easy under the right conditions; Miracle-Gro Houseplant Potting Mix combines key elements plants need to thrive
- This indoor plant soil is less prone to gnats thanks to the combination of perlite, sphagnum and peat moss
- Recommended for growing beautiful, indoor houseplant varieties like pothos, spider plants, monstera, philodendron, english ivy, and more
- Certified by the Mulch & Soil Council as in compliance with industry standards
- Bundle includes two bags of Miracle-Gro Houseplant Potting Mix
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 should I consider when choosing a potting mix for indoor houseplants?
Look for a mix that balances water retention with drainage, contains ingredients like perlite or coconut coir, and is low in organic matter that can attract fungus gnats. Products such as Miracle-Gro Houseplant Potting Mix and Indoor Potting Mix are formulated to be less prone to gnats, while the Organic Indoor Mix adds a natural fertilizer for extra nutrition. Also check if the mix includes a quick‑release fertilizer if you prefer fewer feeding intervals.
Which Miracle‑Gro mix provides the longest feeding period?
The Moisture Control Potting Mix and the standard Miracle‑Gro Potting Mix both claim to feed plants for up to six months, making them the longest‑lasting options. In contrast, the Organic Outdoor and Indoor mixes feed for about two months, and the Houseplant Mix is designed for regular feeding after 30 days. Choose the six‑month formulas if you want to reduce the frequency of supplemental feeding.
How do the organic mixes differ from the conventional ones?
Organic mixes, like the Organic Outdoor and Organic Indoor Potting Mixes, use responsibly sourced peat or sphagnum peat moss and include a natural, quick‑release fertilizer without synthetic chemicals. Conventional mixes such as Moisture Control and the standard Potting Mix rely on synthetic nutrients and proprietary formulas like AquaCoir for water management. The organic options are ideal for gardeners who prioritize natural ingredients, while the conventional mixes often deliver faster growth and higher water‑holding capacity.
Is there a potting mix specifically formulated for succulents, cacti, or citrus?
Yes, the Miracle‑Gro Cactus, Palm & Citrus Potting Mix features a fast‑draining blend enriched with plant food, making it ideal for drought‑tolerant plants and citrus trees. Its formulation promotes quick drainage to prevent root rot, which is crucial for succulents and cacti. If you grow these plants indoors or outdoors, this mix offers the best balance of aeration and nutrition.
What are the advantages of the Moisture Control Potting Mix compared to regular potting soil?
Moisture Control uses an AquaCoir formula that absorbs up to 33% more water than standard mixes, helping prevent both over‑ and under‑watering. It also includes a six‑month feeding schedule and claims to grow plants twice as big as unfed plants. This makes it a good choice for busy gardeners who want consistent moisture and growth without constant monitoring.
How do the bag sizes affect how many containers I can fill?
Bag capacity varies: a 4‑qt Houseplant Mix fills an 8‑inch pot, a 16‑qt bag (Organic Outdoor, Organic Indoor, Indoor, or standard Potting Mix) typically fills one 12‑inch container, while a 25‑qt Organic Outdoor bag can fill three 10‑inch pots. The two‑bag bundles (e.g., two 8‑qt Moisture Control or Cactus Mix bags) each fill two 8‑inch containers, effectively covering four small pots. Match the bag size to the number and size of containers you plan to use.
Which mix offers the best value for large outdoor container gardens?
For large outdoor projects, the 25‑qt Organic Outdoor Potting Mix provides the most soil per dollar and covers three 10‑inch containers, making it cost‑effective for extensive planting. The standard Miracle‑Gro Potting Mix also comes in a two‑bag 16‑qt bundle that fills two 12‑inch containers, offering good value with a six‑month feeding schedule. Compare the price per cubic foot and the included fertilizer duration to determine the most economical option for your garden size.