Comparison: Best Greenspade Potting Soil (Updated | Nov 11th)
When it comes to the **best greenspade potting soil**, not all bags are created equal. We’ve dug deep (pun intended) to compare the top options, testing for moisture retention, nutrient content, and root support. Let’s find out which blend truly earns its place in your pots.
- Best for organic outdoor boost: Miracle-Gro Organic Outdoor Potting Mix
- Best for gnat-resistant indoor: Miracle-Gro Houseplant Potting Mix: Fertilized
- Best for peat-free all-purpose: Back to the Roots 100% Organic Potting Mix (Value 12 Quart) | Premium Blend | Made in The USA
- Best for fast-drain succulent: Miracle-Gro Cactus
- Best for aquacoir moisture: Miracle-Gro Moisture Control Potting Mix
- Best for six-month growth: Miracle-Gro Potting Mix
- Best for balanced indoor organic: Miracle-Gro Organic Indoor Potting Mix
- Best for mycorrhizae indoor boost: Back to the Roots 100% Organic Indoor Potting Mix (Value 12 Quart) | Promotes Healthy Houseplant Growth| Made in The USA
- Best for bulk organic outdoor: Miracle-Gro Organic Outdoor Potting Mix
- Best for rapid seed starter: Miracle-Gro Seed Starting Potting Mix
Product Comparison: Best Greenspade Potting 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
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 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 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)
Back to the Roots 100% Organic Indoor Potting Mix (Value 12 Quart) | Promotes Healthy Houseplant Growth| Made in The USA
- FORMULATED FOR INDOOR USE: Our Potting Mix contains organic yucca extract that aids in retaining moisture in the soil whichs keeps your indoor plants happy and healthy
- ROOT-BOOSTING MYCORRHIZAE: This beneficial soil component provides your plants with a natural, organic way to boost their root development and nutrient uptake
- ORGANIC AND PEAT-FREE: Our indoor potting mix helps reduce greenhouse emissions and environmental impact, making it a responsible choice for conscious consumers
- BALANCING DOLOMITIC LIMESTONE: Balances the alkalinity and acidity levels of the soil, which ensures that your plants receive the necessary nutrients from the potting mix to grow healthy and strong
- SAFE FOR PETS AND PEOPLE: Made without bark or compost, this potting mix is less prone to indoor gnats and pests, making it a worry-free option for your indoor gardening needs
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 Seed Starting Potting Mix, 8 Quarts (Pack of 2), For Use in Containers
- Specially formulated for fast root development
- Enriched with Miracle-Gro Plant Food
- Excellent for starting cuttings
- Use when starting from seed and with leaf, stem or root cuttings
- This bundle includes two 8 qt. bags of Miracle-Gro Seed Starting 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
How do I choose between organic and non‑organic potting mixes?
Organic mixes use natural fertilizers and often avoid peat, which appeals to environmentally‑conscious gardeners. Non‑organic options like standard Miracle‑Gro provide quick‑release nutrients that can boost growth faster but may rely on synthetic ingredients. Consider your plant type, soil health goals, and any certification preferences when deciding.
What are the key differences between Miracle‑Gro Organic Outdoor Mix and Back to the Roots Organic Indoor Mix?
The Miracle‑Gro Outdoor mix contains a quick‑release natural fertilizer that feeds plants for up to two months and is formulated for outdoor containers, while Back to the Roots Indoor mix is peat‑free, uses upcycled plant material, and includes yucca extract for moisture retention. The outdoor version emphasizes rapid nutrient availability, whereas the indoor blend focuses on a lighter carbon footprint and balanced pH. Choose based on where you’ll be planting and whether you prioritize organic certifications or sustainability.
Which mix is best for containers that need extra moisture control?
Miracle‑Gro Moisture Control Potting Mix features an AquaCoir formula that absorbs up to 33% more water than standard soils, making it ideal for plants prone to over‑ or under‑watering. Back to the Roots Indoor Mix also offers good moisture retention thanks to yucca extract, but its primary benefit is a peat‑free composition. For the most aggressive water‑management, the Moisture Control blend is the top choice.
How does the Cactus, Palm & Citrus mix differ from the regular Miracle‑Gro Potting Mix?
The Cactus, Palm & Citrus mix is formulated with fast‑draining particles and added plant food specifically for succulents, palms, and citrus trees, reducing the risk of root rot. Regular Miracle‑Gro Potting Mix is a more general‑purpose blend that retains more moisture and includes a broader nutrient profile for flowers, vegetables, and herbs. Use the cactus blend for drought‑tolerant plants and the regular mix for moisture‑loving species.
Is the Back to the Roots peat‑free blend worth the price compared to Miracle‑Gro’s peat‑based products?
Back to the Roots offers a 100% organic, peat‑free formula made from upcycled plant matter, which lowers its environmental impact and provides balanced pH with dolomitic limestone. Miracle‑Gro’s peat‑based mixes often include quick‑release fertilizers that can produce faster growth but rely on imported peat. If sustainability and a lighter carbon footprint are priorities, the higher price of Back to the Roots can be justified.
What size bag should I buy for a 12‑inch pot?
A 16‑quart bag of most mixes (Miracle‑Gro Organic Outdoor, Organic Indoor, or standard Potting Mix) typically fills one 12‑inch container, though exact coverage may vary with root ball size. For larger projects, a 25‑quart bag of the Outdoor Organic mix can fill three 10‑inch pots, which is comparable. Choose the bag size that matches the number of containers you plan to fill.
How important is the built‑in fertilizer and how long does it last?
Built‑in fertilizers provide an immediate nutrient boost, helping seedlings and transplants establish quickly. Most Miracle‑Gro blends claim feeding periods of two months (organic outdoor) to six months (Moisture Control and standard Potting Mix). After that window, supplemental feeding with Miracle‑Gro plant food will maintain optimal growth.
Are any of these mixes better for preventing gnats or pests?
The Miracle‑Gro Houseplant Potting Mix combines perlite, sphagnum, and peat moss in a ratio that makes it less attractive to fungus gnats. Back to the Roots Indoor Mix is formulated without bark or compost, also reducing gnat habitats. For the lowest pest risk, select either of these two mixes and keep soil surface dry when possible.