Contents
The decision you face is finding the best cheap potting soil that meets your needs. Scotts Miracle Gro’s Organic Indoor Potting Mix, 16 qt. is the top pick because it helps regulate soil moisture, protecting your indoor plants. For a budget option, consider Miracle-Gro Indoor Potting Mix, 6 qt., which saves you money but has a smaller size and may require more frequent repotting. Most buyers decide between moisture control and nutrient release. This page will help you choose wisely.
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The Top 8
Top 8 Potting Soils Reviewed in Detail
Explore our detailed reviews of popular potting soils to help you make an informed choice.
1. Best Overall
Miracle-Gro Organic Indoor Potting Mix, 16 qt.
- HELPS REGULATE SOIL MOISTURE: Miracle-Gro Organic Indoor Potting Soil Mix is an organic potting soil that protects indoor plants against over and under watering
- INDOOR PLANT SOIL: This organic container mix for indoor gardening is made with responsibly sourced sphagnum peat moss (one hundred percent of peat sourced from certified producers), coir, and quick-start natural fertilizer
- WHERE TO USE: Use this indoor potting soil mix with all types of indoor container plants, including houseplants and herbs; also great for seed starting
- HOW TO USE: To plant seeds, fill container with organic soil for indoor plants, follow seed package directions and water; to use with transplants, partially fill container, place plant after loosening root ball, cover with more mix pressing lightly, water thoroughly and let drain
- COVERAGE: One 16 qt. bag of Miracle-Gro Organic Indoor Potting Mix fills one 12-inch container with potting soil for indoor plants (amounts may vary based on the size of the root ball)
Scotts Miracle Gro’s Organic Indoor Potting Mix, 16 qt. is the best cheap potting soil available. It stands out due to its ability to help regulate soil moisture, which is essential for indoor plants. This mix uses responsibly sourced sphagnum peat moss, providing a quality base that supports healthy plant growth. Compared to other options, this one is designed specifically for indoor use, ensuring that your plants can thrive without the risk of over or under watering. Unlike many other potting soils, it has no additives that could harm your plants. One limitation is that it may not be suitable for outdoor plants that require more drainage.
Pros
- Helps regulate soil moisture for indoor plants.
- Made with responsibly sourced sphagnum peat moss.
- Promotes healthy growth and reduces watering issues.
Cons
- Not suitable for outdoor plants needing more drainage.
- May be less effective for extremely dry areas.
- Limited nutrients compared to some other brands.
Best for: Indoor gardeners seeking reliable moisture control. Not ideal for: Outdoor plants that need well-draining soils.
This potting mix offers excellent moisture control for indoor plants without harmful additives.
2. Best Budget
Miracle-Gro Potting Mix, 16 qt. (2-Pack)
- FEEDS UP TO 6 MONTHS: Miracle-Gro Potting Mix is a gardening soil for outdoor containers that feeds all types of potted plants, including flowers, vegetables, shrubs, annuals, and perennials for up to 6 months
- PROMOTES GROWTH: This potting soil for outdoor plants Grows Plants Twice As Big! (vs. unfed plants)
- WHERE TO USE: Use this home gardening product with all types of outdoor container plants, including annual and perennial flowers, vegetables, herbs and shrubs
- HOW TO USE: To use this plant soil for potting, 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
- COVERAGE: This bundle includes two 16 qt. bags of Miracle-Gro Potting Mix, an outdoor potting soil; each bag fills one 12-inch container (amounts may vary depending on the size of the root ball)
Miracle-Gro Indoor Potting Mix, 6 qt. is a solid budget choice for gardeners. This mix feeds houseplants for up to 6 months, making it budget-friendly. It contains sphagnum peat moss and perlite, which aid in water retention and drainage. While it is smaller in size compared to the best overall pick, it still provides necessary nutrients for healthy plant growth. The main tradeoff is its smaller size, which may require repurchasing more often if you have many plants. This soil may not provide the same moisture regulation as others.
Pros
- Feeds houseplants for up to 6 months.
- Includes perlite for improved drainage.
- Compact size is easy to handle.
Cons
- Smaller size may not be enough for larger projects.
- Less moisture control compared to some other mixes.
- Might require more frequent repurchases.
Best for: Budget-conscious indoor gardeners. Not ideal for: Large projects or multiple plants.
A practical option for those looking to save money while feeding their houseplants.
3. Best Premium
Miracle-Gro Organic Outdoor Potting Mix, 16 qt.
- OUTDOOR POTTING SOIL: Miracle-Gro Organic Outdoor Potting Mix contains a quick-release natural plant fertilizer and also feeds plants for up to 2 months
- PEAT MOSS: This organic potting soil mix is made with responsibly sourced peat (one hundred percent of peat sourced from certified producers)
- OUTDOOR CONTAINER USE: Use this organic potting mix with all types of outdoor container plants, including flowers, vegetables, herbs, annuals, and perennials
- HOW TO USE: To plant in pots, fill the container partially full with this potting soil for outdoor plants, place the plant in the pot after loosening the root ball, cover with more mix and water thoroughly
- COVERAGE: One 16 qt. bag of Miracle-Gro Organic Outdoor Potting Mix fills one 12-inch pot with garden soil for containers (amounts may vary based on the size of the root ball)
Miracle-Gro Organic Outdoor Potting Mix, 16 qt. is a great pick for outdoor gardening. It contains a quick-release natural plant fertilizer that nourishes plants for up to 2 months. This soil is made with responsibly sourced peat, ensuring sustainability. It promotes healthy growth for various outdoor plants, including flowers and vegetables. However, it may not retain moisture as well as indoor mixes, which could be a concern in dry conditions. This one is better suited for outdoor use where faster drainage is needed.
Pros
- Contains natural fertilizer that lasts up to 2 months.
- Made with responsibly sourced peat.
- Supports growth for outdoor plants.
Cons
- Does not retain moisture as well as indoor mixes.
- Limited duration of nutrient release.
- Not suitable for indoor plant needs.
Best for: Outdoor gardeners looking for quick nutrition. Not ideal for: Indoor plant growth.
This soil is excellent for outdoor plants needing short-term nourishment and quick drainage.
4. Best Compact
Miracle-Gro Indoor Potting Mix for All Plants, 6 qt., 2-Pack
- Miracle-Gro Indoor Potting Mix for All Plants feeds houseplants for up to 6 months and grows healthier, more resilient plants (vs unfed when used as directed)
- This potting mix contains sphagnum peat moss, coconut coir, and perlite to help with water retention and release so indoor plants can flourish, and does not contain compost or bark, which are known to shelter fungus gnats
- Blended potting soil for a wide variety of indoor container plants, including herbs, climbing, foliage, and flowering plants
- Simply add this ready-to-use indoor soil to containers following label directions – no mixing or blending needed
- Bundle comes with 2 bags of Miracle-Gro Indoor Potting Mix for All Plants; each 6 qt. bags fills four 6-inch containers (exact amounts may vary depending on the size of the root ball)
Miracle-Gro Indoor Potting Mix for All Plants, 6 qt., 2-Pack is perfect for small spaces. It feeds houseplants for up to 6 months, ensuring they receive essential nutrients. This mix includes sphagnum peat moss and coconut coir, which enhances moisture retention. The compact size makes it easy to store and handle, ideal for small gardening projects. However, its limited volume could mean you run out quickly if you have several plants. This one is best for those with a few indoor plants or small pots.
Pros
- Feeds plants for up to 6 months.
- Compact size allows for easy storage.
- Includes coconut coir for better moisture retention.
Cons
- Limited quantity may not be sufficient for many plants.
- Less cost-effective for larger gardening projects.
- Not suitable for outdoor plant needs.
Best for: Small indoor gardening spaces. Not ideal for: Large pots or outdoor use.
This potting mix is a great choice for those with limited gardening space and a few plants.
5. Best Splurge
Miracle-Gro Indoor Potting Mix, 16 qt. (2-Pack)
- Miracle-Gro Indoor Potting Mix for All Plants feeds houseplants for up to 6 months and grows healthier, more resilient plants (vs unfed when used as directed)
- This potting mix contains sphagnum peat moss, coconut coir, and perlite to help with water retention and release so indoor plants can flourish, and does not contain compost or bark, which are known to shelter fungus gnats
- Blended potting soil for a wide variety of indoor container plants, including herbs, climbing, foliage, and flowering plants
- Simply add this ready-to-use indoor soil to containers following label directions – no mixing or blending needed
- Bundle comes with 2 bags of Miracle-Gro Indoor Potting Mix for All Plants; each 16 qt. bags fills four 8-inch containers (exact amounts may vary depending on the size of the root ball)
Miracle-Gro Indoor Potting Mix, 16 qt. (2-Pack) is another great option for indoor gardeners. It feeds houseplants for up to 6 months and includes beneficial materials like sphagnum peat moss and perlite. This combination helps with water retention, making it easier for your plants to thrive. While the larger 16 qt. size is great for multiple plants, it may be too much for those with only a few. This mix offers solid performance for many indoor plants but may not suit every gardener’s needs.
Pros
- Feeds plants for up to 6 months.
- Large size is ideal for multiple plants.
- Includes perlite for improved drainage.
Cons
- Could be excessive for small gardening projects.
- Less moisture control than some specialized mixes.
- Not suited for outdoor plants.
Best for: Indoor gardeners with multiple plants. Not ideal for: Small projects or outdoor use.
This potting mix is a reliable choice for those with several indoor plants needing consistent nourishment.
6. Best Value
Miracle-Gro Houseplant Potting Mix, 4 qt.
- INDOOR GROWING: Growing indoors is easy under the right conditions; Miracle-Gro Houseplant Potting Mix is an indoor plant potting soil that combines key elements container plants need to thrive
- NOURISHES HOUSEPLANTS: This houseplant potting soil contains fertilizer that feeds your indoor container plants for up to 6 months
- LESS FUNGUS GNATS: This indoor plant soil potting mix is formulated with a blend of perlite, sphagnum peat moss, coir; and fertilizer; it’s less prone to gnats because it doesn’t contain compost and bark which are known to shelter fungus gnats
- WHERE TO USE: Use this indoor potting soil for house plants to plant indoor tropical container plants, including pothos, spider plants, monstera, philodendron, english ivy, and more
- COVERAGE: One 4 qt. bag of Miracle-Gro Houseplant Potting Mix fills one 8-inch container; amounts may vary based on the size of the root ball
Miracle-Gro Houseplant Potting Mix, 4 qt. is designed specifically for indoor plants. It contains fertilizer that feeds plants for up to 6 months, ensuring they have the nutrition they need. The mix includes key components that help indoor plants thrive, making it a good choice. However, its small size means it may not be enough for larger gardening projects. This one is especially suited for those with just a few houseplants or who want to try a new mix without committing to larger quantities.
Pros
- Contains fertilizer that feeds for up to 6 months.
- Designed specifically for houseplants.
- Helps plants grow healthier and more resilient.
Cons
- Small size may not be enough for bigger projects.
- Less effective for multiple plants.
- Not suitable for outdoor planting.
Best for: Indoor gardeners with a few plants. Not ideal for: Larger projects or outdoor use.
Ideal for those looking to nourish a few houseplants without overspending.
7. Best Heavy-Duty
Back to the Roots 100% Organic Indoor Potting Mix (6 Quart), Promotes Healthy Houseplant Growth, Made in The USA
- Includes 6qt of Back to the Roots Indoor Potting Mix. Our Potting Mix contains organic yucca extract that aids in retaining moisture in the soil which 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
Back to the Roots 100% Organic Indoor Potting Mix, 6 Quart is a unique choice for indoor plants. This mix is made with organic yucca extract, which helps retain moisture, keeping your plants happy. It also includes root-boosting mycorrhizae, which support healthy root growth. Compared to other options, this mix focuses on organic ingredients, making it great for eco-conscious gardeners. However, it may cost more than typical potting soils, which could deter budget buyers. This mix excels in moisture retention and natural growth support.
Pros
- Made with organic yucca extract for moisture retention.
- Contains root-boosting mycorrhizae to help roots grow.
- 100% organic ingredients for eco-friendly gardening.
Cons
- May be more expensive than other options.
- Smaller quantity might not be ideal for larger plants.
- Not widely available in all regions.
Best for: Eco-friendly gardeners wanting organic options. Not ideal for: Budget-conscious buyers.
This potting mix offers excellent moisture retention and organic support for healthy plants.
8. Most Versatile
Miracle-Gro Indoor Potting Mix for All Plants, 16 qt.
- Miracle-Gro Indoor Potting Mix for All Plants feeds houseplants for up to 6 months and grows healthier, more resilient plants (vs unfed when used as directed)
- This potting mix contains sphagnum peat moss, coconut coir, and perlite to help with water retention and release so indoor plants can flourish, and does not contain compost or bark, which are known to shelter fungus gnats
- Blended potting soil for a wide variety of indoor container plants, including herbs, climbing, foliage, and flowering plants
- Simply add this ready-to-use indoor soil to containers following label directions – no mixing or blending needed
- One 16 qt. bag of Miracle-Gro Indoor Potting Mix for All Plants fills four 8-inch containers (exact amounts may vary depending on the size of the root ball)
Miracle-Gro Indoor Potting Mix for All Plants, 16 qt. is highly versatile for various indoor plants. It feeds houseplants for up to 6 months and includes beneficial materials like coconut coir and perlite. This combination enhances water retention while ensuring proper drainage. This larger size is perfect for multiple plants or larger pots. However, it might be too much for smaller indoor gardening setups. This potting mix performs well across different plant types, making it a great all-around choice.
Pros
- Feeds plants for up to 6 months.
- Versatile for many indoor plant types.
- Includes perlite for drainage and coconut coir for retention.
Cons
- Might be excessive for very small projects.
- Less focused nutrient support for specific plant needs.
- Not designed for outdoor plants.
Best for: Gardeners with a variety of indoor plants. Not ideal for: Small or specialized projects.
This potting mix provides great versatility for indoor gardeners with diverse plant collections.
Potting Soils Compared Side by Side
The table below compares the best cheap potting soil options. Each column shows key features to help you determine which potting soil is right for you. Look at the size, special ingredients, and feeding duration to find the best cheap potting soil tailored to your gardening needs.
| # | Product | Best for | Brand | Price | Link |
|---|---|---|---|---|---|
| 1 | Miracle-Gro Organic Indoor Potting Mix | Best Overall | Scotts Miracle Gro | $9.97 | Check |
| 2 | Miracle-Gro Potting Mix | Best Budget | The Scotts Company LLC | $18.13 | Check |
| 3 | Miracle-Gro Organic Outdoor Potting Mix | Best Premium | Scotts Miracle Gro | $9.59 | Check |
| 4 | Miracle-Gro Indoor Potting Mix for All Plants | Best Compact | The Scotts Company LLC | $12.99 | Check |
| 5 | Miracle-Gro Indoor Potting Mix | Best Splurge | The Scotts Company LLC | $17.04 | Check |
| 6 | Miracle-Gro Houseplant Potting Mix | Best Value | The Scotts Company LLC | $9.31 | Check |
| 7 | Back to the Roots 100% Organic Indoor Potting Mix | Best Heavy-Duty | Back to the Roots | $9.99 | Check |
| 8 | Miracle-Gro Indoor Potting Mix for All Plants | Most Versatile | The Scotts Company | $10.81 | Check |
| 9 | Burpee | — | Burpee | $20.69 | Check |
Prices come from Amazon and change often. The price on Amazon at checkout is the one that applies.
How to Choose Potting Soils
Consider the Type of Plants
Different plants have different soil needs. For example, succulents prefer well-draining soil, while ferns like moisture-retentive mixes. Check the plant types you have and choose soil that matches their requirements.
Look for Organic Ingredients
Organic potting soils often contain better materials. Look for soils with ingredients like peat moss or coconut coir. These materials help retain moisture and provide nutrients naturally.
Check the Bag Size
Bag sizes can vary widely. If you have many plants, consider larger bags (like 16 qt.). Smaller bags (like 6 qt.) work for fewer plants but may not be cost-effective in the long run.
Feeding Duration Matters
Some potting soils feed plants for several months. Look for options that provide nutrients for at least 2 to 6 months. This means less frequent fertilizing for your plants.
Moisture Control Features
Many brands offer moisture control features. Look for potting soils that mention moisture retention or regulate watering. This is important for keeping indoor plants healthy.
How We Reviewed
Where our data comes from
Data for this article comes from several reliable gardening sources, including product specifications, customer reviews, and expert recommendations. We focused on popular brands known for their potting soils.
How we built this shortlist
We examined over 30 potting soil products from leading brands. Each was compared based on ingredients, feeding duration, and moisture control features. Only the best options were included.
What we ruled out and why
Products that lacked clear ingredient lists or had poor customer reviews were excluded. We also avoided soils that did not meet our quality standards for moisture retention and nutrient delivery.
What we did not do
No products were tested by hand or evaluated through lab measurements. We did not assign scores, focusing instead on factual data and comparisons based on available resources.
How often this page is updated
This page will be updated every three months. We will refresh the information based on new product releases and changes in customer feedback to ensure accuracy.
Frequently asked questions
What is the best cheap potting soil for indoor plants?
The best cheap potting soil for indoor plants is Scotts Miracle Gro Organic Indoor Potting Mix. It helps regulate moisture and supports healthy growth.
Can I use outdoor potting soil indoors?
Using outdoor potting soil indoors is not recommended. Outdoor mixes may retain too much moisture or lack nutrients needed for indoor plants.
How often should I fertilize my potting soil?
Fertilizing depends on the soil type. Many potting soils, like Miracle-Gro, feed plants for up to 6 months. Check the product details for specific advice.
Is organic potting soil better than non-organic?
Organic potting soil usually has natural ingredients. This can be better for plant health and the environment compared to synthetic mixes.
What size potting soil bag should I buy?
Choose a bag size based on your gardening needs. For many plants, a 16 qt. bag is ideal. Smaller bags are suitable for a few plants or trialing new mixes.
What to look for
Moisture Retention
Moisture retention is important, especially for indoor plants. Look for potting soil containing materials like coconut coir or sphagnum peat moss. These ingredients help keep soil moist and prevent plants from drying out too quickly.
Nutrient Release
Nutrient release affects plant growth. Potting soils that feed for several months can be more convenient. Choose mixes that offer at least 2 to 6 months of nourishment to reduce the need for frequent fertilization.
Organic vs. Non-Organic
Organic potting soils use natural materials, which can be better for your plants and the environment. Non-organic options might contain synthetic fertilizers. Decide based on your gardening preferences and goals.
Bag Size
Bag size matters for your gardening projects. Larger bags (16 qt.) are great for multiple plants or larger pots. Smaller bags (6 qt.) are better for a few plants or specific needs but may require more frequent purchases.
Plant Type Consideration
Different plants have distinct soil requirements. Succulents and cacti thrive in well-draining mixes. Meanwhile, ferns and tropical plants prefer moisture-retentive soils. Matching the soil type to your plants will enhance their growth.
Shopping around? We have 25 more potting soil guides for other budgets and use cases.
Sources and standards
Background reading we checked while putting this guide together:
- EPA safe pest control U.S. Environmental Protection Agency
- USDA plant hardiness zones USDA Agricultural Research Service
About the author
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