Comparison: Best Potting Soil With Worm Castings (Updated | Nov 11th)
We’ve dug into the best options on the market—balancing quality, value, and real results—so you don’t have to guess. Whether you’re growing lush houseplants or vibrant veggies, the right blend can make all the difference. Let’s find the perfect potting soil that lets your garden thrive, naturally.
Editor’s Choice
Best for a specific purpose
- Best for all‑purpose boost: Harris All Purpose Premium Potting Soil Mix with Worm Castings and Other Nutrients
- Best for pure vermicompost: Back to the Roots Organic Worm Castings for Plants
- Best for vegan soil power: Worm Bliss (1 Qt) – Organic Worm Castings for Plants & Gardening – OMRI-Listed Earthworm Castings for Plants
- Best for family‑farm organic: Brut Organic Worm Castings for Plants 30 LB – Natural Nutrients
- Best for compact organic pack: Brut Organic Worm Castings for Plants 5 LB – Natural Nutrients
- Best for compressed coco‑coir: WONDER SOIL Organic Potting Soil | Ready to Plant Coco Coir Fully Loaded with Nutrients | 3 LBS Bag Expands to 12 Quarts of Indoor Outdoor Soil for Gardens & Plants | Incl Worm Castings
- Best for 7‑in‑1 blend: DUSPRO Recycle Pre-Mixed House Plant Soil Aroid Potting Mix 7-in-1 with Coco Coir
- Best for large‑volume bliss: Worm Bliss (8 Qts) – Organic Worm Castings for Plants & Gardening – OMRI-Listed Earthworm Castings for Plants
- Best for mid‑size organic: Brut Organic Worm Castings for Plants 12 LB – Natural Nutrients
- Best for versatile indoor mix: DUSPRO Recycle Pre-Mixed House Plant Potting Mix 7in1 with Potting Soil Indoor Plants
Product Comparison: Best Potting Soil With Worm Castings
All‑Purpose Boost
Harris All Purpose Premium Potting Soil Mix with Worm Castings and Other Nutrients, 4 Quarts
HARRIS
- All Purpose Potting Mix – Use indoors and outdoors for container gardening, flower boxes, hanging baskets and more
- Contains Worm Castings – A plant superfood, worm castings provide essential nutrients to plants including iron, sulfur, calcium, nitrogen, phosphorus and potassium
- Fast Drainage – Contains pumice and perlite to promote aeration of roots and fast drainage
- Formulated with Coco Coir – A sustainable resource that helps maintain moisture for vibrant flowers, vegetables and herbs
Pure Vermicompost
Back to the Roots Organic Worm Castings for Plants, Natural Fertilizer and Soil Enhancer for Gardening, Made in The USA, 5lb
Back to the Roots
- Earth Worm castings from Mother Earth provide the best soil amendment for anything indoors or outdoors, including vegetables, herbs, flowers and houseplants. Pure USA Vermicompost, so there’s no burn or odor.
- Contains beneficial microbes to enhance your soil and protect seedlings from harmful pathogens.
- Develop your garden more sustainably as worm castings reduce the need for fertilizers.
- 100% SATISFACTION GUARANTEE: If you are not satisfied or have any issues with this Organic Worm Castings, just shoot us a note and our dedicacted customer support team will make sure we get you growing or send you a refund/replacement.
- #GROWONEGIVEONE — share a photo of garden with #GrowOneGiveOne and we’ll donate an Organic Gardening Kit + STEM curriculum to an elementary school classroom of your choice!
Vegan Soil Power
Worm Bliss (1 Qt) – Organic Worm Castings for Plants & Gardening – OMRI-Listed Earthworm Castings for Plants, Vegetables, Flowers, & Potting Soil – Organic Garden Fertilizer Rich in Nutrients
plantonix
- Organic Worm Castings for Garden Soil – Plantonix Worm Bliss is a 100% organic fertilizer and soil amendment that mixes with potting soil for indoor plants and outdoor plants. Worm castings are rich in essential nutrients like nitrogen, phosphorus, and potassium, as well as trace minerals that improve soil conditions for better overall plant mass.
- 100% Vegan & Manure-Free – We raise our worms in a climate controlled facility and feed them a strictly vegan diet. Our earth worm castings for plants are meticulously screened to get rid of any traces of dirt, sand, or rocks, leaving you with nothing but pure worm castings for plants, unlike others who dilute their castings with synthetic ingredients or additives.
- Supports Beneficial Microbial Activity – Using earthworm castings for plants encourages soil microbes that break down organic matter and convert nutrients into forms that plants can easily absorb. These microbes are crucial for increasing nutrient availability and building drought tolerance for a more balanced soil ecosystem.
- Excellent Water Retention – The humus in worm castings improves the soil’s ability to retain moisture, so you can rest assured knowing your plants are staying happy and hydrated. Worm humus for plants reduces the need for frequent watering, so you can save water and promote more sustainable gardening practices.
- Improves Soil Structure & Aeration – Using organic worm castings for plants increases the porosity of the soil, creating a well-oxygenated environment that supports efficient water and nutrient uptake. This makes earth worm castings organic fertilizer an excellent choice for plants, potting soil, potting mixes, garden containers, garden terraces, flowers, garden soil for vegetables, and more.
Family‑Farm Organic
Brut Organic Worm Castings for Plants 30 LB – Natural Nutrients, Fertility Builder, Plant Food for Potting Soil and Garden Soil – Indoor and Outdoor Use
BRUT WORM FARMS
- SUPERCHARGE YOUR GARDEN: Elevate your plants’ growth with premium organic Brut Worm Castings. Our certified organic formula guarantees optimal nutrition for your indoor and outdoor plants.
- PURE ORGANIC GOODNESS: Made with certified organic ingredients, our worm castings are raised indoors in containers, ensuring unparalleled purity and effectiveness for your plants’ health.
- LUSH & VIBRANT PLANTS: Watch your plants thrive with mineral-rich Brut Worm Castings. Experience lush greenery, vibrant blooms, and bountiful harvests—naturally nourishing your plants from root to leaf.
- BORN FROM FAMILY CARE: As a family-owned business, we take pride in offering the finest organic castings. Every batch is carefully crafted to nurture your plants as if they were our own.
- CERTIFIED ORGANIC: Our castings are OMRI and CDFA listed, representing true organic excellence and bringing the power of nature’s nutrients directly to your plants’ roots. Eco sustainable resorce for your gardening enjoyment!
Compact Organic Pack
Brut Organic Worm Castings for Plants 5 LB – Natural Nutrients, Fertility Builder, Plant Food for Potting Soil and Garden Soil – Indoor and Outdoor Use
BRUT WORM FARMS
- SUPERCHARGE YOUR GARDEN: Elevate your plants’ growth with premium organic Brut Worm Castings. Our certified organic formula guarantees optimal nutrition for your indoor and outdoor plants.
- PURE ORGANIC GOODNESS: Made with certified organic ingredients, our worm castings are raised indoors in containers, ensuring unparalleled purity and effectiveness for your plants’ health.
- LUSH & VIBRANT PLANTS: Watch your plants thrive with mineral-rich Brut Worm Castings. Experience lush greenery, vibrant blooms, and bountiful harvests—naturally nourishing your plants from root to leaf.
- BORN FROM FAMILY CARE: As a family-owned business, we take pride in offering the finest organic castings. Every batch is carefully crafted to nurture your plants as if they were our own.
- CERTIFIED ORGANIC: Our castings are OMRI and CDFA listed, representing true organic excellence and bringing the power of nature’s nutrients directly to your plants’ roots. Eco sustainable resorce for your gardening enjoyment!
Compressed Coco‑Coir
WONDER SOIL Organic Potting Soil | Ready to Plant Coco Coir Fully Loaded with Nutrients | 3 LBS Bag Expands to 12 Quarts of Indoor Outdoor Soil for Gardens & Plants | Incl Worm Castings, Perlite
Wonder Soil
- NUTRIENT RICH & INDOOR/OUTDOOR FAST GERMINATION… Wonder Soil Premium Organic Potting Soil Mix is the only dry compressed coco coir mix with added amendments of worm castings, mycorrhizae, kelp, perlite and more! Grow your plants faster with stronger roots! Peat free, all natural, family and pet safe!
- A LITTLE DOES A LOT… your little BIG bag of compressed indoor potting soil & garden soil for outdoor plants expands to 4 TIMES THE SIZE when mixed with water; easy to carry & saves vital shed space.
- PRE-MIXED & READY TO USE ORGANIC POTTING MIX … Pre-mixed and ready to use organic potting soil and garden soil mix to help make your gardening or hobby growing a breeze. Simply transplant your desired plants into their new container and add our soil mix or pour our soil mix and plant your seeds.
- WATER RETENTION & DRAINAGE… Coco coir has excellent water retention with dependable drainage and aeration in the root zone. Save up to 50% of water, fertilizer, and seed!
- HEAVY DUTY RESEALABLE BAG… Use what you need and save the rest for later! Keeping your planting soil dry and safe!
7‑in‑1 Blend
DUSPRO Recycle Pre-Mixed House Plant Soil Aroid Potting Mix 7-in-1 with Coco Coir, Peat Moss, Perlite, Worm Casting, Pumice, Pine Bark & Gypsum, Tropical Potting Mix for Indoor Plants, Herbs 2QRT
Duspro
- 🌱 Premium 7-in-1 Original Blend: DUSPRO house plant soil combines 7 premium ingredients: coco coir, peat moss, perlite, pumice, worm castings, pine bark, and gypsum. Developed based on expert recommendations from Vietnamese plant specialists, this special formula has been tested on diverse plant types. You won’t find this unique blend anywhere else.
- 🌱 Hand-Crafted Pre-Mixed Soil: Carefully blended by hand by skilled rural women in Vietnam, our potting mix ensures consistency and superior quality. Ready to use, saving your time and money compared to preparing it yourself. We provide convenient sizes available in 1 quart, 2 quarts, 4 quarts, 8 quarts and 20 quarts. 01 quart size is enough for 2 pots of 4”. Various sizes are perfect for small projects or larger gardening goals
- 🌱 Optimal Moisture Balance and Aeration: Coco coir and peat moss ensure excellent water retention, while pumice, perlite, and pine bark provide superior drainage and aeration. Our well draining potting soil prevents overwatering, keeps roots healthy, and allows them to breathe and expand freely.
- 🌱 Nutrient-Rich Plant Soil Indoor Potted Plants : Enriched with organic worm castings for essential nutrients and gypsum for minerals and pH balance, this potting mix supports robust root development, enhances soil structure, and promotes long-term plant vitality.
- 🌱 Versatile for Various Plants: DUSPRO chunky soil mix for indoor plants is ideal for aroid plants, flowers, climbing plants, and herbs, including pothos, philodendron, monstera, fiddle leaf fig, snake plant, african violet, peace lily, spider plant, dracaena, anthurium, ZZ plant, basil, mint, parsley, thyme, rosemary, oregano, cilantro, chives, dill, sage, tarragon, geraniums, petunias, marigolds, impatiens, begonias, zinnias, pansies, sunflowers, roses, snapdragons, daisies, and more.
- 🌱 Quality Commitment: DUSPRO house plant potting soil undergoes rigorous quality checks to meet the highest standards. If you’re not completely satisfied, reach out to our professional customer service team for a replacement or refund. Your satisfaction is our priority.
Large‑Volume Bliss
Worm Bliss (8 Qts) – Organic Worm Castings for Plants & Gardening – OMRI-Listed Earthworm Castings for Plants, Vegetables, Flowers, & Potting Soil – Organic Garden Fertilizer Rich in Nutrients
plantonix
- Organic Worm Fertilizer for Plants – Worm castings are a 100% natural soil amendment and garden fertilizer for indoor plants and outdoor plants. Organic earthworm castings are rich in essential nutrients like nitrogen, phosphorus, and potassium, as well as trace minerals that improve soil conditions for better overall plant mass.
- 100% Vegan & Manure-Free – We raise our worms in a climate controlled facility and feed them a strictly vegan diet. The castings are meticulously screened to get rid of any traces of dirt, sand, or rocks, leaving you with nothing but pure worm castings for plants, unlike others who dilute their castings with synthetic ingredients or additives.
- Supports Microbial Activity – Using earthworm castings for plants encourages soil microbes that break down organic matter and convert nutrients into forms that plants can easily absorb. These microbes are crucial for increasing nutrient availability and building drought tolerance for a more balanced soil ecosystem.
- Excellent Water Retention – The humus in worm castings improves the soil’s ability to retain moisture, so you can rest assured knowing your plants are staying happy and hydrated. This reduces the need for frequent watering, so you can save water and promote more sustainable gardening practices.
- Improves Soil Structure & Aeration – Using organic worm castings for plants increases the porosity of the soil, creating a well-oxygenated environment that supports efficient water and nutrient uptake. This makes Worm Bliss an excellent plant fertilizer for potting soil, potting mixes, garden containers, garden terraces, vegetables, flowers, and more.
Mid‑Size Organic
Brut Organic Worm Castings for Plants 12 LB – Natural Nutrients, Fertility Builder, Plant Food for Potting Soil and Garden Soil – Indoor and Outdoor Use
BRUT WORM FARMS
- SUPERCHARGE YOUR GARDEN: Elevate your plants’ growth with premium organic Brut Worm Castings. Our certified organic formula guarantees optimal nutrition for your indoor and outdoor plants.
- PURE ORGANIC GOODNESS: Made with certified organic ingredients, our worm castings are raised indoors in containers, ensuring unparalleled purity and effectiveness for your plants’ health.
- LUSH & VIBRANT PLANTS: Watch your plants thrive with mineral-rich Brut Worm Castings. Experience lush greenery, vibrant blooms, and bountiful harvests—naturally nourishing your plants from root to leaf.
- BORN FROM FAMILY CARE: As a family-owned business, we take pride in offering the finest organic castings. Every batch is carefully crafted to nurture your plants as if they were our own.
- CERTIFIED ORGANIC: Our castings are OMRI and CDFA listed, representing true organic excellence and bringing the power of nature’s nutrients directly to your plants’ roots. Eco sustainable resorce for your gardening enjoyment!
Versatile Indoor Mix
DUSPRO Recycle Pre-Mixed House Plant Potting Mix 7in1 with Potting Soil Indoor Plants, Tropical Indoor Potting Soil with Pine Bark, Pumice, Coco Coir, Perlite, Worm Castings, Gypsum, Peat Moss 1QRT
Duspro
- 🌳Pre-Mixed & Ready to Use: DUSPRO Recycle indoor potting soil for house plants is meticulously crafted for convenience. Offering a balanced 7-in-1 blend of pine bark, pumice, coco coir, perlite, worm castings, gypsum, peat moss, ensuring optimal houseplant care and growth. Saving more time and money than preparing by yourself. Available in 4 sizes: 1 qrt, 2 qrt, 4 qrt, 8 qrt, 20qrt dry volume.
- 🌳 Nutrient-Rich Composition: Enriched with essential nutrients, our potting soil for indoor plants supports lush growth in various indoor plant soil potting mix scenarios. The combination of coco coir, peat moss, worm castings and gypsum provides essential nutrients and minerals needed for healthy plant soil.
- 🌳 Superior Drainage : Our indoor potting mix features a chunky soil mix for indoor plants, enhancing aeration and moisture retention with pine bark perlite and pumice. Tailored for tropical potting mix needs, this blend supports robust growth in house plant soil and ensures healthy root systems. Designed to promote well draining, our plant soil indoor potted plants mix ensures your plants thrive without overwatering. DUSPRO house plant soil indoor is perfect for tropical and aroid plants.
- 🌳 Versatile Use: Suitable for a wide range of plant types, DUSPRO Recycle potting mix soil is perfect for repotting soil for indoor plants such as planting soil indoor plant for aroid plants, climbing plants, flowers, and herbs, including pothos, philodendron, monstera, fiddle leaf fig, snake plant, african violet, peace lily, spider plant, dracaena, anthurium, ZZ plant, basil, mint, parsley, thyme, rosemary, oregano, cilantro, chives, dill, sage, tarragon, sunflowers, roses, daisies…
- 🌳 Quality Commitment: We ensure that DUSPRO Recycle indoor soil potting mix undergoes strict quality control procedures and meets our high-quality requirements. However, if for any reason you are not fully satisfied, please feel free to contact us; our professional customer service staff will be delighted to provide you with a replacement or refund.
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 look for when choosing a potting mix that contains worm castings?
Focus on a blend that balances nutrients, drainage, and moisture retention. Look for added components such as perlite, pumice, or coco coir that improve aeration while the worm castings supply nitrogen, phosphorus, and potassium. Certifications like OMRI or CDFA indicate organic compliance, and a sustainable source (e.g., vegan‑raised worms) adds extra value.
How does Harris All Purpose Premium Potting Soil compare to Wonder Soil’s pre‑mixed blend?
Harris mixes coco coir with pumice and perlite for fast drainage and a light texture, while Wonder Soil is a compressed coco coir block enriched with mycorrhizae, kelp, and worm castings that expands four‑fold when hydrated. Wonder Soil emphasizes a highly nutrient‑dense formula and space‑saving packaging, whereas Harris offers a ready‑to‑use mix that’s already aerated. Both are organic, but Wonder Soil includes additional microbial inoculants for root health.
Are the larger bulk worm‑casting bags, like Brut’s 30 lb bag, a better value than the 5 lb packs?
Generally, the cost per pound drops significantly with bulk sizes, making the 30 lb bag more economical for frequent gardeners. However, larger bags require proper storage to keep the castings dry and may be overkill for small indoor setups. Consider your planting volume and space before deciding.
What are the benefits of vegan, manure‑free worm castings such as Worm Bliss compared to traditional castings?
Vegan, manure‑free castings are screened to remove sand, rock, and animal waste, resulting in a purer nutrient source that reduces the risk of odor or pathogen transfer. They still provide the same rich humus and microbial activity that improve soil structure and water retention. This purity is especially valuable for indoor plants and organic certifications.
Can a worm‑casting‑rich mix be used for both indoor houseplants and outdoor vegetable beds?
Yes, worm castings boost nutrient availability in any setting, but the overall mix must also address drainage needs. For indoor plants, a lighter blend with perlite or pumice prevents waterlogging, while outdoor beds benefit from added coarse materials to improve aeration. Adjust the proportion of castings to other components based on the specific plant’s water and nutrient demands.
How important is OMRI certification when selecting organic worm castings?
OMRI certification guarantees that the product meets strict organic standards, ensuring no synthetic fertilizers or prohibited substances are present. This is crucial for growers who need to maintain organic certification for their produce or who prefer environmentally friendly inputs. Certified products also tend to undergo more rigorous testing for purity and microbial safety.
Which product offers the best balance of water retention and drainage for tropical aroid plants?
DUSPRO Recycle’s 7‑in‑1 pre‑mixed potting soil combines coco coir, peat moss, and worm castings for moisture retention, while pine bark, perlite, and pumice provide excellent drainage and aeration. This blend mimics the loose, well‑draining substrate aroids thrive in, making it a top choice for tropical foliage. The added gypsum helps maintain a stable pH for sensitive aroid roots.
What should I consider regarding sustainability and packaging when buying potting soil?
Compressed coco coir blocks, like Wonder Soil, reduce shipping volume and waste, expanding only when water is added. Reusable resealable bags, as seen with some DUSPRO mixes, help keep the soil dry for longer storage. Look for products that use recycled or biodegradable packaging and source worm castings from environmentally responsible farms.