Comparison: Best Potting Mix With Worm Castings (Updated | Nov 11th)
We’ve dug deep (pun intended) to find the best potting mixes packed with nutrient-rich worm castings that your plants will absolutely love. From houseplants to garden beds, these blends promise healthier roots, greener growth, and fewer headaches. Let’s break down the top contenders and help you pick the perfect mix for your greenest season yet.
Editor’s Choice
Harris All Purpose Premium Potting Soil Mix with Worm Castings and Other Nutrients
All-Purpose Worm Mix
Best for a specific purpose
- Best for all-purpose worm mix: Harris All Purpose Premium Potting Soil Mix with Worm Castings and Other Nutrients
- Best for bulk organic boost: Brut Organic Worm Castings for Plants 30 LB – Natural Nutrients
- Best for vegan microbial power: Worm Bliss (1 Qt) – Organic Worm Castings for Plants & Gardening – OMRI-Listed Earthworm Castings for Plants
- Best for small-scale organic: Brut Organic Worm Castings for Plants 5 LB – Natural Nutrients
- Best for compressed coco blend: 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 mid-size nutrient pack: Brut Organic Worm Castings for Plants 12 LB – Natural Nutrients
- Best for 7-in-1 aroid mix: DUSPRO Recycle Pre-Mixed House Plant Soil Aroid Potting Mix 7-in-1 with Coco Coir
- Best for family-size vegan castings: Worm Bliss (8 Qts) – Organic Worm Castings for Plants & Gardening – OMRI-Listed Earthworm Castings for Plants
- Best for versatile indoor blend: DUSPRO Recycle Pre-Mixed House Plant Potting Mix 7in1 with Potting Soil Indoor Plants
- Best for biochar moisture master: Wakefield Biochar Potting Mix & Indoor Plant Soil – Potting Soil Indoor Plants w/CarbonBoost Technology – Organic Compost
Product Comparison: Best Potting Mix With Worm Castings
All-Purpose Worm Mix
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
Bulk Organic Boost
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!
Vegan Microbial 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.
Small-Scale Organic
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 Blend
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!
Mid-Size Nutrient Pack
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!
7-in-1 Aroid Mix
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.
Family-Size Vegan Castings
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.
Versatile Indoor Blend
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.
Biochar Moisture Master
Wakefield Biochar Potting Mix & Indoor Plant Soil – Potting Soil Indoor Plants w/CarbonBoost Technology – Organic Compost, Pine Bark, Worm Castings – Garden Dirt – 4 Quart
Wakefield Biochar
- CarbonBoost Technology: Harness the power of activated biochar to capture and retain essential macro- and micronutrients, balance pH, and deliver nutrients slowly over weeks. This dynamic planting soil enhances water absorption, cutting down on frequent watering and fertilizer runs, while sustainably sourced biochar improves soil structure. Well-designed to stand out in the market. Perfect for thriving houseplants, succulents, and herbs.
- Smart Moisture Management: Our unique system combines high-surface-area biochar with natural fiber substrates to wick away excess water and hold it within microscopic pores. This advanced formula is used for indoor potting soil, while delivering the benefits of premium organic potting soil and organic soil for vegetable garden. Ideal as tierra para plantas for herbs and veggies alike. It prevents waterlogging and root rot by releasing moisture back to the roots whenever needed.
- Professional Indoor Growing Solution: Formulated for growers of all levels, from beginner herb gardeners to advanced plant enthusiasts, this chunky soil mix for plants excels in any container, from small ceramic pots to large decorative planters. Our blend outperforms typical garden soil for vegetables, gardening soil, house plant soil, and ordinary plant dirt. It’s the ultimate potting soil for vegetables, herbs, and ornamental plants.
- Indoor Plant Soil for All Varieties: Wakefield’s versatile houseplant soil delivers the perfect balance for every indoor plants. Use it as an advanced potting mix, optimal snake plant soil, or tropical potting mix. Enhanced for potting soil succulents, this indoor plant soil supports thriving growth in pothos, peace lilies, philodendrons, herbs, and a wide range of edible and ornamental indoor plants.
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 key ingredients should I look for in a potting mix that contains worm castings?
A high‑quality mix will combine worm castings with a well‑balanced blend of aeration agents such as perlite, pumice, or pine bark, and moisture‑retaining components like coco coir or peat. This combination ensures nutrients are available while preventing waterlogging and promoting healthy root growth. Look for products that list these components explicitly in the feature list.
How does a pre‑mixed potting soil compare to buying worm castings alone?
Pre‑mixed soils, like Harris All Purpose Premium Potting Soil or Wonder Soil, integrate worm castings with drainage and moisture‑holding amendments, offering a ready‑to‑use solution that saves time and reduces the risk of incorrect ratios. Pure worm castings, such as Brut Organic or Worm Bliss, provide a nutrient boost you can add to any existing mix, giving you flexibility to customize. Choose a pre‑mix if you want convenience, or pure castings if you already have a base soil you trust.
Which product offers the best balance of drainage and water retention for container gardening?
The Harris All Purpose Premium Potting Soil mixes pumice and perlite for fast drainage while using coco coir to hold moisture, creating an optimal balance for both indoor and outdoor containers. Wakefield Biochar Potting Mix also excels by using biochar for moisture management and aeration, but it leans more toward water‑saving properties. For most gardeners, Harris provides a reliable all‑round performance.
Is there a size or quantity that gives the best value for larger garden projects?
Buying in bulk generally lowers the per‑pound cost; Brut Organic offers 30 lb and 12 lb bags of pure worm castings, which are economical for extensive beds or multiple containers. DUSPRO’s 20‑quart pre‑mixed houseplant soil provides a large volume of a 7‑in‑1 blend at a competitive price. If you need both nutrients and a base mix, the larger Harris or DUSPRO bags give the most bang for your buck.
Are there vegan or manure‑free worm casting options?
Yes, Worm Bliss (both 1 qt and 8 qt sizes) advertises a 100 % vegan, manure‑free formula, with worms raised on a strictly plant‑based diet and screened to remove any soil contaminants. This contrasts with some traditional castings that may include trace soil or manure residues. Vegan gardeners seeking a clean amendment should consider Worm Bliss.
How important are organic certifications like OMRI or CDFA when choosing a worm‑casting product?
Certifications such as OMRI‑listed or CDFA‑listed confirm that the product meets strict organic standards, ensuring no synthetic chemicals or prohibited additives are present. Both Brut Organic and Worm Bliss carry these certifications, which can be crucial for growers following organic gardening protocols. Certified products also tend to have consistent nutrient profiles.
What are the benefits of mixes that use coco coir instead of peat moss?
Coco coir is a renewable, peat‑free material that offers excellent water retention while allowing good aeration, and it has a neutral pH that suits most plants. Products like Harris All Purpose and Wonder Soil leverage coco coir to create a sustainable, high‑performance mix. Peat, while effective at moisture retention, is less environmentally friendly and can be more acidic.
Which product is most suitable for indoor houseplants versus outdoor container gardens?
For indoor houseplants, lightweight, peat‑free mixes such as Wonder Soil or DUSPRO’s indoor‑specific 7‑in‑1 blend provide optimal aeration and moisture control without heavy weight. Outdoor containers benefit from the added drainage of pumice and perlite found in Harris All Purpose Premium Potting Soil, which handles variable weather conditions well. Choose based on where you’ll be planting and the specific moisture needs of your plants.