Earthworm Castings, 12 Lb.
Best organic soil amendment for gardeners seeking healthier, more vibrant plants.
Elevate your gardening with Earth Science Earthworm Castings, a 12 lb bag of the richest, most natural compost available. This odorless, non-burning solution significantly boosts microbial activity for a living, nutrient-rich soil. Ideal for seed starting, container gardens, trees, shrubs, and all indoor/outdoor plants, it slowly infuses soil with superior nutrients. Certified all organic and OMRI Listed, it's a trusted choice for healthier plants and vibrant gardens.
$27.99
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Owner Satisfaction
4.6
/ 5
Category Rank
80
/ 187
#80 in Compost
Price vs Category Average
+15%
Above average
Weight
12
/ lbs
Who it's for
- Gardeners seeking steady, burn-free plant nutrition
- Indoor growers needing improved soil drainage and microbial health
- Pet owners and parents prioritizing non-toxic garden inputs
Who should skip it
- Budget-conscious gardeners managing large-scale planting areas
- Users looking for high-concentration, fast-acting synthetic fertilizers
- Indoor gardeners sensitive to natural soil odors and textures
Performance breakdown
Soil Vitality Impact
Rapidly stimulates microbial life for a more resilient root environment.
Application Versatility
Seamlessly integrates into indoor pots, vegetable beds, and ornamental landscapes.
Nutrient Delivery
Slow-release formula ensures consistent nourishment without risking chemical burn.
Organic Integrity
OMRI certification provides total confidence for strictly organic gardening practices.
User Experience
Odorless composition makes indoor application clean and entirely hassle-free.
Granular Consistency
Uniform texture allows for precise, mess-free distribution across all soil types.
Key Specs
Weight
12 lbs
Brand
Earth Science
Product type
Soil Conditioner
Form
Granular
Odor Level
Low Odor
Organic Certification
OMRI Listed
Intended Use
Lawn, Vegetable Garden, Indoor Plants, Trees and Shrubs
Application Method
Sprinkle a small amount
Features
- Richest, most natural compost
- Odorless and non-burning
- Boosts microbial activity
- Slowly enriches soil
- Suitable for all plants
- All organic composition
- OMRI Listed certification
What customers say
Customers overwhelmingly praise Earth Science Earthworm Castings for its exceptional efficacy as a natural soil amendment. Reviewers consistently report dramatic improvements in plant health, noting accelerated growth and richer foliage quickly. The product is valued for its purity, being virtually odorless and simple to mix into any soil. Organic gardeners appreciate this safe, chemical free booster for both gardens and houseplants, confirming its versatility. While the initial cost exceeds synthetic options, the superior, sustainable results strongly justify the premium. The overall sentiment reflects high trust in the brand for delivering robust, reliable plant nutrition that provides excellent perceived value.
Know before you buy
No, this product is non-burning. Because it is a natural, organic soil conditioner, it is safe to use on sensitive seedlings and indoor plants without the risk of chemical fertilizer burn.
Not at all. These earthworm castings are virtually odorless, making them an excellent choice for indoor container gardens or greenhouses where you don't want a lingering compost scent.
Simply sprinkle a small amount of the granular castings onto the soil surface around the base of your plants. You can gently work it into the top layer of soil or let it naturally filter down through watering.
Yes, it is perfectly safe for edible crops. It is OMRI Listed, meaning it meets the strict standards required for organic gardening and production.
While potting mixes provide structure, these castings actively boost microbial activity in the soil. This creates a living ecosystem that helps your plants absorb nutrients more efficiently over time.
Because this is a slow-release amendment, you do not need to apply it as frequently as synthetic fertilizers. A light application at the start of the growing season or when potting new plants is usually sufficient to provide a steady stream of nutrients.
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Ready to buy?
$28