Soil Amendment Worm Castings Label
Pure Earthworm Castings
Pure Earthworm Castings Soil Amendment
Earthworms in Soil
Bulk Bag of Worm Castings

Pure Earthworm Castings

Regular price$14.00
/
Shipping calculated at checkout.

  • In stock, ready to ship
  • Inventory on the way

Rocky Mountain BioAg® Pure Earthworm Castings: The Organic Boost for Healthy, Productive Soil

Enhance your garden’s vitality with Rocky Mountain BioAg® Pure Earthworm Castings—an all-natural, nutrient-rich soil amendment that stimulates soil health and plant growth. Created from night crawler castings packed with organic materials, minerals, and trace elements, this “super humus” is a powerhouse soil conditioner that improves plant resilience across all soil types and growing conditions.

Why Choose Pure Earthworm Castings?

Rich in essential nutrients like nitrogen, phosphorus, and potassium, Rocky Mountain BioAg® Pure Earthworm Castings provide the organic solution needed for everything from fruit trees to vegetable gardens and flower beds. These castings are safe for plants, animals, and the environment, making them the ideal choice for eco-conscious gardeners committed to sustainable practices.

Key Benefits:

  • All-Natural & Made in the USA: High-quality, organic castings sustainably sourced for eco-friendly gardening.
  • Improves Soil Structure & Water Retention: Conditions soil to retain moisture, supporting healthy root development.
  • Versatile Applications: Perfect for soil mixes, top dressing, compost teas, and a variety of plants.
  • Nutrient-Rich: Packed with essential nutrients to boost plant health and yield.

Application Instructions:

  • Base Potting Soil: Mix 15–25% by volume per cubic foot of base potting soil.
  • Top-Dressing: Apply 1 tablespoon per inch of pot size as needed.
  • Compost Piles: Add a thin layer of castings between compost layers.
  • Vegetables & Annual Flowers: Line planting holes with 1–2 inches of castings and side-dress throughout the season.
  • Perennials, Roses, Trees & Shrubs: Apply seasonally above root zones; for new plantings, mix castings with soil around roots.
  • Turf Grass: Apply 100 lbs. per 1,000 sq. ft. for established turf or grow-ins, raking in for best results.
  • Compost Tea: Brew 2 cups of castings per 5 gallons of water for 24–34 hours.

Experience the full benefits of sustainable, organic soil conditioning with Rocky Mountain BioAg® Pure Earthworm Castings—a natural, effective solution for vibrant, thriving plants.

TIRED OF BREWING COMPOST TEA?: 

Use Microbe Life Hydro / Quantum Growth microbial inoculants for superior results and apply when the time is right for you! Quantum Organic Light, Quantum Growth Organic VSC and Quantum Organic Total will save you time and money completely the need to brew compost teas. The Quantum Growth Series provides pure biological strains allowing you to perform controlled biological inoculation with replicated results time and time again! No waiting on brewing, just mix the probiotics with clean water your favorite plant amendments / foods and soil drench or foliar apply immediately!

*Contact RMBA for pricing on bulk worm castings*

This site is protected by hCaptcha and the hCaptcha Privacy Policy and Terms of Service apply.

Biological... Beyond Organic®

Organic is just the start

RMBA is committed to provide natural and organic products that support healthy soils. Even if a product is not listed as 'organic' you can rest assured that it will help, not hurt your soil.

Don't take our word for it

★★★★★

This has been the best pumice i have ever used!!! Besides the great customer service (*****)

Ricardo S

McAllen, TX

★★★★★

Rocky Mountain BioAg has the best customer service! Prompt delivery and product support. Thanks !

Joe B

South Kingstown, RI

★★★★★

I have a greenhouse that unfortunately does not get the ideal sunlight due to its location on the north side of my home. I have been using Rocky Mountain BioAg’s Quantum Growth Organic Total for over a year and have seen a dramatic increase in plant growth and vegetable yield compared to past years. Highly recommend the product.

Jack C

Sarasota, FL

★★★★★

Excellent customer service, quick response, fast turnover and shipment of merchandise and product was exactly what was described on website and what I wanted. Great Company!

Jessica S

Harrisonburg, VA