G&B Organics

G&B Organics Worm Gro Earthworm Castings

20 Quarts (22L) bag


Soil Application Video

G&B Organics

G&B Organics Earthworm Castings

20 Quarts (22L) bag


Ideal for improving garden soil for plants, flowers, vegetables, trees and lawns.

  • Organic worm castings from premium ingredients
  • Also known as vermicompost or vermicastings
  • Can also be used to make “worm tea” for the garden

Application rate
20 QT – Covers a 9 sq ft area with a 1 inch layer

pH Range 6.0 – 7.3

Download SDS Sheet

Find in Stores

Only available in AZ, CA, HI, ID, OR, NV, UT, WA.

How much soil do I need?

Soil Calculator


Earthworm castings, recycled forest products, kelp meal

Best Uses in the Garden

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Annuals & Perennials

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Vegetable Gardens

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Enriching Soil

Designed to enrich your native soil.

Worm castings, also known as vermicompost or vermicastings, are created when organic matter passes through the digestive system of earthworms. The earthworm’s special digestive process transforms organic material into a fantastic soil supplement that plants simply love. Combine G&B ORGANICS WORM-GRO with your native soil or use it as an effective “worm tea” to fertilize a variety of plants, flowers, vegetables and even lawns. By mixing WORM-GO into your soil at the drip line, you’ll be helping your plants resist disease and pests while increasing beneficial microbe activity that creates a great soil environment in-ground or in-containers.


G&B Organics Earthworm Castings is listed by the Organic Materials Review Institute (OMRI), the leading non-profit, internationally recognized material review organization accredited by the USDA Quality Assessment Division. Every ingredient and every process that goes into making G&B Organics Earthworm Castings have been verified 100% compliant for organic use, all the way to the original source.

Download OMRI Certificate

Regitered Organic Input Material certified CDFA
OMRI Listed for Organic Use Seal

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