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25 lb. Simple Grow Worm Castings

Certified by Organic Certifiers as part of the USDA Organic Input Materials Program

Simple Grow Worm Castings is the most potent soil enhancer on the market and provides your plants exactly what they need, exactly when they need it. Packed with loads of rich nutrients, these worm castings will give your plants an immediate boost, as well as provide nutrition for the long-term.

Bags: 1 Bag

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Customer Reviews

Based on 124 reviews
Looks lovely

This is the 1st time I purchased the worm castings. The castings look very rich and were easy to add to my potting soil. Can't wait to see how well my plants grow.

Jackie Rosenthal

I love this stuff! I use it for new plants, and top dress in my potted plants. Everything gets some! I used a lot in a raised bed a couple of years ago, it made the soil much lighter and weeds are so easy to pull. Shipping was fast, customer service is great.

James Eckley
Great Service at a Very Reasonable Price

Ordered on line and the product arrived in a timely manner. The wife started using on her plants and is pleased with the product so far. Be sure to use on a windless day as the material is real fine and easily blows away. Overall am pleased so far.

Susan Blue
Received BUT not used yet

The raised beds are not installed yet, hence, we can not use it yet.
Is there any expiration date for these? The bags are stored in the garage, away from any sunlight.

Worm Castings

The worm castings were really easy to spread and dig into my raised beds; no clumping and no excess moisture. We'll see how the garden performs but it's too early to tell. I give them five stars because of the quality but also because of the reasonable cost, the prompt fulfillment of my order and the shipping. The website was easy to use and the Customer Service was pleasant and efficient. I'll definitely use them again.Thank you.

100% pure worm castings icon
nutrient rich worm castings
approved for organic use fertilizer
safe fertilizer for all plants
fast shipping worm castings

Safe & Organic Soil Builder

Benefits of Using Simple Grow Worm Castings

Provide plants with the nutrients they need to grow strong and healthy with 100% earthworm castings.

According to the USDA Natural Resources Conservation Service, worms digest the plant material they ingest and concentrate the nutrients in their castings. Their castings are extremely rich in phosphorus, nitrogen, potassium, and magnesium.

They also contain live organisms, like actinomycetes, fungi, pseudomonads, beneficial bacteria, yeasts, plant growth regulators, molds, and trace elements. All these elements work together to create a favorable environment for plants and stimulate their growth.

Our worm casting Soil Builder is safe to use in any quantity. Your children or pets can safely play in the garden, and you can safely store it your garage, basement, or garden shed, without worrying about unpleasant smells or pest invasions.

You will find numerous ads for soil enhancers based on worm castings for sale. Many of them refer to soil with impurities, chemicals, or other ingredients not suitable for growing your precious plants. We sell 100% organic, pure earthworm castings, perfect for organic farming and gardening, and for use in decorative areas, like gardens, lawns, and greenhouses as well.

Our prices are already unbeatable, but due to the purity of our Simple Grow Soil Builder, a small quantity is enough to enhance the soil and let you obtain amazing results. To convince yourself, you can begin by ordering our worm castings 12 lb bag. Spread it on the soil in your garden and compare the plants growing in that corner with the rest of your garden. The results will speak for themselves.

How much Simple Grow should I use?

Mix 1/2 cup into the soil above the root zone. Be sure not to damage shallow roots. Apply to the soil in the spring, early in the summer and early in the fall.

One 5 lb. bag = 10 cups (80 oz.)

15 lbs per 5-10 potted plants.

New potting mix:use 1 part Simple Grow Soil Builder to 3 parts of soil.

Established plants: Add 1-2" of Simple Grow Soil Builder to the top of the soil. Mix in and be careful not to damage shallow roots. Water and repeat process every 2-3 months.

New or freshly transplanted:Mix 1 part Simple Grow Soil Builder with 3 parts soil. Surround newly dug hole with mixture. Spread roots over a mound of the mix in the hole and cover. 2 lbs. per tree every month.

Established:Mix 4 cups of Simple Grow Soil Builder into soil 2-3" below the surface for each plant. 1 lb. per inch in tree diameter every two months.

Newly seeded: apply 10 lbs. per 100 sq. ft. Work lightly into the top soil. Mix in grass seed and water well.

Established lawns: Distribute as top dress 10 lbs. per 100 sq. ft.

10'x10' Garden (100 sq. ft.):
Planting seeds - 30 lbs.
After sprouting - 15 lbs.
Top dress - 1/2 lb. per plant every 2 months.

Soak 1 part Simple Grow Soil Builder in 3 parts water for 12-24 hours. Stir well and water as usual. Casting tea is excellent for fruiting, flowering or difficult to access potted plants.

Spread a thin layer of Simple Grow Soil Builder between each new layer of material to be composted.