Packed with vital nutrients and microbes, worm castings enrich your soil, boost plant growth, and help your garden thrive—without chemicals. Whether you’re growing fruits, veggies, flowers, or houseplants, our worm castings are the simple, sustainable way to grow healthier, more vibrant plants.
My plants have never looked so good…my flowers have larger blooms and my garden produces bigger veggies! I love this stuff!
Nicole Brue
Centennial, CO
Mixing worm castings directly into their garden beds to significantly enrich the soil, enhance nutrient absorption, and stimulate beneficial microbial activity. This encourages robust root systems, healthier plants, and abundant growth throughout the garden.
Blend worm castings into existing potting soil and dramatically improve nutrient content and soil structure for indoor plants. This natural boost to soil quality promotes lush foliage, vibrant flowers, and healthier growth in potted plants and indoor container systems.
Our clients use worm castings as a gentle yet powerful organic fertilizer by applying it directly around plants or as a top dressing. The castings supply steady, long-lasting nutrition, reducing reliance on synthetic fertilizers and creating vibrant plant growth.
After trying the worm castings, we noticed a big difference in our plants within a week or two. They look healthier, greener and we don’t have to add any additional fertilizers.
Trevor Corr
Highlands Ranch, CO
Family owned small-business
When you buy from Colorado Worm Farm, you’re supporting a local, family-owned business dedicated to sustainable gardening and exceptional quality. Your purchase strengthens our community and delivers gardening results you can trust.
100% All natural product
At Colorado Worm Farm, we’re proud to offer premium worm castings that are 100% natural, chemical-free, and sustainably produced. Our pure, nutrient-rich castings loaded with microbes naturally improve your soil, strengthens plant health.
Money-back guarantee
We’re confident you’ll love the results our worm castings bring to your plants and garden. If you’re not completely satisfied, we offer a no-hassle money-back guarantee. Just let us know, and we’ll refund your purchase promptly—no questions asked. Shop our online store risk free!
Worm castings do their magic all naturally! Packed with balanced nutrients and beneficial microbes, they improve soil structure, boost fertility, and support plant health without the need for synthetic additives or complicated formulas. Reduce the need to constantly test your soil and rely on Mother Nature instead of expensive chemicals. It’s an easy, no-fuss way to grow your garden and plants with confidence.
Super friendly staff and very knowledgeable about the product. I have been very happy with my purchases.
Elaine Tracey
Littleton, CO
Get all the "dirt" about worm castings
Worm castings are the nutrient-rich waste left behind after worms digest organic matter. Think of them as nature’s finest fertilizer—packed with plant-ready nutrients and beneficial microbes that supercharge your soil the way nature intended.
They’re incredibly easy to use! Just mix them into your garden beds, potting mix, or sprinkle a handful around the base of plants. No need to measure precisely—they’re gentle and won’t burn your plants, so you can apply with confidence.
Yes, 100%! Our worm castings are all-natural, chemical-free, and completely safe for curious kids and furry garden helpers. You don’t have to worry about harsh fertilizers or synthetic residues—just pure, living soil.
Regular compost is great, but worm castings take it to the next level. They contain more concentrated nutrients and beneficial microbes that help your plants absorb what they need, when they need it. It’s like giving your soil a supercharged multivitamin.
Definitely! Indoor plants love worm castings. Just sprinkle a tablespoon or two on top of the soil every few weeks. It feeds them gently and steadily—no risk of overdoing it, just happy, healthy plants with vibrant leaves.
Every 4–6 weeks is a good general rule, but feel free to use them more often if you like. Since they’re mild and organic, you won’t run into issues with over-fertilizing. They work steadily over time, feeding your soil as needed.
Not at all! They have a clean, earthy smell—just like healthy soil should. No foul odors, no mess, and no complaints from anyone who shares your home or garden.
They can definitely help! Worm castings support healthier soil and plant immunity, which means your plants are better equipped to fight off common pests and diseases. Healthier soil = stronger, more resilient plants.
Yes, and your plants will love you for it. Just steep a few scoops of worm castings in water for 24–48 hours, stir occasionally, and then pour or spray the liquid around your plants. It’s a fantastic way to give them a fast-acting nutrient and microbe boost.
Worm castings are alive with beneficial microbes, so it’s best to store them in a cool, dry place out of direct sunlight. Keep the bag loosely closed or ventilated—airflow helps maintain microbial activity. Avoid letting them dry out completely or sit in standing water, and they’ll stay fresh and effective for months.
