100% Safe and Natural Way of Organically Fertilizing

Plants, Gardens, Nurseries, Orchards Etc.

Our Products

Circle M Worm Castings are great for several commercial and residential needs. From Vineyards to Cannabis Operations to Home Gardens, our premium worm castings provide rich nutrients to your plants in a form they can use.

About Us

Based in Ontario, OR, our family run Circle M Farms provides our high-quality worm castings to Oregon, Washington, Idaho, and Nevada.

What are Worm Castings

Worm castings are different from other animal manure and artificial fertilizers. Circle M Worm Castings feel and smell like the purest of soils. By using our premium worm castings instead of potentially toxic chemical fertilizers, you protect the environment and fertilize the way Mother Nature intended.

Follow Us on Social Media

Keep up with us on Facebook @circlemfarmswormcastings.

Find Our Products

Our African Nightcrawlers are raised in a state of the art temperature and humidity controlled environment. They are fed our proprietary grain based feed formula and given the absolute best soil to live in. We do not use any fillers in our product and we believe you won’t find a better premium worm casting. We are now offering bulk one time orders or discounted contract purchases. Looking for a retailer or want to buy for your commercial farm? Check out our retailer locater.

Our products


What is the best soil to use for cannabis?

The Right Soil for Cannabis

When growing cannabis, the soil is the foundation.  It is super important to make sure it is full of the right nutrients and has the environment to help your plants thrive. If you are growing in Orego...

Read more

Replenish Your Soil for Spring

Snow is starting to fall, and you have probably harvested your plants already. So there is nothing to do now until Spring comes and it's time to replant right? Wrong!  Now is the perfect time to reple...

Read more

What is Worm Tea?

Worm tea at a fundamental level is worm compost that has been concentrated. Worm castings are known for their ability to replenish the soil with essential nutrients, provide a defense against disease ...

Read more