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Growing potted plants can be extremely rewarding and many people love to keep them around the house. In some cases, taking care of them and keeping them from dying can be a challenge.

Are you one of those people that feels like they can’t keep anything alive? If so, using worm castings for your potted plants might be the solution you’ve been searching for. Why are worm castings so great for potted plants?

PS. We also have a very thorough Guide on  Earthworm Soil Fertilizer Mix you can check out at your convenience. 

Disease Prevention

One of the big challenges that people have when growing potted plants is that the plants contract diseases. Growing indoors can be especially difficult because plants are more prone to picking up diseases.

When they’re not in direct sunlight as often as they would be outside, it can be easier for diseases to manifest. With the humidity being different than it is outside, this also can create an environment that is ripe for disease. 

Luckily, when you use worm castings in your potted plants, the odds of your plants contracting a disease go down considerably. The microbes in the worm castings form a type of protective barrier around the plant and in the soil.

This means that if a disease makes its way into the area, it won’t be able to take root and destroy the plant. If you’ve been struggling to grow plants indoors, this can be a huge thing for making you more successful. 

Growth Boosting

Remember those microbes I mentioned earlier? Those things are great for boosting plant growth also as it turns out. The worm’s gut has thousands of good bacteria in it that comes out on the casting. These microbes are perfect for rapidly boosting the growth of all kinds of plants.

These microbes can drastically improve the condition of the soil that the potted plants are in. In nature, when earthworms are present, they naturally condition the soil like this. They eat dirt and waste and then turn it into castings. When castings are present in large quantities in the soil, plants will grow like crazy. 

Moisture Regulation

Regulating the moisture around their plants is another common challenge that people have when growing potted plants. The humidity level is often different indoors when compared to how plants live outside. When the moisture level is too high, it can encourage plant disease and root rot.

Another nice thing about worm castings is that they work to regulate the moisture level around the roots of the plant. When they’re mixed into the soil, they will absorb water that makes its way into the dirt. Then at the perfect time, they’ll release the moisture.

If the plant doesn’t need it, it’ll stay in the castings longer. This helps ensure that your indoor plants get the right amount of water at all times. If you water too much, the castings probably won’t be able to overcome that, so you’ll still need to be careful. But they can help accommodate for some errors along the way.

Just don’t drown the plants and you should be good.


Another nice thing about mixing in worm castings into your potted plants is that they help aerate the soil. In some potted plants, the soil gets packed down and hard. This makes it really difficult for oxygen to get to the roots of the plant.

When you have castings in the soil, it won’t be able to fully pack down. Worm castings particles are like little tiny balls that won’t smash down. By increasing the oxygen to the roots of the plant, your plants will be much more likely to thrive in this environment. 

Trace Minerals and Nutrients

Besides the microbes, worm castings are also bursting at the seams with nutrients and trace minerals. You’ll find things such as nitrogen, phosphorus, magnesium, potassium, calcium, and sulfur. While the percentages may not seem that high, they are in a format that is readily absorbed by plants.

Many commercial fertilizers have high levels of minerals but they are not in a format that can actually be absorbed by the plant. This means that most of the nutrients aren’t actually utilized by the plant and are wasted. With worm castings, the nutrients and minerals are in the perfect format to be absorbed and utilized immediately. This helps provide an immediate boost to plants. 

Regardless of what kind of potted plant you are trying to grow, pure earthworm castings from Simple Grow can make a big difference. The ideal way to apply it is to mix about 20-30% worm castings into the soil of the potted plant.

Many people combine it with compost and other additives to create an ideal growth environment. The good news is that you can’t really use too much worm castings as they will never burn your plants. Using a higher percentage of worm castings may provide you with even better results. 

Grow Bigger Plants with Simple Grow

Do you wish your plants would grow bigger? Was your garden less than it should've been last year?

If you're tired of growing puny vegetables and fruits, it's time for an upgrade...Simple Grow Worm Castings!

What are worm castings? Another term for worm manure. Why would you want to use it in your garden, raised beds, and house plants? Because it makes them grow bigger, faster and healthier...with no chemicals!

How do worm castings do this? It's like giving your plants a powerful multivitamin with everything they need to grow. Trace minerals, nutrients, and most importantly...worm castings are chock full of beneficial microbes. Why does that make a difference?

In recent years, we've learned the importance of gut bacteria for humans and know that it impacts so many different parts of our health. The same thing applies with worms. Gut bacteria from the worm's digestive tract gets into the soil from the worm castings and promotes plant health. Plants have a symbiotic relationship with the microbes from the worm's digestive tract. Plants respond to it and grow really big...really fast!

If you've never tried worm castings before, you owe it to yourself to give them a try. Instead of using traditional chemical fertilizers from the big box store, why not try fresh, certified organic worm castings this year? You'll be able to grow bigger, healthier plants that you actually can feel good about eating. 

Take advantage of our special bundle sale on 25lb bags today!


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