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4 Things To Know Before Choosing Your Marijuana Fertilizer

Trying to find the best fertilizer for weed? Growing marijuana is now legal in many states and figuring out the best way to go about it can be a challenge. Making sure that your marijuana plants get the nutrients they need to thrive is critical.

If you want to grow thick, healthy marijuana, the fertilizer you use can make all the difference. Here are a few things you'll want to think about when choosing a marijuana fertilizer.

Chemicals or No?

Imagine you start growing marijuana and you go down to the local big box store to pick up some fertilizer. You look through the gardening center and see product after product that all say they're the best for your plants. After suffering from information overload, you grab the one with the best-looking package and go on about your day. You use the contents of the bag according to the directions and pretty soon, you're growing some nice-looking cannabis plants.

At first, it might seem just like any other marijuana that you've used or seen before. However, what you don't notice could hurt you. What do you have to worry about in this scenario? You or your customers are probably ingesting dangerous chemicals and substances. Although it looks like normal marijuana, the harmful and carcinogenic chemicals in the generic fertilizer you bought are most likely making their way into your body with every breath. Studies have shown that many fertilizers have extremely dangerous chemicals and substances in them. These chemicals can lead to many different types of cancer, kidney damage, liver damage, and urinary tract issues. In addition to synthetic, cancer-causing chemicals, many fertilizers also have heavy metal contents. You'll find a scary mixture of aluminum, mercury, cadmium, and lead in some fertilizers.

You don't have to be a doctor to know that it's probably not the best stuff you could ingest. There's a reason that everyone freaks out about lead paint. Now imagine just breathing that in or ingesting it.

If you have a large agricultural, landscaping, lawn care or gardening business, buying worm castings in bulk is more cost-effective and convenient for you. At Simple Grow, we guarantee a high-quality product every time and we can have your order delivered right at your doorstep. Contact us now so we can give you a free custom quote.

“Studies have shown that many fertilizers have extremely dangerous chemicals and substances in them.”

If you're trying to start a legitimate marijuana business, the last thing you want to do is open yourself up to a lawsuit in today's litigious society. If you're just growing it for yourself, then you definitely don't want to get cancer from it. When trying to pick the best fertilizer for cannabis, whether or not it's chemical-free should be one of the first things you consider.

Aeration & Moisture

When trying to select from the vast array of fertilizers out there, consider the moisture content and aeration of the soil. One of the most important things to think about when growing weed is that you need the soil to be moist and retain some water without drowning the plant.

In addition to the moisture content of the soil, you'll want to ensure that it's properly aerated. Getting oxygen to the roots of the plant can make all the difference in the growth of your plants. What does this have to do with the fertilizer that you pick? Some are actually naturally inclined to help in both areas.

The shape of certain fertilizer and soil supplement particles helps it to avoid getting packed down. Some can also regulate the moisture around the plant to make sure that it gets just the right amount of water when it needs it. The best fertilizer for weed can give your plants a boost just from the way it's structured.


If you've ever partaken before, you probably noticed a specific taste. Some strains have a very stale, almost sterile taste to them. A lot of factory-farm produced weed tastes terrible and bitter when it's smoked. Much of this taste comes from the fertilizer that they use on the plants while growing them.

If you want to avoid that nasty taste in your own plants, the type of soil supplement you use will play a big role in that. Going with an all-natural, organic marijuana fertilizer will help eliminate that disgusting taste when you or your customers decide to light up.


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Yield and Germination Rate

Regardless of whether you're looking at this for business purposes or you just want to grow more of your own weed, the germination rate and the yield are important factors. The best fertilizer for weed can help in both areas. Earthworm castings, for example, have been shown to speed up germination rates for seeds and get marijuana plants growing faster. The abundant natural hormones and microbes in the worm castings help seeds sprout faster and can actually increase yield rates of marijuana plants.

PH Management

When growing cannabis, one of the most critical factors to watch is the PH of the growing medium. You can’t expect to just throw your plants in any soil mixture and watch them grow. The PH has to be within the correct range for optimum cannabis growth. Most experts agree that the optimal PH range for weed growth is between 6.0 and 7.0. Getting it down closer to between 6.0 and 6.5 is even better.

Many marijuana growers find themselves constantly checking the PH of their soil and making adjustments throughout the grow. This is done by adding nutrients and chemicals to the mixture to adjust it up or down. By adding 20-30% worm castings or more to the soil mix, you’ll be able to more easily manage the PH. This will make your life easier and help your weed grow faster and bigger. The PH of pure earthworm castings is typically around 7.0 – a neutral rating. When you add that to another medium like peat with a slightly acidic PH of 6.0, the mixture together will balance out to somewhere around 6.5. You’ll still want to test the PH periodically throughout your grow, even if you use worm castings. However, you may not need to check it as much and it won’t fluctuate as much as normal. The worm castings will act like a sort of PH regulator that attempts to bring the PH back to the ideal range, regardless of which direction the PH is headed.

Picking the Best Marijuana Fertilizer

Ultimately the decision comes down to picking which fertilizer is going to produce the healthiest plants and give you the most bang for your buck. There are a lot of good options out there, but science has shown that earthworm castings are the best soil supplement when you're growing marijuana. It's chemical-free, helps with aerating the soil, ensures optimal moisture levels, and improves yield and germination rates.

Need a quote for more than 1 ton or a truckload of worm castings for your marijuana business? Contact us here.

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