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Can You Grow Cannabis with Miracle-Gro Soil or Nutrients?

Miracle Gro Plant Food is Not Suited to Growing Marijuana!

Many of us have grown up seeing Miracle-Gro being used in our homes, so we know that it works for ‘regular houseplants’. Cannabis is just a tough weed, so Miracle-Gro should be great for it, right?

The biggest problem with the standard Miracle-Gro nutrient formula is that it’s one formula for the entirety of the plants life cycle. Even if Miracle-Gro is good one for one stage of your plants growth, it won’t be good for all of them. The ratio of nutrients your plants need changes drastically between seedling and full flower, and marijuana needs a nutrient system to accommodate for those changing nutrient needs.

Avoid Miracle-Gro Soil for Growing Weed!

Do not use “Miracle-Gro” soil or any soil that has “extended release” nutrients for growing cannabis. These types of soil will continue to release nitrogen to your plant roots for up to 6 months. This can cause deficiencies or burn your cannabis plants in the flowering/budding stage, reducing your overall yields. I have seen growers successively grow cannabis in Miracle Gro, but many of them struggled with nutrient problems in the flowering stage (like the following) even though plants were healthy throughout the vegetative stage.

What’s even worse than the standard Miracle-Gro nutrients is Miracle-Gro soil. Standard Miracle-Gro soil has “time-released” nutrients which contain high levels of nitrogen. While this formula will work okay in the cannabis vegetative stage (the first stage of life), the nutrients will continue to be slowly released throughout the plant’s life including during the cannabis flowering stage, which is not good.

Standard Miracle Gro nutrients contain too much nitrogen and not enough of other nutrients for your cannabis flowering stage, and as a result of the time-released nutrients you will notice that your leaves in the flowering stage will get nutrient burn and your buds just won’t grow as big as they could. Learn what you can do to make sure buds grow as big as possible!

Important: Do not use “Miracle Gro” soil or any soil that has “extended release” nutrients. These types of soil will continue to release nitrogen to your plant roots for up to 6 months. This can burn your cannabis plants in the flowering/budding stage and reduce your overall yields.

There’s nothing inherently wrong with Miracle-Gro nutrients, and if you’re willing to learn about nutrients, you can use the various different formulas and get a cannabis plant to grow. For example if you’re using regular soil, you could use the standard Miracle-Gro formula for vegetative, and their “bloom” version for the cannabis flowering stage.

Yet there’s so many nutrient systems that are specifically formulated to grow a plant like cannabis. Why not choose to get better cannabis nutrients that will almost always produce better results? Some options like Dyna-Gro are priced about the same as Miracle-Gro nutrients, but you will consistently get bigger yields and more flavorful buds.

Can You Grow Cannabis with Miracle-Gro Soil or Nutrients? Miracle Gro Plant Food is Not Suited to Growing Marijuana! Many of us have grown up seeing Miracle-Gro being used in our homes, so we

Actually a great potting soil.

  • Aug 21, 2012
  • #1
  • Lester Freeman
    Well-Known Member

    Now, I guess a lot of farmers will spit on you and your meds if you grow in Miracle Grow, and I want to know why.

    First, lets examine pictures of my budding OG, which is producing some very good buds that will be highly medicating, this was grown in Miracle Grow potting mix and with a very stable pH of 7.9 or 8

    With a pH of 8, there has been no deficiencies, and overall no real issues using Miracle Grow, and a pH of above 7 ( which I’ve read isn’t recommended for soil growing ).

    Thanks for looking!

    420 Magazine®
    Creating Cannabis Awareness Since 1993

    • Aug 22, 2012
  • #2
  • Jimmycricket
    Nug of the Month: Feb 2014

    What it is, is MG soil has slow release chem nutes. If you wanna do organic obviously that wont work anymore. Also it just becomes a bit harder to judge how much extra nutes you can add in since you have those slow release ones in there. Plus since slow release chem nutes are almost always water soluble if the plant gets a lot of watering (aka it rains) it will get over nuted most of the time.

    Personally I feel if you cool with it then I am all for it. I just like the idea of organic myself. Just like if I have a choice between organic produce, or chemically grown monsanto shit, I definitely go for all natural. I guess thats why I have started trying to grow a lot of my own veggies n fruits.

    Every man dies, not every man lives.

    • Aug 22, 2012
    • Thread starter
    • #3
    Lester Freeman
    Well-Known Member

    What it is, is MG soil has slow release chem nutes. If you wanna do organic obviously that wont work anymore. Also it just becomes a bit harder to judge how much extra nutes you can add in since you have those slow release ones in there. Plus since slow release chem nutes are almost always water soluble if the plant gets a lot of watering (aka it rains) it will get over nuted most of the time.

    Personally I feel if you cool with it then I am all for it. I just like the idea of organic myself. Just like if I have a choice between organic produce, or chemically grown monsanto shit, I definitely go for all natural. I guess thats why I have started trying to grow a lot of my own veggies n fruits.

    There is both water-soluble and water-insoluble nitrogen, nitrogen toxicity in an alkaline environment is possible, but for a vegging cannabis plant, IMO, is unlikely. By the time the plant begins to flower, most of the slow release nutes that were found in the MG soil, will have been used up. They only last about 2-3 months. Also, I add an organic fertilizer that contains an 8-5-5 NPK ratio, with more slow-release nitrogen ( for vegging ). Also it has the organic part with added bone meal/meat meal.. it feeds up to 2-3 months.

    Now that you are mentioning organic this , and organic that, please read this thread:
    420 Magazine ®

    If an organism soley relied on organic compounds to survive, they would die. The fact is everything needs inorganic metals, and alkali metals to survive. The idea of being “fully organic” is part of a marketing agenda.

    420 Magazine®
    Creating Cannabis Awareness Since 1993

    Now, I guess a lot of farmers will spit on you and your meds if you grow in Miracle Grow, and I want to know why. First, lets examine pictures of my…