Will Miracle-Gro Hurt Worms?. Today I’m going to talk about soil again, more specifically bad soil. Miracle-Gro all-purpose potting mix is designed to be practical for almost any form of gardening. Re: Is Miracle Grow bad? It's more like old vitamins in your medicine shelf. Miracle Grow has been around for decades and wouldn't be as popular as it is if it didn't work. Lv 4. As you mix the Miracle-Gro fertilizer with the recommended amount of water, you may worry about the impact of the chemicals on the local earthworm population. Can Miracle Grow go bad? Miracle-Gro provides an insane amount of nitrogen to plants so that they grow big, bushy, green, and really fast. I’ve switched my growing medium to peat moss, black kow, and perlite, and I’ve switched all my fertilizers to Ferti-Lome. Earthworms may be good for garden-soil tilth and productivity, but they may still be bad for the larger environment, including forests. Relevance. University and hospital research has shown that the plants are not toxic to humans or pets. My garden has grown pretty well and I have harvested a lot of fresh produce from it. 1 decade ago. Answer Save. The Scott's Miracle-Gro line of pre-mixed soils includes specialty soils for a variety of plants and shrubs. I have had it for many years, can this stuff go bad or can I still use it? You just have to be a good enough grower to use it. by Rocketboy9 Hello again my fellow cultivators, I hope everyone’s day went as planned. When I allegedly grew cannabis in Texas I made a lot of mistakes and growing Miracle-Gro marijuana was one of the bigger ones. I have some powdered miracle grow that you mix with water. You can also feed your poinsettia every two weeks with Miracle-Gro® Indoor Plant Food. Miracle Grow fertilizers have been on the market for over fifty years. The problem with MG is that the nitrogen is derived from synthetic ammonium and nitrates, producing off-chemicals that are harmful to soil microbes, worms, and … All of Scott's Miracle-Gro soil mixes are perfectly safe for growing vegetables and other food crops. Thus while the plants will benefit briefly from the chemicals, the soil microbes which normally provide plant food, will suffer. So the best reason I can think of that Miracle Gro is bad is that it is not good for soil microbes. So is the Miracle Gro soil bad too? Fertilizer does not go bad. The rumor that poinsettias are poisonous has been around since 1919. Miracle-Gro marijuana gardening promoters forget to mention that Scotts' soils are known as fungus gnat farms and cause a lots of problems for marijuana. Favorite Answer. The salty chemicals in Miracle Gro are not in any of the food groups (protein, vitamins, minerals, or carbohydrates). I have been using that kind of soil and lasagna layers (soil, newspaper, leaves, compost; then repeat layers) to grow my garden for a couple years. willcinovid. 3 Answers. Today, I never use Miracle-Gro in […] These Miracle-Grow videos are sponsored, stealth advertisements for Miracle-Gro, rather than legit marijuana grow videos. Poinsettias Are Not Poisonous. I suspect that if they were as harmful to plant growth/vegetable productivity and soil health as many organic gardeners seem to think that the company/fertilizer formulas would not have lasted this long (and 90% of all gardens in America would be sterile dirt). Is not good for soil microbes the chemicals, the soil microbes safe for growing vegetables and other crops. To talk about soil again, more specifically bad soil the plants are in... An insane amount of nitrogen to plants so that they grow big, bushy, green, perlite. Enough grower to use it growing Miracle-Gro marijuana was one of the food groups protein. 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