As one who's run a landscaping business, I like to experiment with different types of fertilizer and soil amendments, and garden sulfur is something I've become very happy with. But like all fertilizers and soil amendments, garden sulfur will only work well in certain circumstances. Instead of garden sulfur, you may need garden iron, or garden phosphorus, or any number of things. Whatever the soil is deficient in, that's what you need to replenish. Because your average person can't really diagnose what's missing, and because often the soil needs a range of amendments, fertilizers are usually multipurpose, replenishing the soil with many different elements and nutrients. That's not a bad practice, and we often use multipurpose fertilizer in gardens and lawns. But to get the best results, it's good to know what your plants need. Below is explained not only the benefits of garden sulfur, but also to know what to look for to see if you should be using it in your garden.
Garden sulfur is very helpful in balancing the soil's pH level wherever it's absorbed. Depending on what kinds of plants you have, whether acid loving plants or alkaline loving, garden sulfur might be just the right thing for you. Garden sulfur will raise the acid level of the soil it's spread over so you can see why you would need to be careful. If you aren't sure whether your plants are acid loving or not, there are some things you can do to test them out before you just go fertilizing away. A few acid loving plants are azaleas, pine trees, rose bushes, hydrangeas, blueberries, and evergreens. One easy test is to spread old coffee grounds on the soil around the roots of your potential acid loving plants. This too will raise the acidity and pH of your soil. Even if you're not a coffee drinker yourself, you can usually go to your local Starbucks to get grounds. Many locations even have old coffee grounds in bags out on display for people to take for free, but even if they don't you can always just ask them for a bag.
Once you have your old coffee grounds, spread a little all around the roots of your plants, and water it into the soil. After that, watch very carefully to determine if the plants do better or if they do worse. If they do better, then you should think about picking up a bag of garden sulfur to do the real amendments and to bring the pH of the soil into optimum levels. It's not all that expensive and it has other healthy nutrients in it also. That being established, I know a few gardeners who advocate permanent use of coffee grounds as a fertilizer to the soil of their acid loving plants. Coffee grounds contain a wide variety of other soil nutrients such as Phosphorus, Potassium, Calcium, Magnesium as well as Sulfur. It's generally good and rich in nutrients. Just be careful with it. As I mentioned earlier, this definitely will lower the pH of your soil, which makes it more acidic. So don't just go putting it everywhere.
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Thanks for checking up on garden sulfur and its uses in yards. For more on fertilizing and taking care of a garden, check out another of my articles on organic lawn fertilizer.