One source I found suggests it starts to break down in 100 years. Get it as soon as Mon, Nov 16. Rock Phosphate - Organic Soft Rock Phosphate for Soil, Garden & Compost (35 Pounds) 5.0 out of 5 stars 1. The interesting thing to me is that this is not news. Don’t add it to your garden. These nutrient-rich fertilizers work with the soil rather than against it as chemical fertilizers do. That means it does not mix with water, and it is not available to plants. EITHER rock phosphate or soluble fertilizers will work equally well in a garden. I can’t wait that long for my tomatoes! It is a brown, granular material which softens up when wet. These fertilizers are commonly called “rock dust” and provide just the right amount of nutrients to make plants strong and healthy. I sure did notice the gloss it threw on their coats though, and I’m not kidding. Rock dusts are best applied in early spring. When I told the whole story to the elderly retired Ag extension agent who lived nearby, he gave me a big grin and explained the great ‘rock phosphate’ dilemma. Use of A.niger as bio-inoculant could be a sustainable approach to improve soil P availability, promote plant growth and alleviate adverse effect of salt stress. • “Rock phosphate should be applied in amounts that are two, four, or even up to 10 times the recommendations for phosphorus application indicated by soil tests for chemical fertilizers to allow for the low availability of phosphorous in rock phosphate” Almas Trading Group (ATG Holding) has positioned itself as a full-fledged Rock Phosphate, Phosphoric Acid & Fertilizers supplier in South East Asia, East Asia, Africa and Europe. This blog is written for gardeners, not farming operations. A quick check confirms what you are saying. For a lengthier explanation go to my website and look up “Why Organic Gardening Works”. One is hard rock phosphate (not very useful for produce) and the other is soft rock phosphate-the soft rock that we apply is called Cal-Phos and I think that it’s 0-3-0 (3% available and 20% total). Within 24 hours this soluble P starts being converted to labile P and eventually to stable P. What this means is that most of the phosphorus fertilizer you add to the soil is available to plants for a short period of time, and then it gets locked away in the soil. The levels on nutrients are so low as to be almost nonexistent. The available phosphate in rock phosphate is already very low. My understanding is that is the two primary ‘minerals’ that make up phosphorite (rock phosphate) are hydroxyapatite and fluoroapatite. Rock phosphate is a mined rock that contains limestone and clay as well as a high concentration of phosphorus (P). Since phosphorus is lacking in most soils, fertilizer applications are a must for superior results. If you look at the ingredient list on the product web site it has 1.4% calcium, 0.6% magnesium, virtually no cobalt, 1% iron and 1.3% sodium. So-called “superphosphate” and “triple phosphate” are synthetic fertilizers derived from reacting rock phosphate with sulfuric acid and phosphoric acid, respectively. Can you provide a reference to support the idea that rock phosphate is made available in 10 years? Rocks don’t dissolve very easily. In other words, organic fertilizer does not need to be derived from organic material: it only needs to relate to the cultivation in a way which serves the whole system in a sustainable, regenerative way. The Wikipedia reference does not even mention rock phosphate. If you use rock phosphate in your vegetable garden, you’ll have fewer pests, greater yields and richer flavor. Fungi ARE able to decompose rock phosphate much quicker than it decomposes in soil on its own. You can also use rock phosphate to encourage healthy tree and lawn root system development. Rock dusts are best applied in early spring. Plants do need more calcium and magnesium, but again most soil is not deficient of these nutrients. per 100 square feet (30.5 m.), but be sure to read about application rates on the package label as they may vary. Snowdrop – Should They be Transplanted ‘in the Green’? Most phosphate fertilizer comes from phosphate rock, a mineral mined in massive quantities of millions of tons from locations around the world. The very high-grade ore blends with medium-grade ore for direct sale. An organic, untreated Soft Rock Phosphate (0-3-0) with colloidal clay containing valuable trace minerals in addition to phosphorus. FREE Shipping on orders over $25 shipped by Amazon.

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