- Organic rock phosphate fertilizer is a slow-release fertilizer that is made from ground-up rock phosphate. It is a natural and sustainable fertilizer that is allowed for use in organic farming systems.
- Rock phosphate is a sedimentary rock that is rich in phosphorus. It is the main source of phosphorus for the production of commercial phosphate fertilizers. However, rock phosphate is not very soluble in water, so it is not directly bioavailable to plants.
- Organic rock phosphate fertilizer is treated with organic acids and other organic compounds to make it more soluble and bioavailable to plants. This makes it a more effective fertilizer than untreated rock phosphate.
- Organic rock phosphate fertilizer is a good source of phosphorus for all types of plants, including vegetables, flowers, trees, and shrubs. It is especially beneficial for plants that have a high phosphorus requirement, such as tomatoes, peppers, and corn.
Benefits of using organic rock phosphate fertilizer:
- Organic rock phosphate fertilizer is a natural and sustainable fertilizer.
- Organic rock phosphate fertilizer is a slow-release fertilizer, which means that it releases phosphorus into the soil over time. This helps to prevent nutrient runoff and leaching.
- Organic rock phosphate fertilizer is a good source of other essential nutrients, such as calcium and magnesium.
- Organic rock phosphate fertilizer is relatively inexpensive.
How to use organic rock phosphate fertilizer:
- Organic rock phosphate fertilizer can be applied to soil in the fall or winter, so that it has time to break down before the growing season begins. It can also be applied in the spring, but it is important to water it in well to help it break down.
- The recommended application rate for organic rock phosphate fertilizer varies depending on the phosphorus level of your soil and the type of crops you are growing. For most crops, the recommended application rate is 2-5 pounds per 100 square feet of garden space.
- Organic rock phosphate fertilizer can be applied by broadcasting it over the soil surface or by incorporating it into the top few inches of soil. If you are broadcasting the fertilizer, be sure to water it in well.
Tips for using organic rock phosphate fertilizer:
- Organic rock phosphate fertilizer is most effective in acidic soils. If your soil is alkaline, you may need to amend it with sulfur or other acidifying materials before applying rock phosphate.
- Organic rock phosphate fertilizer can take several years to have a significant impact on crop yields. However, it is a good long-term investment for improving soil fertility.
- Organic rock phosphate fertilizer can be combined with other organic fertilizers, such as compost and manure, to create a complete fertilizer program.





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