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Rock phosphate is a part of Organic fertilizer and is allowed to be either mixed or used as it is, is can mixed with soil while preparing beds for new plants or during repoting of mature plant. Rock phosphate then in presence of organic matter becomes a good source of Phosphorus. Following are the suggested application rates. Suggested Application rate Bulbs: Add 1 tbsp per hole for average size bulbs, more for larger varieties. Mix thoroughly into soil, and water in well. Vegetable Gardens & Flower Beds: To prepare new gardens, apply 2.5-5 lbs per 100 square feet and thoroughly mix into the top 3” of soil. For new transplants, add ¼ cup per hole, mix into soil and water in well. To feed established plants, side dress ¼-½ cup in Fall or early Spring to promote fruiting and flowering during the growing season. Containers: For new plantings, add ¼ cup per gallon of soil and mix thoroughly OR add 5-10 lbs per cubic yard. For established plants, lightly mix 1 tbsp per gallon into the soil surface every 4 month during the growing season. Trees & Shrubs: Spread 1 lb per 1” of trunk diameter around the base outwards to the drip line, mix into soil surface and water in well. For new trees, prepare transplant hole and mix 1-2 cups with the backfill soil. Use the amended soil to fill in around the new tree, and water in well. Safety: The product is safe to use around children, but ensure hands are washed after each use. And yes we do not recommend this product for oral consumption as it is meant to be used as fertilizer.