How To Add Phosphorus To Soil 5 Organic Ways

To add compost to your soil, sprinkle 1 to 2 in (2. 5 to 5. 1 cm) of compost over bare soil and use a rake or a shovel to mix it with the top 3 to 5 in (7. 6 to 12. 7 cm) of dirt. [2] X Research source

It’s best to buy pre-made manure that’s been tested. That way, you know exactly how much of each nutrient is in the manure before you use it.

In general, the optimal range of phosphorus in a vegetable garden is 30 to 50 parts per million (ppm). [13] X Research source