- If plants are looking stunted, a phosphorus deficiency may be the culprit. Plants deprived of phosphorus will be slow growing. Fruit and flower production will suffer. Sometimes, plants lacking in phosphorus will develop purplish areas underneath its leaves. Applying fertilizer before planting and frequently during peak growing and production times helps to avoid these issues.
- Phosphorus is one of the macronutrients that plants must have in large quantities to grow properly. This particular mineral is essential to the plant for many reasons. First, it helps the plant to flower and fruit. Phosphorus is especially important for those growing fruits and vegetables. Second, phosphorus helps the plant to develop strong, healthy root systems. Good roots are necessary for the plant to grow and absorb water and other nutrients. Finally, phosphorus aids in the transfer of energy throughout the plant. Without it, nutrients will not reach all parts of the plant.
- Look at labels for the words "phosphate" or "phosphoric acid." It may also be listed as its chemical composition p2o5. Do not confuse phosphorus with potassium, which is sometimes also called "phosphate," but is a completely different kind of fertilizer. Unlike some other nutrients, phosphorus does not dissolve well into the soil. If your application is seeming to have no effect on your crops, it is probably because they haven't received it yet. Dig the fertilizer down into the dirt near the root systems to ensure that the plants can absorb it.
