Urea is highly Nitrogen-concentrated, it should be used in combination with earth or sand before its application. Urea is highly Nitrogen-concentrated, it should be used in combination with earth or sand before its application. Urea should not be applied when the soil contains free water or likely to remain wet for three or four days after application. It contains minor or no combustible or explosive contents. This product must be applied properly, which will in turn promote green leafy growth, making your garden look lush. -Addition of these fertilizers will also raise the plant's photosynthesis process. -100% water soluble.GRADE A Premium quality urea fertilizer provides nitrogen, which promotes green leafy growth that not only makes your garden look lush, but is also important for photosynthesis. The key is that urea provides only nitrogen, no phosphorus or potassium so it is primarily used where the features of other fertilizers, such as bloom growth and vertical height may not be desired. Urea can also be dissolved in water as a 50/50 mix to use as a foliar spray. It should be applied according to the nitrogen fertilizer recommendations for the crop.