It is better to use this type of fertilizer late in the fall. This allows it to dissolve and spread over the entire area and give a good food source for plants or grass when the ground starts to warm in the spring. Spreading this type of fertilizer in the spring can harm plants as it will be to strong.
Early spring is the most efficient season for general use fertilizer. The nutrients can be taken up by the roots in time for the growth with in 3-4 weeks. Some winter blooming plants benefit just as greatly from a fall fertilizer application.
Fertilizer Urea is generally applied in the spring, however, corn yields have been acceptable when used in the fall as well. There are some studies that support continuous application of urea with yields even higher.
of course, it is better, but the usage of fertilizer may be according to
the claimatic condition and at the same time on sunny timings and concentration
of fertilizers should be carefully watched as per the provider.
A urea fertilizer is best used in the fall as it can then set into the ground to ready for the spring planting season. Spread in the fall and work into the soil in the spring to get the most benefit from this type of fertilizer. An organic blend works best in my experience.