The best time to inject fertilizer through irrigation is in the last stages of irrigation. That is because water won’t wash away the fertilizer, and it will thus be in contact with the plants for a longer time.It will require you to understand several things to appropriately time it. You will have to know how long the water takes to reach the farthest point of your garden or land to know the ideal time to do it.If you mistime the fertilization process, the plants won’t get sufficient fertilizer for growth. You wouldn’t get the returns you yearn for.