Hi. I don´t use comercial EM´s. I make them. It´s pretty easy. You cook some rice without oils. Put them in a plastic box and cover the rice with some cloth with little holes. Then bury the box in a humid place with lots of plants. Wait for a couple of weeks and you have collected your own EM´s. The best part is that you get what work better in your own land. When you have collected them, put them in a bucket with molasses and a fish tank oxigenator and they will reproduce.
I take rain water 9 parts and the EM´s one part and spray the plants with it. Remeber that you need to mulch the soil or the EM´s will die fast.
Also, spray at the end of the afternoon.
Hope this helps you