There are several types of MG, what are you using? Do you know what's in the bag/box? If not, go to Scotts.com and find out. The all purpose stuff is 24-8-16, be very careful. What type of soil are you using? If you are using MG soil and it says no nutes needed for 60 days, I would listen to them. When you do start, I would go with 1/2 strength or less. Try and be patient, you can always step it up it's harder to undo damage that is already done.