Is it too late to apply Corn Glutten for weed control

This is what Howard wrote in January:

Got some mixed feeling about using CGM this year, especially here in the South. The weather has been unusual to say the least. The many days of warm weather have been great for playing golf and gardening chores but the weed seed may already be germinated. Look at the costs. It might be better this year to apply a blended organic fertilizer and add dry molasses and/or a biological product.

If the forsythia have not stopped blooming in your area, then it is not too late.