Be warned that we are seeing significant damage to live oaks in this region (Florida) following use of herbicides containing metsulfuron methyl. The Scott's Company replaced atrazine with msm in their "Bonus S Weed/Feed" against our advice, and had to recall the product after a few months and pay homeowners for damage to lawns. No mention of payment for oaks, but it should be happening...

Here is an extension article we wrote on it:

http://edis.ifas.ufl.edu/fr400

Beware if you use these products (Blade, Manor, Mansion etc.) near oaks.