re: Weed & Feed Question...

Weed and feed is a preemergent, it prevents new weeds from growing. It does not kill existing weeds. Ideally you put down preemergent every 3 months to prevent new weeds from growing, it's especially important in the late fall and late winter to prevent winter and spring weeds. Once your lawn is in full Growth as long as you cut it at the right length (long and thick) this will prevent most weeds from growing. I just spray what few weeds I do get in the spring and summer or pull them.

So yeah, if you have a bunch of weeds now you will need to spray them. Generally sprays work by preventing weeds from obtaining water, so if it rains hard right after you spray you may need to spray them again.