re: Is it too early to apply a weed and feed to my yard?

You know, I don't recall ever spraying it on clover, per se. Assuming it works, how long it takes will depend on the temp. The warmer/hotter the quicker. Someone else may have more experience with it on clover.

I recently took a chance and did something I've never done before- spray round-up during a warmer spell at this time of year (It was January).