No - you should mow as soon as the majority of the weeds you see - 1st go to seed, and before the seeds harden and drop. Mow again later in the year to keep your clover from going to seed - it also keeps it vigourously growing into the fall if you knock off the seed heads inJuly and again in late August.

I use a bush hog - and I generally mow down to 6-8" -

FH