The secret to few weeds is mulching, mulching and more mulching. I don't know what I would do if I didn't have everything heavily mulched here. The mulch keeps the moisture in during the hot summer and the weeds are few because there is really no place for them. Daylilies and shrubs and most everthing else has a thick carpet of fall leaves around them. If I ran out of leaves, I use straw bought in bales at a farm feed store.
I do use Preen on my Tall Bearded iris beds as those are the only gardenbeds not mulched here. I found that it lessens the weeds that want to take over there so that I am able to keep up with the weeding.
So my daylilies have never not been heavily mulched. Plus the mulch brings earthworms which help break it down and becomes the most wonderful nutrient rich soil and easy to dig also.