When I bought my first daylilies back in the early 90's the promo said that daylily growth habit was so dense, they'd block out any weeds.
Sure enough, the did and I never had to weed.
Then along comes rust where daylilies need more breathing room and that changes the picture.
I don't use Roundup since it has so many bad side effects.
I just weed on a regular basis and use some mulch in larger open areas.
