I use shredded hardwood.

Thanks I use the black one on all my other flowers and i was want to do the same with my Day lillies

Two things to remember about colored mulch. Black will absorb the heat; so if heat &/or lack of water is a concern, I'd pass up black. Black would be better in colder climates. Also, I've read in multiple places that for whatever reason [no one seems to know] red seems to attract a lot of ants. Which leaves brown or undyed as the best choices.

I've gotten great results with pine straw. It has a very natural look, feeds the daylilies as it breaks down, and, best of all, is lightweight to tote around.

I too use pine straw [needles] and it works well. It helps that I can get all I need for free!