We use both. We grind our pine straw, but you can use it as is. If we have plenty of pine straw in the fall we use it. Daylilies love it.You can use 1/4 ground pine bark just as well for your mulch. We work 1/4 inch ground pine bark into the compost of our raised beds .. ratio about 1 measure of pine bark to three measures of compost. Then we use it as mulch also.When we can get it at a good price we prefer cedar shavings for the best mulch and oh so pretty! Your daylilies will love it. We get it at Walmarts, (it is used for pet beds. We could get it last year on sale for $5.00 a bale, now it is almost $7.00 a bale. Snakes don't like cedar , so we love it for that reason, plus earth worms thrive in beds that have cedar shavings. In any case you can use Snapshot ( pre-emergent for weeds) then use 3 inches of either pine bark, 1/4 inch ground pine bark, or cedar shavings. Your daylilies will be happy with any of these. Happy gardening!
weednsmile