hello,what kind of junipers??are you talking of a large one such as a sand cedar tree or a western juniper tree or are these to be bushes and/or shrubs?if they are shrubs i think bulbs would be fine neer them,just mulch them along with the shrubs.it sounds like a nice contrast with bright lillies (or another bright flower produced from a bulb)would go great next to a dark green juniper.
wishing you luck,please let us know the results
frog