u/Full_Illustrator_616

Just recently i made this flower garden in my front yard, i planted multiple perennials in it but my coral bells really don't seem to be taking. The garden is on quite a slope, i dont know if maybe they're getting too much sun, or not enough of something. Im pretty novice to gardening so any tips or tricks are definitely useful. We've been getting a ton of rain and even when we dont i make sure everything is watered every evening.
Thanks.