David.
Astilbe would work, but consider the bed from all angles. I'm assuming that the front is where you took to picture from. While curb appeal is a legitimate consideration, you want to enjoy the spot from the back and. sides as well.
Things to consider are...
Spring color:
- bleeding heart
- bulbs such as daffodils, muscari, chionodoxa and corydalis
Fern and hosta are great at hiding the yellowing foliage of bulbs until the astilbe come in.
For winter interest, consider hellebore. They're evergreen and bloom in !id to
late winter.
Check with you're local garden center to see what's best in your area.