In the past, I have used flower boxes with coconut liners. I have had dead flowers by June every summer. This summer, I have had the most beautiful flowers all summer! The construction of the flower boxes with an internal water reservoir helps keep my flowers hydrated, and I didnt have to water every day. I will never use coconut liner again!

Pros: easy assembly, internal water reservoir, beautiful appearance
Cons: definitely more expensive than most flower boxes but worth every penny!