HOA Homefront: Can the board mandate a switch to (or from) artificial turf?

Q: Our board has indicated that they plan to remove all turf from the front yards of our community and replace it with various types of non-turf plants. The vast majority of homeowners oppose such a plan. Can a board make a decision of this nature and magnitude without homeowner approval? Their decision would make a highly significant change to the appearance of our community. — F.G., Oceanside
A: I assume from your question the front yards in your community are a common area or under