A block where several porches are done at once looks different from a block with one good porch on it. The effect is out of proportion to the number of houses involved — four or five in a row will change how the whole street reads.
Organizing it is easier than people assume, mostly because it requires less coordination than it seems to.
Matching material, not matching displays
This is the thing to understand before anyone starts organizing.
A street reads as coordinated when the houses share a palette and share materials. It does not require identical arrangements, and identical arrangements actually look worse — a row of copies reads as a development, not a neighborhood.
What you want is the same straw, the same corn stalks, the same family of pumpkins, arranged differently on each porch according to what each entry needs. A colonial with a centered door does symmetry; the craftsman next door masses everything on one side. Same material, different composition, and the block hangs together.
Everyone orders their own
This is the part that surprises people. There's no group mechanism required — neighbors each order the package that suits their own porch, and because the material comes from the same source in the same season, it matches automatically.
That solves the awkward problems up front. Nobody fronts money for anyone else, nobody's stuck chasing reimbursement, and each household picks its own tier and its own add-ons without negotiating.
Somebody does need to say "we're doing this" and get people to actually order. That's the entire organizational burden.
Timing is worth coordinating
The one thing genuinely worth aligning is when everyone orders.
Delivery windows are assigned by metro and routed across every order in the market. Neighbors who order around the same time are more likely to land in the same window, which means the street fills in over days rather than over a month.
Ordering early in the season helps for the same reason. The later the order, the less room there is in the schedule.
What a committee actually helps with
If your neighborhood has an HOA and you want the common areas done as well — the entrance monument, the clubhouse, the mailbox cluster — that's a different conversation and it does need someone with authority.
Those spaces are quoted to scope rather than sold as packages. Bring the locations, rough dimensions, and photos.
The two efforts work well together and don't depend on each other. Individual homes can coordinate without the HOA doing anything, and the HOA can do the entrance whether or not any residents participate.
Set expectations about variation
Natural materials differ from batch to batch. Colors and varieties shift with the harvest, so two neighbors ordering the same package won't get identical pumpkins.
That's worth mentioning to anyone who expects uniformity, because the variation is what keeps a coordinated block from looking manufactured.