I hosted a dinner for 25 last weekend and made a few centerpieces to complement vases with sunflowers and other autumn decor.
What you'll need:
Assorted vegetables and fruits
Nuts in shells, if in season (walnuts, Brazil nuts, almonds...)
Real or faux autumn leaves or bittersweet branches
Silver, gold and bronze spray paint
I've had the two cornucopiae for years, and I imagine they're readily available at a craft store. I spray painted mine matte bronze, long ago. Choose fruits and veggies with interesting shapes. I picked up a few artichokes, tomatillos (great, papery outer husks), pears and pomegranates. Indian corn would have been great, but I forgot to get some! I'll get some to fluff up for Thanksgiving...the spray painted food lasts for weeks! It was too early in the season for love apples and nuts in their shells...those varied shapes and sizes add visual interest. Spray which ever ones you like, different colors (let dry for a few hours) and leave some pieces in their natural color, for contrast. It was also too early for natural red and orange leaves, so I picked up some faux foliage at the craft store, along with raffia and spanish moss for filler.