This is a working list so feel free to email me at ilovelehighacres@gmail.com to add more!
Fruit
Vegetables
Grains
Spices
Herbs
Crumbs you sweep off of the counters and floors
Weeds but avoid weeds with seeds
Soft green prunings
Saw Dust
Pine Needles
Leaves
Hay
Egg Shells
Spanish Moss
Dead flowers from a bouquet
Straw
Cardboard
Vacuum Cleaner bag contents
Liquid from canned vegetables
Liquid from canned fruit
Tree bark
Hair Clippings
Grass
Seaweed
Coffee grounds and filters
Tea bags
Paper napkins
Pizza boxes
Paper bags
Crumbs from counters and floors
Pasta
Rice
Paper towels
Paper towel rolls
Stale crackers, cookies, bread, cereal, pretzels
Used paper plates (no waxy coating)
Nut shells (except walnut, which can be toxic to plants)
Pizza crusts
Cereal boxes
Wine corks
Old jelly, jam, or preserves
Stale beer and wine
Paper egg cartons
Toothpicks
Bamboo skewers
Paper cupcake or muffin cups
Used facial tissues
Hair from hairbrush
Toilet paper rolls
Old loofahs
Nail clippings
Urine
100% Cotton cotton balls
Cotton swabs made from 100% cotton and cardboard (not plastic) sticks
Cardboard tampon applicators
Dryer lint
Cotton rags or clothing
Wool clothing
Shredded Bills and documents
Envelopes (minus plastic window)
Pencil shavings
Business cards
Receipts (not thermal ones)
Contents of your vacuum cleaner bag or canister
Shredded Newspaper
Subscription cards from magazines
Leaves trimmed from houseplants
Dead houseplants and their soil
Flowers from floral arrangements
Natural potpourri
Used matches
Ashes from the fireplace, barbecue grill, or outdoor fire pit
Wrapping paper rolls
Paper table cloths
Crepe paper streamers
Latex balloons
Raffia
Jack o' Lanterns
Those hay bales you used as part of your outdoor fall decor
Natural holiday wreaths
Christmas tree (chipped)
Evergreen garlands
Fur from the dog or cat brush
Droppings and bedding from your rabbit/gerbil/hamsters, etc.
Newspaper/droppings from the bottom of the bird cage
Feathers
Alfalfa hay or pellets (usually fed to rabbits)
Rawhide dog chews
Fish food