The following materials are not safe if toxic chemicals or insecticides have been sprayed on them. Before installing them in any cage, scrub all branches with a non-toxic disinfectant (such as diluted chlorine bleach) then rinse and dry well. I personally bake it in the oven in very low heat for 15 minutes to make sure all the insecticides are dead.
Ash, Aloe, Citrus (any), Com plant, Christmas, Cactus, Dogwood, Elm, Eucalyptus, Guava, Madrona, Magnolia, Manzanita, Nut (except Chestnut & Oak), Papaya, Pine, Prune, Ribbon wood, Rubber tree, Sassafras, Spider plant, Thurlow, Vine, Maple, Willows: Goat, Pussy and Weeping.
SAFE PLANTS INDOOR AND OUTDOORS
These are few plants which I personally use for my parrots:
Arum Lily, Arrowhead vine, Autumn Crocus, Australian Umbrella Tree, Avocado, Baneberry, Beans: Castor, Horse, Fava, Broad, Glory Scarlet, Runner, Mescal, Navy, Bulb Flowers : Amaryllis, Daffodils, Narcissus, Hyacinth and Iris ; Buttercup, Caladium, Canna Lily, Cardinal Flower, Cherry Tree, Coriander, Eucalyptus, (Dried, Dyed or Treated in Floral Arrangement): Grass: Johnson, Ground Cherry, Heaths: Kalmia Leucothoe, Piers: Holly, Honeysuckle, Horse Chestnut, Horse Tail, Ivy: English and others; Jack in the pulpit, Jasmine, Jerusalem Cherry, Lantana (Red Sage). Larkspur, Lily of the Valley, Arum , Locusts, May Apple, Mexican, Breadfruit, Mexican Poppy. Milkweed, Cotton, Mushrooms, Oak, Oleander, Oxalis, Parsley, Peace Lily, Periwinkle, Poison Hemlock, Poison Oak: Western & Eastem: Pokeweed, Potato Shoots, Pothos, Privet, Pyracantha, Rain Tree, Ranunculus, Rape Plant, Red Maple, Rhubarb Leaves, Rosary Pea Seeds, Sago Palm, Sand Box Tree, Schefflera, Skunk Cabbage, Sorrel (Dock), Snow Drop, Star of Bethlehem, Sweet Pea, Swiss Cheese Plant (Monstera), Umbrella Plant, Vetch: Hairy/Common: Virginia Creeper, Wattle, Weeping Fig, White Cedar (China); Berry, Wisteria, Yews.
Place gravel in a container for the parrot in replacement of soil and dirt.
CAUTION: Parrots love the soil and dirt. People think that wild birds eat soil and dirt to digest their food. Yes, it is true but indoor soil and dirt has too much fertilizer which is poison for the parrot.