Plants that might be poisonous to Koi

Aloe - leaves
Allspice- leaves, seeds
Amaryllis - bulbs
Anemone – all parts
Anthurium all parts
Apricot - leaves
Azalea – all parts
Baneberry - berries, roots
Bird of Paradise - seeds
Black Locust Bark - all
Black walnut - hulls
Boxwood - leaves, stems
Buttercup - sap, leaves
Cactus
Caladium - leaves
Calla Lily - leaves
California tern roots seeds
Cardinal flower – all parts
Carolina jasmine – all parts
Caladium – whole plant
Cherry - all parts,
Chenille plant
Choke cherry – all parts
Colocasia - all parts
Coral Plant - seeds
Cyprus - seeds
Croton - seeds
Daffodil - bulbs
Datura - all parts
Day lily
Delphinium – all parts
Death Camas - all parts
Dumbcane (dieffenbachia) – all
Digitalis – all parts
Easter lily
Elephant's - ear all parts
Eggplant - all but fruit
English Ivy – all parts
Foxglove – all parts
Gloriosa lily – all parts
Hemlock - all parts
Holly - berries
Honeysuckle - all parts
Hyacinth - bulbs
Jack-in-the-pulpit – all parts
Japanese laurel – all parts
Indian Turnip - all parts
Iris - Blue flag
Jasmine - berries
Java Bean - uncooked bean
Lantana – all parts
Larkspur – all parts
Laurel - all parts
Lily of the valley- all parts
Lobelia - leaves
Locust - bark, leaves, seeds
Locoweed - all parts
Lupine – all parts
Marijuana - all parts
Mayapple - all parts
Mimosa – all parts
Mistletoe - berries
Mock Orange - fruit
Morning Glory - all parts
Mustard – roots and seeds
Narcissus – bulbs
Nightshade
Oak - acorns, foliage
Oleander – all parts
Peach- leaves
Philodendron – all parts
Rhubarb - Leaves
Pine - sap
Pikeweed - leaves
Poinsettia - leaves, flowers
Potato - eyes, new roots
Privet - berries, leaves
Prunus varieties - seeds, some
Ranunculus - all parts
Redwood - sap (from decks )
Rhododendron – all parts
Rhubarb - leaves
Snapdragon - all parts
Snowdrop - all parts
Sweet Pea - seeds & fruit
Taro – all parts
Tiger Lily - all parts
Tobacco - leaves
Tomato - leaves
Trumpet vine – all parts
Tulip - bulbs