Here you will find some useful information on everything koi related.

Moderators: frankoi, Sopersonic74, Dixiedean

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By Dixiedean Site Admin Site Admin
#474 Hi peeps,

Here's a list of plants known to be harmful and toxic to fish. By no means exhaustive, it will give you an idea what NOT to plant around your pond.

Guess my Marijuana will have to go ! :lol:

ACONITUM (Aconite, Monkshood) roots, flowers, & leaves
Allamanda – all parts
Allspice- leaves,seeds
Alocasia leaves and stems
Aloe leaves
Amaryllis bulbs
Anemone – all parts
Angel Trumpet Tree (Datura Arborea) flowers & leaves
Anthurium all parts
Apple seeds contain hydrocyanic acid
Apricot leaves
Atropa Belladonna all parts, especially black berries
Autumn Crocus (C. Sativus, Saffron Crocus) bulbs
Azaleas (Rhododendorn) Leaves
Balsam Pear Seeds, Outer Rind of Fruit
Baneberry berries, roots
Beach Pea (Lathyrus Maritimus) stems
Betel Nut Palm all parts
Bird of Paradise Seeds
Bittersweet (Celastrus) berries
Black Locust Bark, sprouts, foliage
Black walnut hulls
Bleeding Heart (Dicentra, Dutchman's Breeches) foliage & roots
Bluebonnets (Lupinus) all parts
Blue-Green Algae Some forms toxic
Bottlebrush (Callistemon, possibly Melaleuca) flowers
Boxwood Leaves, stems
Buckeye (Aesculus, Horse Chestnut) sprouts and nuts
Buckthorn Fruit, bark
Buttercup sap, leaves, bulbs
Caladium – whole plant
California tern roots seeds
Calla Lily Leaves
Carolina jasmine – all parts
Castor Bean (Castor Oil) Beans, Leaves
Challice Vine All parts
Chenille plant
Cherry bark, twigs, leaves, pits
Cherry seeds contain hydrocyanic acid
Cherry Laurel (Prunus Varieties) all parts, seeds contain hydrocyanic acid
Cherry Tree Bark, twigs,l eaves, pits
Chinaberry (Melia Azedarach) berries are poisonous
Choke cherry – all parts, especially the cherries
Christmas Berry (Heteromeles Arbutifolia, Toyon) berries are poisonous
Christmas Candle Sap
Colocasia all parts
Columbine (Aquilegia) all parts
Common Privet (Ligustrum) black or blue wax coated berries and leaves
Coral Berry (Symphoricarpos) seeds
Coral Plant Seeds
Crpcus all bulbs
Croton seeds
Daffodil Bulbs
Daphne Berries
Datura (Brugmansia) flowers, berries, & seeds
Day lily very poisonous to cats
Deadly Amanita All parts
Deadly Nightshade (Solanum Nigrum) all parts, unripe fruit & foliage
Death Camas All parts
Delphinium All parts
Destroying Angel (Amanita Phalloides, Death Cup) all parts
Dieffenbachia Leaves
Digitalis – all parts
Dogwood (Cornus) fruit slightly poisonous
Dumbcane (dieffenbachia) – all parts
Easter lily very poisonous to cats
Egg Plant All parts but fruit
Elderberry (Sambucus) red fruit poisonous, black & blue fruit o.k.
Elephant Ear (Colocasia, Taro, Caladium) stem & leaves
English Ivy Berries, leaves
Euphorbia (Splurge, Gopher Plant, Mole Plant) roots, sap
False Henbano All parts
Fly Agaric (Fly Amanita Mushroom) whole plant
Four O'Clock whole plant
Foxglove Leaves, seeds
Gelsemium (Carolina Jessamine) whole plant
Gloriosa lily – all parts
Golden Chain All parts, especially seeds
Hellebore (Ranunculaccea) all parts
Hemlock (Tsuga) all parts, especially roots
Hemlock, water All parts, especially roots and seeds
Hemlosk, poison All parts, especially roots and seeds
Henbane Seeds
Holly Berries
Honeysuckle Leave, flowers
Horse Chestnut Nuts, twigs
Hyacinth Bulbs
Hydrangea Flower bud
Impatiens (Balsam, Touch-Me-Not, Snapweed) whole plant
Indian Turnip(Jack-in-the-Pulpit) All parts
Iris (Blue Flag) Bulbs
Ivy (Hedera) all parts
Jack-in-the-pulpit – all parts
Japanese laurel – all parts
Jasmine berries
Java Bean (Lima) Uncooked bean
Jerusalam Cherry (Solanum Pseudocapsicum) fruit & leaves
Jimsonweed Leaves, seeds
Juniper (J.virginiana) Needles, stems, berries
Lanbkill (Kalmia Angustifolia, Sheep Laurel) leaves
Lantana Immature berries
Larkspur (Delphinium) foliage & roots are dangerous, seeds may be fatal
Laurel All parts
Lily of the Valley All parts, including water
Lobelia leaves
Locoweed All parts
Locust bark,leaves, seeds
Lords and Ladies All parts
Lupine (Lupinus) seeds
Machineel all parts
Marijuana all parts
May Apple (Podophullum) all parts
Mescal Bean Seeds
Milkweed (Asciepias) all parts, especially sap
Misteltoe Berries
Moccasin FLOWER (Lady Slipper, Cypripedium Spectabiles) all parts
Mock Orange Fruit
Monkshood Leaves, roots
Morning Glory All parts
Mountain Laurek (Kalmia Latifolia) young leaves & shoots, can be fatal
Mushrooms wild types
Mustard – roots and seeds
Narcissus Bulbs
Natal Cherry (Solanum) berries
Nicotiana (Flowering Tobacco) leaves
Nightshades (all) Berries, leaves
Oak Acorns, foliage
Oleander – all parts
Oleaner Leaves,branches,nectar of blossoms
Peach, seeds
Pear, seeds
Peony (Paeonia) all parts
Periwinkle (Vinca, Myrtle) whole plant
Philodendron Leaves, stem
Pikeweed Leaves,roots,immature berries
Pine sap
Pinks (Sweet William, Carnation, Dianthus) all parts
Plum, seeds
Poinsettia Leaves, flowers
Poison Ivy Sap
Poison Oak Sap
Pokeweed (Phytolacca, Pokeberry) roots are dangerous
Poppy (Papaver) all except California Poppy can be dangerous
Potato Eyes and new shoots
Privet berries, leaves
Prunus (many varieties) seeds, some parts
Ranunculus all parts
Redwood sap (from decks also)
Rhododendron All parts
Rhubarb Leaves
Rosary Peas Seeds
Rosemary (Rosemarius Officinalis) leaves of certain varieties are poisonous
Sage (Salvia) leaves of certain varieties are poisonous
Scotchbroom (Cytinsus Scoparious) seeds, invasive
Senecio whole plant of some species
Skunk Cabbage All parts
Snapdragon all parts
Snow Drops All parts, especially bulbs
Snow on Mountain All parts
Solanum (Nightshade) all, especially some berries
Squirrel Corn (Dicentra Canadensis, Bleeding Heart) all parts
Stramonium (Jimson Weed, Datura) all parts
SUMAC (Rhus) all parts
Sweet Pea Seeds and fruit
TANSY (Tanacetum) all parts
Taro – all parts
Tiger Lily all parts
Toadstools can be fatal
Tobacco Leaves
Tomato foliage & vines
Trumpet vine – all parts
Tulip bulbs
Virginia Creeper Sap
Wisteria All parts
Yam Bean Roots, immature polds
Yew (American, English, Japanese) Needles, seeds
By mawibri Sponge Cake Sponge Cake
#64076 I had an Arum lily type plant growing in the pond last year, as it started to wilt in the frost I cut it back, unfortunately the sap from the cuts leaked into the pond, I had to retrieve all the fish to the bath and change the water as they had started to struggle some were on their sides and near death, fortunately I only lost two goldfish. The lily is now in a flower bed 30 feet from the pond!!