Plants Toxic to Koi Fishes | Koi Ponds India

Plants Toxic to Koi Fishes | Koi Ponds India

Beautiful Koi fish pond surrounded by plants are everyone's dreams. The garden around a koi pond is a mesmerizing sight. But a bit of caution is required while choosing the plants for the garden.

Plants which you may think may not be as lovely you think, it might be Toxic and some times fatal to your Koi.  As a koi fish owner, your topmost priority will be your Koi's health.

As we are the best Koi pond builders in India our mission is to design and build Koi ponds which are 100 % safe for the Koi fishes.

Landscape companies like us have enough know-how to choose which plant use near the vicinity of a Koi Pond. But some Koi owners are not so cautious with the choice of plants around the Koi Pond.

It should be noted that any kinds of plants debris which comes in contact with the pond water no matter, toxic or not, it will decrease the water quality.

Some toxic plants might be entirely toxic to fishes, and some may only have certain poisonous parts such as Leaves, Berries, sap, bulb or roots.

What are the types of toxins plant produces?

Many plants produce toxins that are toxic to certain organisms only like humans or pets, and others are only toxic to fish and insects. Certain types may only impact other plants, and but most of there are poisonous to everything.

Examples of plants which are poisonous to Koi fishes?

Yellow jessamine, azalea, hydrangea, Aloe vera Leaves, the heart of Jesus, sage, nightshade are some of them.

You surely don’t require these kinds of plants in or near the vicinity of your koi fish pond. As they could easily make your fish ill, behave strangely, upset its metabolism, or even cause death in worst cases.

We have listed various types of plant species, which are toxic to Koi fish to assist you in determining which plants to avoid while landscaping in and around ponds.

Sl No Local names  Plant Name Found in India Harmful Parts Of The Plant
1 Acokanthera ACOKANTHERA Yes Fruits & Flowers
2 Monk's hood ACONITUM Yes Roots, Bulbs, Flowers & Leaves
3 Kolambi Flower ALLAMANDA Yes All Parts Are / Can be Fatal
4 All Spices ALLSPICE Yes Leaves, seeds
5 Alocasia ALOCASIA Yes Leaves and stems
6 Aloe Vera  ALOE Yes Leaves
7 Hippeastrum AMARYLLIS / Hippeastrum vittatum Yes Bulbs 
8 Anenome ANENOME Yes All Parts Are / Can be Fatal
9 Brugmansia ANGEL TRUMPET TREE (Datura Arborea) Yes Flowers and Leaves
10 ANTHURIUM ANTHURIUM Yes All Parts Are / Can be Fatal
11 Apple APPLE Yes All Parts Are / Can be Fatal
12 Apricot APRICOT Yes All Parts Are / Can be Fatal
13 Desert Rose Adenium obesum Yes Sap
14 Azalea AZALEAS (Rhododendorn) Yes All Parts Are / Can be Fatal are fatal
15 Actaea BANEBERRY (Actaea, Doll's Eyes) Yes Red and White Berries, roots & foliage
16 Beach pea BEACH PEA (Lathyrus Maritimus)/ Lathyrus japonicus Yes Stems
17 Areca nut BETEL NUT PALM Yes All Parts Are / Can be Fatal
18 Rajamalli BIRD OF PARADISE BUSH (Caesalpinia) Yes Seeds
19 Bitter sweet BITTERSWEET (Celastrus) Yes Berries
20 Walnut BLACK WALNUT Yes Hulls
21 Bleeding Heart Dicentra, Dutchman's Breeches Yes Foliage & Roots
22 Bottle Brush Callistemon, Melaleuca Yes flowers
23 Buxus BOXWOOD (Buxus Sempervirens) Yes All Parts Are / Can be Fatal
24 Heart Of Jesus CALADIUM Yes All Parts Are / Can be Fatal
25 Indian Meadows CALLA LILY (Zantedeschia) Yes All Parts Are / Can be Fatal
26 Castor Oil Plant CASTOR BEAN (Ricinus Communis) Yes Seeds can be fatal
27 Chinaberry CHINABERRY (Melia Azedarach) Yes Berries can be fatal
28 Choke Cherry CHOKE CHERRY No All Parts Are / Can be Fatal
29 Toyon CHRISTMAS BERRY (Heteromeles Arbutifolia, Toyon) Yes Berries Can Be Fatal
30 chrysantha, Magpie COLUMBINE (Aquilegia) ,chrysantha Yes All Parts Are / Can be Fatal
31 Coral Berry CORAL BERRY (Symphoricarpos) Yes seeds
32 Coton Easter COTONEASTER Yes All Parts Are / Can be Fatal
33  Saffron Plant CROCUS Yes Bulbs
34 `Croton Petra CROTON Yes Seeds Are fatal
35 Daphne DAPHNE Yes Berries Can Be Fatal
36 Brugmansia DATURA (Brugmansia) Yes flowers, Berries, & seeds
37 Death Camas DEATH-CAMAS (Sygadenus Venous) No All Parts Are / Can be Fatal poisonous, roots are deadly
38 DIEFFENBACHIA  DIEFFENBACHIA (Dumb Cane) Yes All Parts Are / Can be Fatal, especially the sap
39 Dog wood DOGWOOD (Cornus) Yes fruit slightly poisonous
40 Brinjal EGGPLANT Yes all but fruit
41 Elder Fruit ELDERBERRY (Sambucus) Yes red fruit poisonous, black and blue fruit o.k.
42 Caper Spurge EUPHORBIA (Splurge, Gopher Plant, Mole Plant) Yes roots, sap
43 Indian Pokeweed FALSE HELLEBORE (Veratrun Viride and other species) Yes All Parts Are / Can be Fatal poisonous, root deadly
44 Foxglove FOXGLOVE (Digitalis Purpurea) , DIGITALIS Yes All Parts Are / Can be Fatal can be fatal
45  fly amanita Amanita muscaria - FLY AGARIC (Fly Amanita Mushroom) Yes All Parts Are / Can be Fatal
46 FOUR O'CLOCK FOUR O'CLOCK Yes All Parts Are / Can be Fatal
47 evening trumpetflower GELSEMIUM (Carolina Jessamine) Yes All Parts Are / Can be Fatal
48 Kanthel, Kariyilanchi GLORIOSA LILY Yes All Parts Are / Can be Fatal
49 Kani Konna GOLDEN CHAIN Yes seeds and pods may be fatal
50 RANUNCULACEAE HELLEBORE (Ranunculaccea) Yes All Parts Are / Can be Fatal
51 Tsuga HEMLOCK (Tsuga) Yes All Parts Are / Can be Fatal, especially roots
52 Hyocyamus niger HENBANE Yes All Parts Are / Can be Fatal
53 Europian Holly HOLLY (Ilex Aquifolium, Opaca, Vomitoria) Yes Leaves and Berries
54 Lonicera japonica HONEYSUCKLE Yes flowers and Leaves
55 Buck eye HORSE CHESTNUT (Aesculus, Buckeye) No All Parts Are / Can be Fatal
56 water bamboo HORSETAIL (Equisetum Hyemale) Yes All Parts Are / Can be Fatal
57 Hyacinth HYACINTH Yes Bulbs can be fatal
58 Hydrangea HYDRANGEA Yes All Parts Are / Can be Fatal
59 garden balsam IMPATIENS (Balsam, Touch-Me-Not, Snapweed) Yes All Parts Are / Can be Fatal
60 Indian Turnip INDIAN TURNIP Yes All Parts Are / Can be Fatal
61 Violet Iris IRIS yes underground stemt, Leaves, and rhizomes
62 Hedera helix IVY (Hedera) Yes All Parts Are / Can be Fatal
63 Jack in the plupit JACK-IN-THE-PULPIT (Arisaema Triphylla) Yes Root 
64 JAPANESE LAUREL JAPANESE LAUREL Yes All Parts Are / Can be Fatal
65 evening trumpetflower JASMINE, YELLOW Yes All Parts Are / Can be Fatal
66 Butter Bean JAVA (LIMA) BEAN Yes uncooked bean
67 JERUSALEM CHERRY  JERUSALEM CHERRY (Solanum Pseudocapsicum) Yes fruit and Leaves
68 evening trumpetflower JESSAMINE (Gelsemium Sempervirens) Yes Berries are fatal
69 Ummam  JIMSON WEED (Datura Stramomium, Thorn Apple) Yes All Parts Are / Can be Fatal
70 Lamp kill LAMBKILL (Kalmia Angustifolia, Sheep Laurel) Yes Leaves
71 Big Sage LANTANA CAMARA (Red Sage) Yes All Parts Are / Can be Fatal, green Berries are fatal
72 Delphinium malabaricum / LARKSPUR  (Delphinium) Yes All Parts Are / Can be Fatal
73 Mountain Laurel LAUREL (Primus varieties) Yes All Parts Are / Can be Fatal can be fatal
74 Lily LILY (Lilium) Yes Easter lilies, Peace, Peruvian, and Calla lilies
75 Convallaria Majalis LILY-OF-THE-VALLEY (Convallaria Majalis) Yes All Parts Are / Can be Fatal
76 Cardinal flower LOBELIA (Cardinal Flower) Yes All Parts Are / Can be Fatal
77 Small Leaved Locoweed  LOCOWEED (Astragalus, Oxytropis) Yes All Parts Are / Can be Fatal
78  false acacia LOCUST Yes bark,Leaves, seeds
79 Naroow leaf lupin LUPINE (Lupinus), BLUEBONNETS Yes Seeds
80 Manchineel tree MACHINEEL Yes All Parts Are / Can be Fatal
81 Cannabis MARIJUANA Yes All Parts Are / Can be Fatal
82 Podophyllum emodi Wall MAY APPLE (Podophullum) Yes All Parts Are / Can be Fatal
83 Peyote MESCAL (Peyote) No All Parts Are / Can be Fatal
84 Indian milkweed MILKWEED (Asciepias) Yes All Parts Are / Can be Fatal, especially sap
85 Mimosa pudica / touch me not MIMOSA Yes All Parts Are / Can be Fatal
86 Honeysuckle Mistletoe (Loranthus longiflorus) MISTLETOE Yes All Parts Are / Can be Fatal, Berries can be fatal
87 Moccasin flower MOCCASIN FLOWER (Lady Slipper, Cypripedium Spectabiles) No All Parts Are / Can be Fatal
88 Fuzzy mock Oranges MOCK ORANGE (Philadelphus) Yes All Parts Are / Can be Fatal
89 Wolf's bane MONKSHOOD (Aconitum) Yes foliage and fleshy roots
90 MORNING GLORIES  MORNING GLORIES (Ipomea) Yes All Parts Are / Can be Fatal
91  LAUREL MOUNTAIN LAUREL (Kalmia Latifolia) Yes young Leaves and shoots, can be fatal
92 Death cap, Web cap, Autumn Skullcap, deadly dapperling Amanita fungi, Amanita virosa, Destroying Angel Yes All Parts Are / Can be Fatal Are Fatal
93 Mustard MUSTARD Yes Roots & Seeds
94 Daffodil NARCISSUS (Daffodil) Yes bulbs can be fatal
95 Jerusalem cherry NATAL CHERRY (Solanum) Yes Berries
96 Flowering Tobacco NICOTIANA (Flowering Tobacco) Yes Leaves
97 Night Shade NIGHTSHADE (European Bittersweet, Horse Nettle), Black Night Shade,  ATROPA BELLADONNA Yes all, especially unripe Berries
98 Silver Oak ,Indian oak, Small indian oak OAK Yes Foliage and Fruit Of OAk Tree
99 Oleander  OLEANDER (Nerium Oleander) Yes All Parts Are / Can be Fatal poisonous including smoke if burned
100 Peony PEONY (Paeonia) Yes All Parts Are / Can be Fatal
101 Tindiyam PERIWINKLE (Vinca, Myrtle) Yes All Parts Are / Can be Fatal
102 Heart-leaf Philodendron PHILODENDREN Yes Leaves and sap
103 Pine PINE Yes Sap
104 Carnation PINKS (Sweet William, Carnation, Dianthus) Yes All Parts Are / Can be Fatal
105 Prunus PLUM  Yes Seeds
106 Indian Pokeweed POKEWEED (Phytolacca, Pokeberry) Yes All Parts Are / Can be Fatal
107 Poinsettia POINSETTIA (Euphorbia Pulcherrima) Yes All Parts Are / Can be Fatal, Leaves and sap can be fatal
108 നഞ്ച് POISON IVY (Rhus Radicans) Yes All Parts Are / Can be Fatal
109 Punjab Poison Oak    POISON OAK (Rhus Diversioba, Rhus Toxicondendron) Yes All Parts Are / Can be Fatal
110 Poppy POPPY (Papaver) Yes All Parts Are / Can be Fatal
111 POTATO POTATO Yes sprouts and foliage can be fatal particularly ornamental varieties
112 Nilgiri Privet Common PRIVET (Ligustrum) Yes Black and blue wax coated Berries and Leaves
113 Plum PRUNUS (many varieties) Yes Seeds
114 Buttercups RANUNCULUS Yes All Parts Are / Can be Fatal
115 Indian Red Wood REDWOOD Yes Sap From Deck Also
116 Azalea RHODODENDRON (Azalea) Yes All Parts Are / Can be Fatal can be fatal
117 Amlavetasa RHUBARB (Rhenum Rhaponticum)/ Rheum webbianum - Indian Rhubarb Yes All Parts Are / Can be Fatal
118 Rose mary ROSEMARY (Rosemarius Officinalis) Yes Leaves of certain varieties are poisonous
119 Scarlet Sage SAGE (Salvia) Yes Leaves of certain varieties are poisonous
120 Scotch broom SCOTCHBROOM (Cytinsus Scoparious) Yes Seeds, invasive
121 SENECIO SENECIO Yes All Parts Are / Can be Fatal of some species
122 Antirrhinum SNAPDRAGON (Antirrhinum) Yes All Parts Are / Can be Fatal
123 Snow drop SNOWDROP (Galanthus) Yes All Parts Are / Can be Fatal
124 മണിത്തക്കാളി SOLANUM (Nightshade) Yes All, especially some Berries
125 Naalumani poovu SQUIRREL CORN (Dicentra Canadensis, Bleeding Heart) Yes All Parts Are / Can be Fatal
126  Ummam STRAMONIUM (Jimson Weed, Datura) Yes All Parts Are / Can be Fatal
127 Chippamaram SUMAC (Rhus) Yes All Parts Are / Can be Fatal
128 Sweet Pea SWEET PEA (Lathyrus) Yes Stems
129 Tansy TANSY (Tanacetum) Yes All Parts Are / Can be Fatal
130 ചേമ്പ് TARO (Colocasia, Elephant's Ear) Yes Stem and Leaves
131 ടൈഗർ ലില്ലി TIGER LILY (Lilium Tigrinum) Yes  All Parts Are / Can be Fatal
132 കൂണ്‍ TOADSTOOLS Yes All Parts Are / Can be Fatal can be fatal
133 പുകയില TOBACCO Yes All Parts Are / Can be Fatal
134 Tomato TOMATO Yes foliage and vines
135 Odumulla TRUMPET VINE Yes All Parts Are / Can be Fatal
136 ലില്ലിച്ചെടി TULIP (Tulipa) Yes Bulbs of some varieties
137 Sadapushpi VINCA (PERIWINKLE) Yes All Parts Are / Can be Fatal
138 Taxus-ടാക്സസ് YEW Yes Foliage, bark, seeds

This list does cover some of the more common plants which are often used by landscapers and some are invasive species which grows naturally. Detail studies are always necessary before incorporating any plant in and around your pond to ensure the safety for fishes.

When you create a garden around a fishpond, the plants you should choose should adjust to the ecosystem and blend with the surroundings. And most importantly they should not add any toxins to the pond water.

Remember not to position a pond near to poisonous trees like oak. If there is any doubt that you may have inadvertently planted poisonous plants, get rid of it quickly and closely monitor your fishes behaviour for at least a week.
Kindly contact us for any help and support.