Unfortunately there are things such as poisonous pond plants. It is vital that you are aware of these types of plants so you will not include them in your beautiful pond and harm the wildlife within it. Over the next few minutes, I am going to provide you with a list of poisonous pond plants or ones that people speculate are poisonous.
The following plants are said to be poisonous to the fish that inhabit your pond: Allamada, Aloe, Baneberry,
Buttercup, Calla Lily, Chenille Plant, Day Lily, English Ivy, Bulbs of the Hyacinth, Iris, Jasmine Berries, Tiger lily, Tulip and many more. This is not meant to scare you when choosing your pond plants but to make you aware of the dangers.
There are many more poisonous pond plants such as the Wisteria, Daphne and the Milkweed. But don’t worry, it does not mean that you cannot plant these beautiful plants and flowers. The most recommended method is to place them strategically and carefully around your pond. Try not to place poisonous pond plants such as Azaleas and Snap Dragons directly next to your pond.
If you think that you may have planted any type of poisonous pond plants and that they are affecting your fishthen keep a close eye on your fish. Look for signs of sickness or a change in eating habits. Your biggest clue will be your fish dying. If this happens then you need to immediately remove the plants that you feel are causing the problem.
You need to also be aware of poisonous trees in the area surrounding your pond. Trees can shed their leaves, berries, seeds and pollen over great distances. Is your pond downwind of any trees? If so, which ones? Some trees, such as Laburnum, Taxus, Willows, Elder, Yew and Oak have poisonous entities that can infect your pond if you are not careful. Solanums, Sweet peas, Ivies, 
Rhubarb and all members of the potato and nightshade family should be avoided as well.
One solution is you can create a net that covers your pond from poisonous pond plants. This will not completely protect it but will definitely decrease the amount of damage that can be done. This doesn’t have to be a huge chore but it is recommended that you take a scan of your yard and pond area to identify any poisonous pond plants that you may already have.
