Ask a Canada Law Question, Get an Answer ASAP!
You cannot cancel it. This is a binding contract. You would be in breach of the contract if you refuse to lease out the house. You can be sued to compel you to adhere to the contract and/or for damages.
I am sorry this is not the answer you were hoping for but I know you need the right answer so that my answer does help.
These are not grounds for terminating the lease.
But you have to tell the tenants what you found out and if they want to get out of the lease you will have to let them.
I suggest having a lawyer tell them in a letter to protect yourself best.
Yes I know you are the landlord and want to get out. I am saying it's not enough for you to get out but if you tell them what your concern is they may want to get out.
I don't believe your saying they can put their own kids at risk if they move the planters is enough to get out of the lease.
I believe you can have a lawyer send them a letter and make it clear to them that this is what you discovered, you will agree to let them out but if they want to stay they need to understand that you are advising them of the risks and that you are not going to be liable but they are.
The lawyer will word the letter in a way that may scare them into leaving and if not at least will protect you from being sued successfully.
You are very welcome!