I didn't take care of my wife's plants and they died.
How come? Would she have liked you to have taken better care of her plants?
Yes. It would have made her happy
Taking care of your wife's houseplants is an important responsibility since they are living things and it is wrong to let living things under your care die. You should talk to your wife and apologize for letting her plants die and take responsibility for their demise. Your wife may be upset but it's far better to be honest than to attempt to cover up your mistakes and make your wife even angrier when she finds out what truly happened.
Go screw yourself.
That's a mean thing to say. You did something wrong and should fix it. You can buy her new plants and apologize.