had "a" mushroom growing in a pot with a brugmansia growing.
What is yours? ...........picture please?

If it's really a mushroom I don't think the cat has anything to do with it and they normally aren't a problem. The cat peeing in your plant is though. Cat urine can kill your plant besides offending your sense of smell! lol A photo would be helpful.
Karyn

I need to figure out how to connect my camera to my computer and up load the pictures.

I had a crop of little tiny mushrooms come up in my tropical hibiscus pot last year. I think it came from the compost I used. It didn't seem to hurt it any.

If you use a bark mix or composted material, it is very possible to get mushroom looking stuff in the pot. It might be an indication that your brug is a little on the damp side.

Jack

I love mushroom compost and used to get it by the truckload. Can't find any here but it is good for your plants so don't worry about thier presence. You may be keeping the soil too moist though which is why they are probably sprouting up now. Mushrooms like wet, warm, shady spots. Too much moisture will turn your brug leaves yellow etc. I always let mine dry out a little on top before watering again.

Cat urine is acidic and wouldn't cause mushrooms to grow. If you think the cats are using your brugs for a litter box try smelling the soil- you will find out real quick lol...