Is it true?

1. Never heard that! I have daffs & tulips growing close together and they seem to like one another just fine!

2. Vines (i.e. climbing plants, I presume) on a good strong building do no harm whatsoever. However, the shear weight of climbing plants can occasionally pull rendering off a wall. It is not the plant at fault here, but the quality of the wall that causes dampness, etc. It is important not to let large climbing plants reach guttering as they can damage this - particular Parthenocissus tricuspidata, which can cover a hugh area of a building and climb several stories high!

3. Never heard this. Some carnivorous plants emit a scent like rotting meat to attract flys, but then they eat them, so solve the problem!

Thanks for the knowledgeable response Sid....

Thanks for the knowledgeable response Sid....

You're welcome :-)