Thanks for bringing up this topic. I was just discussing it with my wife yesterday and wanted to revisit it.
The answer to your question is no. Music does not affect plants. Scientific experiments have proved that music does not affect plants. The notion that music affects plants is a falsehood introduced in the 1960's and 1970's that has become a popular myth. The main culprit for introducing that falsehood is a book entitled The Secret Life of Plants, whose claims have since been discredited by scientific experiments. That book came out during the years when other false claims made millions of dollars for their producers, books like Chariots of the Gods, as well as books and movies about the Bermuda Triangle and Bigfoot.
The Secret Life of Plants, and the discredited notion that music could have an effect on plants set back the study of plants for many years. However new studies have found that plants do have a kind of intelligence, a plant intelligence, that functions with chemicals. Here is a fascinating article, The Intelligent Plant
, that discusses current scientific experiments about how plants appear to have awareness of their surroundings and many of the amazing things they can do through the sensitivity of their roots. It also discusses how notions like music affecting plants are a myth.
It may be an interesting experiment to do and then assign the article for the class to read, as an exploration of how unscrupulous authors basically lie for profits and how these lies can lodge themselves in popular culture and through repetition seem to be truthful when in fact they were a hoax. Please take a moment to read The Intelligent Plant
, it's a fascinating read about current scientific discoveries about plants.