Does talking to plants help them grow better? 

Many people think so, but others think that talking to your plants is a bit looney.

In fact, there may be some truth in it.

Plants grow better when they have more carbon dioxide. 

The level of carbon dioxide in ordinary air is quite low, but the air we  breathe out has a lot more.

If you talk to a plant, you breathe on it, giving it  extra carbon dioxide. 

However, to have any real effect, you would probably have to talk to the  plant for several hours each day.