When and where you can use Ploom depends on where you want to use Ploom.  

You can enjoy a Ploom session at home or in your garden, but when it comes to other indoor or outdoor spaces it depends. 

For example, a lot of workplaces, restaurants and public transport companies have their own rules about using Heated Tobacco.
Some might have a private place for you to use Heated Tobacco, and some won't mind if you use your Ploom device indoors.
It's always a good idea to check the regulations in your region, as well as the rules of the space you're in.