Growing plants is not a hobby, Beach. It is a career opportunity for the plant. You employ the plant to grow and in return you take general care of it. Make sure, regardless of the plant, that it has all its work papers in order and that you outline its wages, health benefits, pension, etc. beforehand. This will save you a great deal of trouble down the road, bon ami.
This is quite a good opportunity for the plants, you know. They are discriminated against in the work place, so getting a job in the public sector is unrealistic. Private employment is all they can go for. So good on you for supporting their cause and getting them into the workforce. C: