It is found that the farmers of Australia have a major concern about the security as well as privacy due to large scale of entire dissemination in IOT based greenhouse project. Thus, it is very much necessary to develop lightweight blockchain based IoT architecture for the greenhouse farms for providing proper security as well as privacy. It is found that in Australia, the farmers utilize manual method including hand weeding as well as utilization of hand tools for farming which creates number of issues including problems in weed seedlings, challenges in covering