Forcing techniques involve growing vegetables in artificial structures like greenhouses to control the environment and grow crops out of their normal season. This allows vegetables to be grown when it is too hot, cold, or dry outside. Forcing techniques require additional costs, structures, technical knowledge, and specialized varieties of crops like tomatoes, cucumbers, and peppers that are suitable for these conditions. Common forcing methods include the use of hotbeds, low tunnels, and different types of greenhouses that vary in their level of climate control. Forcing techniques can extend the growing season and allow year-round production of vegetables but also present challenges like higher production costs and managing pests and diseases in the controlled environment.