Technical Abstract: Greenhouses are complex systems. One management decision invariably influences another in often unexpected or unforeseen ways. As seasons change, management practices may shift from optimizing production for plant quality or “yield” to efficiency and reduced energy costs. These decisions impact the performance of plants, likelihood of disease outbreaks, and labor. Virtual Grower 1.0 is software that helps take some of the guesswork out of greenhouse management generally, and help guide producers into saving energy and money. Since its release in January, 2006, we have received feedback from the industry on how to improve the software including adding photographic examples of systems, developing a way to estimate air infiltration and heating efficiency, and additional options for energy curtains. Virtual Grower 2.0 has improved the existing features based on industry suggestions, and added plant growth to calculate time to flowering for seven floriculture crops and crop size for these crop as well as a commonly grown greenhouse vegetable. The introduction of plant growth to Virtual Grower is the initial step in bringing together simple, yet powerful, crop growth models and greenhouse “energy balance” calculators, and allows for interactions among crop growth and development models with greenhouse heating models. Users will now be able to optimize their production systems for a few floriculture crops with regards to energy, heating costs, crop timing, and crop size.