It would be nice to come up with predictive systems that can provides estimates of the number of modules (leaves, branches, flowers and so on) of a plant that would be growing provided a set of conditions such as resources of water, nutrients and conditions of solar radiation and temperature. Such models may be statistical. One can use machine learning such as neural networks or artificial intelligence to build such models. That would be an interesting project to pursue. Probably there are already such systems existing, it would be still interesting to pursue this more and expand on them.