This chapter covers key dynamics and mass flow for crop plants, algae, and cyanobacteria. Initially the chapter explores the basic concepts for vascular plant biology, including how they grow and the difference between the root and aerial environments. Then the chapter moves to common Earth crops, including grains, fruits, vegetables, and tubers, with mass flow models and growth parameters for each type, and some examination of technologies to grow herbs, bush, and tree crops. Then the chapter moves cyanobacteria and various alga types like kelp and microalgae like chlorella, to lichens and mosses, including multiple growth models and key technologies for growth. At the end of the chapter is discussion of the maturity of space farms and the succession of crops over time.