In the field of crop science, it is fundamental to identify, characterize, and classify cultivated plants. Doing so could unlock the value and potential of a particular crop species. Knowledge of these also allows us to assess and consider the various genotypic and environmental factors that are vital to its effective management. This field guide will introduce the first 99 commonly cultivated plants in the Philippines. As a guiding principle, we have prioritized including crops that have a higher volume of production, and a wider area planted/harvested in the country. We have also stratified the selection process to reflect the various agricultural classifications. Although there are a lot of ways to characterize and classify plants, we have selected salient traits and classification systems that would provide a user-friendly means of identification, and, at the same time, give insights into the efficient cultivation/production, breeding, and conservation of the crop species.