Obtain seeds for the species you choose. Plant the seeds to promote germination. Photograph and journal the progress. Be consistent and clear about what you are doing with all species. We want to see what you did and how long it took for germination to occur.
Remember that you have weeks to complete this lab but you do need to start it promptly to reduce stress. Submit when you have seen the germination rates for the 4 species. I grade on the quality of work not on when the lab is submitted.