Research graduate schools and programs where you can obtain a PhD in botany. When considering a PhD, it is vital to choose a school where you will have a mentor whose specialty is in the same area as yours. Therefore, when researching schools, the most important factor is the staff, their specialties and the open graduate student positions.
Contact graduate professors by email or telephone and let them know that you're interested in getting your PhD in botany. Talk to them about your proposed thesis and see if they would be able to mentor you for the duration of your project.
Schedule college visits to see the campuses. Let the professors whom you have talked with know that you will be in the area and arrange a meeting with them.
Apply to the botany PhD programs that interest you. Note that application processes are lengthy and may require several months to be completed properly. Start well ahead of the application due date to ensure that you will not be rushed. Contact your references ahead of time and ask them politely if they would be willing to write you letters of recommendation. Thank them for their work with a handwritten thank you note. Write thoughtful personal statements that set you apart from the rest of the applicants who are interested in the program.
Register for any exams, such as the GRE, that are required for admission into the program. Study using online guides, textbooks and any other resources you can. Prepare for the exam as thoroughly as you can; good exam results will not only help you get into the program, but can also help you obtain grants to diminish the costs of graduate school programs. The night before the exam, go to bed early. Eat a good meal before the exam to help you concentrate.