Good luck. Send me some plants before you get too busy!
As I look back at mine, recently finished, definitely make sure you go funded. In the sciences this is no problem, plenty available. For me the most important thing is the time needed. Four years is a long time, if you get to the point when you think its time, really look at the group you will work in, the departments aims and ambitions, your supervisors publication history, and your interest in the topic. I see students quit for this or that, it is unfortunate. It is maybe masochistic, but PhD can be the best choice to make.
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