When I worked as a municipal horticulturist, I took care of twelve high-maintenance gardens, and a number of smaller ones, over I-don’t-know-how-many square miles of city, plus several hundred small trees, an insane number of shrubs, a greenhouse, and whatever else the bosses threw at me. I had to find a way to stay organized besides waking up at 3 a.m. to make extensive lists. My solution: keep a garden journal.