How long have you been using Grid? I find t to be wonderful.
Center Text 2 is my Lifebloom. Numerical and color coded countdown.
Top right corner is Germination, bottom right is Rejuvenation, bottom left is Regrowth, and top left is Wild Growth. These use the corner icons, which are color coded to fade from green to yellow to red based on my personal taste (red is the "Pandemic zone" though). I don't find much need to track anything else, but I suppose one could add a center icon for Ironbark. Cultivation is too passive to worry about, no? Maybe tracking Spring Blossoms would be useful, but I'm not raiding on my Druid.