Eight houseplants, three sticky notes, one dead fern. Watering on memory fails because every plant runs its own clock. This workbook does the date math: set the interval once and it tells you what is due. The Plant inventory tab carries 40 rows for name, species, room, pot, light, watering interval and last watered, with dropdowns already wired. The Watering schedule takes that interval and returns a next-due date per plant, with overdue and due-today flags that recolor the row so a Thursday slip shows up on Thursday. The Care log records date, plant and an action from a dropdown covering water, fertilize, repot, prune and pest, plus an auto last-watered panel that keeps the schedule honest. The Fertilize tab lists feeding due dates per plant and carries a winter halve-or-pause note. The growth and repot log holds height, leaf counts and pot swaps. The Dashboard answers the question you open the file for: what is due today, how many are overdue, what lands in the next 7 days, which species you own, and which room is crowded. Two printables come along, a weekly watering checklist and a 4-page quick-start on watering, light, feeding, repotting and troubleshooting. Built for indoor plants and their pots, not garden beds. Works in Excel, Google Sheets and LibreOffice. Eight sample plants show real dates, so replace them with yours. General care guidance only, every plant and home differs, and checking your soil first beats any schedule.