Irrigation and Fertiliser Task Calendar by Plot

Irrigation and Fertiliser Task Calendar by Plot is an offline app (one HTML file in a zip) for a farm, greenhouse or nursery that repeats the same jobs on every plot. You define the task types once, such as drip cycle every 2 days or feed every 14 days, then attach them to each plot. Each time someone does a job you log it, and the app works out the next due date from the last log. The Today page lists what is overdue, due today and due in the next days, and a calendar shows the coming weeks.

The problem it removes: Field jobs repeat on different cycles for different plots, so the schedule lives in the farm manager head or on a whiteboard that is wiped. A feed is missed because nobody noticed it was last done five weeks ago. This app keeps one line per plot and task, shows the last time and the next time, and flags what has slipped.

What is inside:

• Plots with crop, area, water source, the person who looks after it and their phone
• Task types with a category and a repeat interval in days, such as drip cycle, feed, foliar spray, pest walk
• A schedule line for each plot and task with its own interval if the plot differs, a first due date and a pause switch for fallow plots
• A work log with date, who did it and the amount used
• Last done, next due, days overdue and a status of Overdue, Due today, Due soon or OK for every line
• Today page, calendar of coming tasks, and a WhatsApp message to the plot worker for overdue jobs
• A printable plot task card and a printable task list for a period
• Example data you can load in one click, a Start here guide and an Honest limits panel
• JSON backup and restore, CSV export, and CSV import with a check of every row before anything is added

Who it is for: farm managers, greenhouse growers, date palm grove owners and nurseries with several plots, houses or beds that each need regular watering, feeding and checks.

What it is NOT: It does not measure soil moisture or weather, does not tell you how much water or fertiliser a crop needs and gives no agronomy advice. It does not control irrigation equipment. A task is scheduled by a fixed number of days after the last time it was logged, not by season or crop stage. It is not legal, tax or accounting advice, it is not connected to any government system, bank or messaging service, and it does not file or send anything by itself. UAE e-invoicing is not part of it.

Your data stays on this device in your browser. Back it up with Export; clearing browser data loses it otherwise.

Verified by us: scripted tests in Chromium (156 checks through the real screens: adding, editing and deleting records in every table, required-field messages, backup then clear then restore, CSV export then import, keyboard order, print layouts rendered to PDF, no horizontal scrolling at 375 and 1280 pixels, no network requests) and an independent recalculation by a separately written Python evaluator of 1144 calculated values (25 randomised rows plus the example data) with 0 mismatches. Safari engine (WebKit): smoke test passed. Not tested: Firefox beyond what is stated here, and no real printer was used (print layouts were checked as PDF).