A schedule engine, not a calendar template.
Pratela takes a fixed set of dated agronomy rules and filters, orders and re-times them for one lawn. The output is a week-by-week list of work orders, each with an amount, a window and a citation.
- 01
You describe one lawn.
Name, area, town, grass type (cool- or warm-season), sun, how often you can get to it, and whether you are starting a new plot, renovating an old lawn or maintaining an established one. About four minutes. Optionally a photo, and what you have already done this season.
- 02
The engine filters 76 dated rules.
Every rule carries a phase, a season, an order and a priority; seasonal rules add a dated window and material rules add a rate. Rules that do not apply to your grass, phase or equipment are dropped, windows flip six months for the southern hemisphere, and the rest are placed in the year, sequenced where one job depends on another, and quantified from your area.
- 03
Weather moves windows, never invents them.
A local forecast can hold a job (heavy rain before a feed), defer it (wind before a spray), or promote it (a growth surge). The only jobs it adds are two emergency rules from the manual — extra watering in a heatwave and an extra mow in a growth surge.
- 04
Marking a task done re-ranks the rest.
Your next moves are always the due, unheld tasks in priority order. Complete one and the list closes up; miss a window and the task rolls to its next real opportunity instead of nagging.
Every card shows a number.
- Amount
- Computed from your area and the rule's rate — e.g. 7.5 kg of seed for 250 m² at 30 g/m².
- Window
- The rule's dated window for your hemisphere, shifted by the weather when it matters.
- Rule
- The rule id and the references behind it — su-mow-high · Hessayon; Mellor; Walheim.
- Why now
- One plain-language paragraph, written on-device where the hardware allows, from the rule's own reasoning.
- Plate
- A silent looping clip of the job, numbered like a figure in a printed manual.
- Height
- 5–6 cm · never more than ⅓ of the blade
- Window
- Jun 1 – Aug 31
- Rule
- su-mow-high · Hessayon; Mellor; Walheim
In heat, raise the height to 5–6 cm — taller grass shades the roots and holds moisture.
Where these rules come from.
The rules were written by the author for a continental, cool-season climate and checked against these references. They summarise, not quote. Each manual entry lists the sources it cites; each source lists the rules that cite it.
Nothing is invented at run time: the engine is deterministic and offline, and the same inputs always produce the same schedule.