Built from local climate, tuned for the plant.

The climate evidence behind the calendars comes from the Met Office's HadUK-Grid dataset . It gives us a consistent, observed record from which to understand how frost patterns vary across the UK.

That produces a more useful starting point than applying one broad regional date to gardens with very different local conditions.

When you choose a location, the calendar uses a climate profile relevant to that area. This lets the same plant guide respond differently in a milder coastal town, a colder inland spot or somewhere further north.

The result is a town-level baseline, not a reading of your individual garden. Walls, slopes, shelter and frost pockets can all make a plot behave differently from its surroundings.

Broad beans and courgettes should not share the same treatment. Each guide reflects the crop's hardiness, the way it is grown and the relationship between sowing, transplanting and harvesting.

We combine those reviewed plant relationships with the local climate baseline to produce the windows shown on a calendar. The detailed processing, validation checks and crop-specific scheduling rules are part of the system we maintain.