My goal is to find an integration that manages my 3 areas of the garden, the watering time, take into account whether it rained or not …

So I did some research, here is a first draft 

Smart Irrigation

• https://github.com/jeroenterheerdt/HAsmartirrigation
• https://community.home-assistant.io/t/smart-irrigation-save-water-by-precisely-watering-your-lawn-garden/197377
• Since May 2020, 210 commits, 15 PR closed

This integration makes clever calculations to limit the water consumed as much as possible according to meteorological parameters and rainfall. This is more irrigation than lawn watering.

Irrigation Unlimited

• https://github.com/rgc99/irrigation_unlimited
• https://community.home-assistant.io/t/irrigation-unlimited-integration/325468
• Since July 21, 670 commits, 8 PR closed

• http://homeassistant.local:8123/hacs/repository/447474061
• 791 downloads

This integration seems interesting, archi versatile, updates are regular and recent. I will continue the integration round but I like it.

Irrigation-V5

• https://github.com/petergridge/Irrigation-V5
• https://community.home-assistant.io/t/irrigation-custom-component-with-custom-card/124370
• Since July 2019, 277 commits, 5 PR closed

• http://homeassistant.local:8123/hacs/repository/572297252
• 737 downloads

This map is very simple to understand, I really like, definitely only treasures in these integrations.

HA-Irrigation-Version2

• https://github.com/kloggy/HA-Irrigation-Version2
• https://community.home-assistant.io/t/my-garden-irrigation/99686
• Since February 2019, 487 commits, 14 PR closed

Very nice screen also, by area, we can adjust everything. To discover …

Latest version May 2023 (retex written in June 2023)