What does the Gardener trait do in CK3?

Gardener: Stewardship +2, Stress Gain -20%, Courtier and Guest Opinion +10. Patch 1.20.0.3, from game/common/traits/00_traits.txt.

What is the trait ID of Gardener?

lifestyle_gardener — console: add_trait lifestyle_gardener, remove_trait lifestyle_gardener.

Lifestyle trait

Gardener

add_trait lifestyle_gardenerremove_trait lifestyle_gardener

Trait ID lifestyle_gardener. Console commands work with the debug mode on (launch option -debug_mode, then the ` key) and act on the character you play.

Gardener (trait ID lifestyle_gardener) is a lifestyle trait in Crusader Kings III: Stewardship +2, Stress Gain -20%, Courtier and Guest Opinion +10. It costs 50 points in the ruler designer. Some cultures and faiths add more (1 bonus on the page). Patch 1.20.0.3, from game/common/traits/00_traits.txt.

Quick answers (3)

What does the Gardener trait do in CK3?: Gardener: Stewardship +2, Stress Gain -20%, Courtier and Guest Opinion +10. Patch 1.20.0.3, from game/common/traits/00_traits.txt.
What is the trait ID of Gardener?: lifestyle_gardener — console: add_trait lifestyle_gardener, remove_trait lifestyle_gardener.
How many ruler designer points does Gardener cost?: 50 points (patch 1.20.0.3).

This character knows everything there is to know about gardens, plants, and how to tend to them.

Effects

Bonuses from culture and faith

Extra effects this trait gives only when the character's culture or faith has one of these.

Culture with Irrigation Experts

Compatibility

How characters with this trait feel about others' traits (opinion, in the game's compatibility points).

Likes

Source: game/common/traits/00_traits.txt and the English localisation, Crusader Kings III 1.20.0.3.