Khat is a warm-temperate shrub that grows best in the 18–24°C range with 800–1100 mm of rain, cropping over a 120–210-day season.

Khat grows on a woody shrub, its fruit held above the ground.
Climatic suitability only — scored for every 0.5° of the planet from this crop's temperature and rainfall tolerances (FAO EcoCrop) on AgroClim 1991–2025 normals (AgERA5 temperature, CHIRPS/ERA5 rainfall). It shows where the rain-fed climate permits the crop, not where it is grown today; irrigation lets many crops thrive in drier country than the map suggests (California, Egypt, the Indus and Nile).
Deep bar = optimal range; pale bar = absolute tolerance. Beyond the pale bar the crop fails. Latitude tolerance ±35° · soil pH 6–8.
An annual cycle of roughly 120–210 days from sowing to harvest, so it is timed to fall within the frost-free, adequately-wet part of the year for the location.