Tenochtitlán, what is now Mexico City, was known as the city of gardens. Creating gardens was a hobby of the nobility.

Flowers were associated with peace in ancient Mexica poetry.

Historically, flowers are people to the Mexica. Specifically warriors who were destined for the other world and who eventually became companions of the Sun.

'Nenenemiya yectli ya toxochihui.' Our good flowers [warriors] march along.--Aztec poem