About (five trees and six flowers), which scripture is it based on?

"Five trees and six flowers" refers to five trees and six flowers that must be planted in temples according to Buddhist scriptures. Five trees refer to bodhi tree, Ficus altissima, palm leaf, betel nut and sugar palm; Six flowers refer to lotus (lotus), asparagus, turmeric, frangipani, osmanthus and Trollius. These plants are endowed with profound Buddhist connotations because of their unique forms, and their legends have been circulated for thousands of years.

Five kinds of trees: bodhi tree, Ficus altissima, palm leaf, betel nut and sugar palm.

Six flowers: lotus, asparagus, turmeric, frangipani, osmanthus, trollius.

Hinayana Buddhism. See theravada