seven flowers of autumn
Refers to a traditional set of seven autumn flowers: bush clover (hagi), Chinese silvergrass (susuki), kudzu (kuzu), fringed pink (nadeshiko), golden lace (ominaeshi), thoroughwort (fujibakama), and balloon flower (kikyō). Often contrasted with 春の七草 (the seven herbs of spring).
See also: 春の七草
The seven flowers of autumn are also celebrated in the Man'yōshū.
I planted the seven flowers of autumn in my garden.