花卉[kaki] flowering plants

花卉園芸[kakiengei] horticulture

育児園[ikujien] baby nursery
園芸[engei] horticulture
園児[enji] kindergarten pupil
園長[enchou] head of a garden
園遊会[enyuukai] garden party

果樹園[kajuen] orchard
開園[kaien] opening, either for the day or a "grand opening" (e.g. theme park, botanical garden etc.)
学園[gakuen] academy
学園祭[gakuensai] school festival

お花見[ohanami] cherry blossom viewing
一花[hitohana] success
卯の花[unohana] bean-curd lees
雲鬢花顔[unbinkagan] beautiful woman (metaphorical)
黄花[kouka] chrysanthemum

火花[hibana] spark
花の木[hananoki] flowering tree
花瓣[hanabira] (flower) petal
花より団子[hanayoridango] dumplings rather than flowers

一芸[ichigei] an art
隠し芸[kakushigei] hidden talent
園芸[engei] horticulture
演芸[engei] entertainment
学芸[gakugei] arts and sciences

曲芸[kyokugei] acrobatics
曲芸師[kyokugeishi] acrobat
芸者[geisha] geisha
芸術[geijutsu] (fine) art
芸術家[geijutsuka] artist