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

育成栽培[ikuseisaibai] vegetable and fruit growing
栽培[saibai] cultivation
栽培種[saibaishu] agricultural species
栽培所[saibaijo] plantation
純粋培養[junsuibaiyou] clean (pure) culture

促成栽培[sokuseisaibai] raising out-of-season crops with artificial heat
培う[tsuchikau] to cultivate
培養[baiyou] cultivation
培養液[baiyoueki] culture fluid
培地[baichi] culture medium