1680s, "capable of being tilled," from French cultivable, from cultiver, from Latin cultivare "to till" (see cultivate). Alternative form cultivatable (1753) seems to be a native formation from cultivate.
Entries linking to cultivable
cultivate v.
by 1650s, of land, "till, prepare for crops;" by 1690s of crops, "raise or produce by tillage;" from Medieval Latin cultivatus, past participle of cultivare "to cultivate," from Late Latin cultivus "tilled," from Latin cultus "care, labor; cultivation," from past participle of colere "to cultivate, to till; to inhabit; to frequent, practice, respect; tend, guard," from PIE root *kwel- (1) "revolve, move round; sojourn, dwell."
Figurative sense of "improve by labor or study, devote one's attention to" is from 1680s. Meaning "court the acquaintance of (someone)" is by 1707. Related: Cultivated; cultivating.