Perennial

ajaton

(continuing without cessation or intermission for several years, or for an undetermined or infinite period — see also perpetual, unceasing)

jatkuva

(continuing without cessation or intermission for several years, or for an undetermined or infinite period — see also perpetual, unceasing)

monivuotinen

(of a plant: active throughout the year, or having a life cycle of more than two growing seasons)

toistuva

(appearing or recurring again and again — see also recurrent)

ympärivuotinen

(lasting or remaining active throughout the year, or all the time)

monivuotinen kasvi

(plant active throughout the year, or has a life cycle of more than two growing seasons)

perenna

(plant active throughout the year, or has a life cycle of more than two growing seasons)