I think this might the phrase I'm looking for, for herbs?
"Continual harvest" suggests that you're always maintaing them, and once in a while you grow a few
more from seed, to replace the annuals that die back.
https://sproutedgarden.com/perennial-herbs/
https://www.reddit.com/r/HawaiiGardening/comments/1f0hyda/comment/ljs82fl/
    
    Holy basil / Tulsi basil