What's the adjective for evergreening? Here's the word you're looking for.
Included below are past participle and present participle forms for the
verb evergreen which may be used as adjectives within certain contexts.
evergreen
Of plants, especially trees, that do not shed their leaves seasonally.
Continually fresh or self-renewing; often used metaphorically.
(contracts) A clause which causes an automatic renewal of a contract unless action is taken.
(computing) Of a document, a piece of software, or a dataset, being continually up-to-date (as opposed to being published at regular intervals and outdated in the meantime)
(broadcasting) Suitable for transmission at any time; not urgent or time-dependent.