germinate

ger·mi·nate
ˈjərməˌnāt/Submit
verb
(of a seed or spore) begin to grow and put out shoots after a period of dormancy.
synonyms: sprout, shoot (up), bud; More
cause (a seed or spore) to germinate.
come into existence and develop.
"the idea germinated and slowly grew into an obsession"
synonyms: develop, take root, grow, incubate, emerge, evolve, mature, expand, advance, progress
"the idea began to germinate"