Usage patterns
芽が伸びるthe sprout grows longer
The sprout from the planted seed is getting longer every day.
〈植物〉に芽をつけるa plant puts out buds
The cherry tree is already putting out buds.
芽が育つthe sprout develops/grows up
When I kept it in a warm room, the sprout grew well.
Expressions
芽が出るbud; sprout; germinate · get lucky; have luck on one's side 木の芽時early spring; time when trees bud