Green was caution itself before reaching the half century mark but then accelerated with the declaration in sight, plundering four big sixes before getting a faint edge to a Bumrah delivery.
"He played well," Garin said. "He played really flat, really fast. The ball helps his game a lot and I hope he can play like this the rest of the year."
The hosts went to the break on 312 for six, with Cameron Green out for 84 off the last ball before the break, during which captain Tim Paine called a halt.