Just water it like you would a potted citrus tree. When it gets really warm and if the pups are alive, it should shoot out quickly. But if the max temperature remains colder than 50 deg F, or the minimum temp lower than 38 deg F, refrain any watering and better to bring the pot indoors where it will be warmer.
We are toasting out there now, 100 deg F and 60 deg F early morning lows. Banana pups are sometimes growing half a ft per week! They slow down when they reach a ft before blooming height.