It is really thirsty, water freely during growing months and moderately in Winter. Keep soil evenly moist, but do not overwater making the soil too soggy.
In general, Heliconias are evergreen in the Tropics and warm Subtropics, like zone 10. Further north, upper zone 9 and lower zone 8, they may be frozen back to the ground each Winter but survive to resprout the next Spring.