@Bugchico it looks like you have a healthy plumeria. If your temp is now consistently above 50's you can proceed with normal watering. Otherwise wait till you have a set of 6 leaves. Plumeria leaves will droop if it is not getting enough water or moisture. If temps are still below 50s and you are keeping it indoors, just give it a little drink to moisten the soil but not get the soil wet. When in doubt, It is better to keep it on the dry side.