Hummingbird feeders should remain up until the homeowner has not seen a hummingbird at the feeder for two weeks or more. In some areas, hummingbirds may remain all year long. In Northern Hemisphere, hummingbirds usually migrate away during the fall and return to the area in the spring.
Leaving a feeder up does not cause hummingbirds to not migrate unless they typically remain in the area year round. Feeders should be placed in the shade if possible to prevent the nectar from spoiling. Feeders placed in direct sunlight may require the nectar to be changed more frequently. Placing feeders near flowers or plants can help hummingbirds locate it.